Nothing Special   »   [go: up one dir, main page]

WO2013136651A1 - Système de télécommunications par fibres optiques, dispositif de transmission par fibres optiques, dispositif de réception par fibres optiques, procédé de télécommunications par fibres optiques, procédé de transmission par fibres optiques, dispositif de fixation de rotation de phase et procédé de réception par fibres optiques - Google Patents

Système de télécommunications par fibres optiques, dispositif de transmission par fibres optiques, dispositif de réception par fibres optiques, procédé de télécommunications par fibres optiques, procédé de transmission par fibres optiques, dispositif de fixation de rotation de phase et procédé de réception par fibres optiques Download PDF

Info

Publication number
WO2013136651A1
WO2013136651A1 PCT/JP2013/000387 JP2013000387W WO2013136651A1 WO 2013136651 A1 WO2013136651 A1 WO 2013136651A1 JP 2013000387 W JP2013000387 W JP 2013000387W WO 2013136651 A1 WO2013136651 A1 WO 2013136651A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
transmission
optical signal
phase rotation
signal
Prior art date
Application number
PCT/JP2013/000387
Other languages
English (en)
Japanese (ja)
Inventor
慎介 藤澤
大作 小笠原
透 高道
Original Assignee
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Publication of WO2013136651A1 publication Critical patent/WO2013136651A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers

Definitions

  • the present invention relates to an optical communication system, an optical transmission device, an optical reception device, an optical communication method, an optical transmission method, a phase rotation setting device, and an optical reception method using an optical signal.
  • optical phase modulation method using a digital signal processing technology and a polarization multiplexing / demultiplexing technology.
  • a technique combining an optical phase modulation system and a polarization multiplexing / demultiplexing technique, so-called optical digital coherent communication system, has been attracting attention in recent years because it can realize high speed in long-distance optical communication.
  • Patent Documents 1 and 2 there are technologies described in Patent Documents 1 and 2 as technologies related to optical communication.
  • Patent Document 1 performs compensation for waveform distortion occurring in a transmission path by sharing between a transmitting station and a receiving station. Details are as follows. First, an optical signal transmitting station performs distortion compensation on a transmission signal based on a transmission distortion compensation coefficient. The optical signal receiving station performs distortion compensation on the received signal based on the received distortion compensation coefficient.
  • Patent Document 2 sets the dispersion amount of dispersion compensation on the transmission side so that the number of bit errors detected on the reception side is minimized.
  • the optical signal undergoes phase fluctuation proportional to the square of the amplitude due to the nonlinear optical effect during transmission of the optical fiber. For this reason, the transmission characteristic of the optical signal is deteriorated.
  • An object of the present invention is to provide an optical communication system, an optical transmission device, an optical reception device, an optical communication method, an optical transmission method, a phase rotation setting device, and an optical reception method that suppress degradation of an optical signal during transmission of an optical fiber. Is to provide.
  • an optical transmission device that transmits an optical signal for transmission;
  • An optical receiver for receiving the optical signal for transmission;
  • the optical transmitter is Optical signal generating means for generating the transmission optical signal by modulating a carrier wave;
  • Filter processing means for performing a process of adding a phase rotation of a magnitude obtained by multiplying the square of the deviation of the carrier wave at the frequency by the same constant for each frequency of the carrier wave to the transmission optical signal;
  • Have The optical receiver is a compensation unit that performs processing for compensating the phase rotation added to the optical signal for transmission by the filter processing unit with respect to a signal generated based on the optical signal for transmission;
  • An optical communication system is provided.
  • an optical transmission device that transmits an optical signal for transmission;
  • An optical receiver for receiving the optical signal for transmission;
  • the optical transmitter is Optical signal generating means for generating the transmission optical signal by modulating a carrier wave;
  • the integrated value of the peak value of the light intensity in the extending direction of the optical fiber or the extending direction of the optical fiber of PAPR (Peak to Average Power Ratio) of the light intensity Filter processing means for applying phase rotation to the transmission optical signal so that the integrated value at Have
  • the optical receiver includes a compensation unit that performs a process of compensating the phase rotation added to the transmission optical signal by the filter processing unit with respect to a signal generated based on the transmission optical signal.
  • an optical signal generating means for generating a transmission optical signal by modulating a carrier wave
  • Filter processing means for performing a process of adding a phase rotation of a magnitude obtained by multiplying the square of the deviation of the carrier wave at the frequency by the same constant for each frequency of the carrier wave to the transmission optical signal;
  • An optical transmission device is provided.
  • the present invention comprising a compensation means for performing a filtering process on a signal generated based on a transmission optical signal transmitted from an optical transmission device,
  • the transmission optical signal is generated by modulating a carrier wave, and for each frequency of the carrier wave, a phase rotation having a magnitude obtained by multiplying the square of the deviation of the carrier wave at the frequency by the same constant is applied.
  • the compensation means is provided with an optical receiver that performs processing for compensating for the phase rotation.
  • an optical transmission device that transmits an optical signal for transmission;
  • An optical receiver for receiving the optical signal for transmission; Used with an optical communication system comprising:
  • the optical transmitter is Optical signal generating means for generating the transmission optical signal by modulating a carrier wave;
  • Filter processing means for performing a process of adding a phase rotation of a magnitude obtained by multiplying the square of the deviation of the carrier wave at the frequency by the same constant for each frequency of the carrier wave to the transmission optical signal;
  • Have The optical receiver includes a compensation unit that compensates for the phase rotation added to the optical signal for transmission by the filter processing unit in a signal generated based on the optical signal for transmission;
  • a phase rotation setting device is provided that transmits information indicating the magnitude of the phase rotation to the filter processing means and the compensation means.
  • the optical transmission device generates a transmission optical signal by modulating a carrier wave, and the transmission optical signal is divided into the square of the deviation of the carrier wave at the frequency for each frequency of the carrier wave. Add a phase rotation with the same constant multiplied, An optical communication method is provided in which an optical receiver compensates the phase rotation for a signal generated based on the transmission optical signal.
  • an optical signal for transmission is generated by modulating a carrier wave, and the same constant as the square of the deviation of the carrier wave at the frequency for each frequency of the carrier wave with respect to the optical signal for transmission.
  • An optical transmission method for transmitting the transmission optical signal after performing the process of applying the phase rotation of the magnitude multiplied by the above is provided.
  • a process that is generated by modulating a carrier wave and adds a phase rotation having a magnitude obtained by multiplying the square of the deviation of the carrier wave at the frequency by the same constant for each frequency of the carrier wave.
  • an optical reception method for receiving a transmission optical signal subjected to the above and performing a process for compensating the phase rotation on a signal generated based on the transmission optical signal.
  • FIG. 1 is a diagram illustrating a configuration of an optical communication system according to the first embodiment.
  • This optical communication system includes an optical transmitter 10 and an optical receiver 20.
  • the optical transmitter 10 transmits an optical signal for transmission.
  • the optical receiver 20 receives a transmission optical signal.
  • the optical transmission device 10 includes an optical signal generation unit 110 and a filter processing unit 120.
  • the optical signal generation unit 110 generates a transmission optical signal by modulating a carrier wave based on a signal to be transmitted (transmission signal).
  • the filter processing unit 120 applies a phase rotation to the transmission signal for each frequency of the carrier wave with a magnitude obtained by multiplying the square of the carrier wave deviation at that frequency by the same constant (ie, a magnitude proportional to the deviation). Process.
  • the filter processing unit 120 applies phase rotation to the transmission optical signal by processing the transmission signal.
  • the filter processing unit 120 does not directly hold the phase rotation amount as a parameter, but may hold a parameter that affects the phase rotation amount.
  • the optical receiver 20 has a compensation unit 210.
  • the compensation unit 210 performs processing for compensating for the above-described phase rotation on the signal generated from the transmission optical signal. Note that the compensation unit 210 does not directly hold the phase rotation amount as a parameter, but may hold a parameter that affects the phase rotation amount.
  • the nonlinear optical effect in the optical fiber is proportional to the intensity of the transmission optical signal.
  • the intensity of the transmission optical signal is simply lowered, the SN (Signal to Noise) ratio of the transmission optical signal is lowered.
  • a process for applying a phase rotation of a magnitude obtained by multiplying the square of the deviation of the carrier wave at the frequency by the same constant for each frequency of the carrier wave is performed on the transmission signal. Applying such phase rotation imparts chromatic dispersion to the carrier wave.
  • chromatic dispersion is given to the carrier wave, the peak value of the light intensity of the optical signal at each point of the optical fiber transmission line changes.
  • the integrated value of the peak value of the light intensity in the extending direction of the optical fiber, or the light It is possible to reduce the integrated value of PAPR (Peak-to-Average-Power-Ratio) in the drawing direction of the strong optical fiber.
  • PAPR Peak-to-Average-Power-Ratio
  • the integrated value can be lowered. Therefore, the nonlinear optical effect in the optical fiber can be suppressed without reducing the average intensity of the transmission optical signal. Therefore, it is possible to suppress degradation of the optical signal during transmission of the optical fiber.
  • the above integrated value can be obtained, for example, by providing measurement points at predetermined intervals in the drawing direction of the optical fiber and integrating the measurement results (or simulation values).
  • the filter processing unit 120 if the constant used by the filter processing unit 120 is set to an appropriate value, the integrated value described above can be minimized. In this case, the above-described effect becomes the largest.
  • FIG. 2 is a diagram illustrating a configuration of the optical transmission device 10 according to the second embodiment.
  • FIG. 3 is a diagram illustrating a configuration of the optical receiving device 20 according to the present embodiment.
  • the optical communication system according to the present embodiment is the same as the optical communication system according to the first embodiment except for the detailed configurations of the optical transmission device 10 and the optical reception device 20.
  • the optical communication system according to the present embodiment transmits and receives signals using an optical digital coherent method.
  • the optical transmission device 10 includes optical modulation units 112 and 114, filter processing units 122 and 124, drive signal generation units 132 and 134, DA (Digital-to-Analog) conversion units 142 and 144, a ⁇ / 2 phase shifter 150, and laser oscillation. Part 152 is provided.
  • the optical modulation units 112 and 114 constitute an optical signal generation unit 110
  • the filter processing units 122 and 124 constitute a filter processing unit 120.
  • the laser oscillation unit 152 oscillates a laser beam that becomes a carrier wave.
  • the laser beam generated by the laser oscillation unit 152 is branched into two and input to the light modulation unit 112 and the light modulation unit 114.
  • the drive signal generators 132 and 134 generate drive signals based on signals to be transmitted.
  • the filter processor 122 performs a filtering process on the drive signal generated by the drive signal generator 132.
  • the filter processing unit 124 performs a filtering process on the drive signal generated by the drive signal generation unit 134.
  • the filtering process performed by the filter processing unit 122 adds a phase rotation of a magnitude obtained by multiplying the square of the carrier wave deviation at the frequency by the same constant to the optical signal generated by the optical modulation unit 112 for each frequency. It is.
  • the filtering process performed by the filter processing unit 124 applies, to the optical signal generated by the optical modulation unit 114, a phase rotation having a magnitude obtained by multiplying the square of the carrier wave deviation at the frequency by the same constant for each frequency. It is.
  • the magnitude of the phase rotation applied to the optical signal by the filter processing unit 122 and the filter processing unit 124 may be equal to each other or may be different from each other.
  • the filter processing units 122 and 124 are, for example, FIR (Finite Impulse Response) filters.
  • the filter processing units 122 and 124 may perform the above-described processing using a lookup table.
  • the light modulator 112 modulates the laser beam according to the drive signal processed by the filter processor 122 to generate an optical signal.
  • the light modulator 114 modulates the laser light according to the drive signal processed by the filter processor 124 to generate an optical signal.
  • the ⁇ / 2 phase shifter 150 changes the transfer of the optical signal generated by the light modulation unit 114 by ⁇ / 2. Thereafter, the optical signal generated by the optical modulation unit 112 and the optical signal generated by the optical modulation unit 114 are combined into an optical signal for transmission. This transmission optical signal is transmitted to the optical receiver 20 via the optical fiber 300.
  • the optical communication system further includes an optical fiber information management unit 310 and a phase rotation setting device 320.
  • the optical fiber information management unit 310 stores the peak value of the intensity of the transmission optical signal in the extending direction of the optical fiber 300 or the integrated value of PAPR. These integrated values may be calculated by the optical fiber information management unit 310 or may be input to the optical fiber information management unit 310 from the outside.
  • the phase rotation setting device 320 sets the phase rotation amount in the filter processing units 122 and 124 or the chromatic dispersion amount to be added by the filter processing units 122 and 124 based on the information stored in the optical fiber information management unit 310. The set value is transmitted to the filter processing unit 122 and the filter processing unit 124.
  • phase rotation setting device 320 changes the values transmitted to the filter processing unit 122 and the filter processing unit 124 while observing the change of the integrated value stored in the optical fiber information management unit 310, and thereby the filter processing unit 122 and An optimum value to be transmitted to the filter processing unit 124 may be determined.
  • the optical receiver 20 includes a compensation unit 210, a local light generation unit 220, a 90 ° optical hybrid 222, an optical detector 224, an AD (Analog-to-Digital) converter 226, a chromatic dispersion compensation unit 228, a polarization separation unit 230, and a deviation compensation unit 232. And a symbol identification unit 234.
  • a compensation unit 210 a local light generation unit 220, a 90 ° optical hybrid 222, an optical detector 224, an AD (Analog-to-Digital) converter 226, a chromatic dispersion compensation unit 228, a polarization separation unit 230, and a deviation compensation unit 232.
  • AD Analog-to-Digital
  • the local light generator 220 oscillates local light. Local light has substantially the same frequency as the carrier wave.
  • the 90 ° optical hybrid 222 receives a transmission optical signal and local light from the local light generator 211.
  • the 90 ° optical hybrid 222 generates four optical signals by causing the optical signal and local light to interfere with each other.
  • the optical detector 224 photoelectrically converts the four optical signals generated by the 90 ° optical hybrid 222 to generate four analog signals.
  • the AD converter 226 converts the four analog signals generated by the optical detector 224 into digital signals, respectively.
  • the compensation unit 210 performs compensation processing on each of the four digital signals generated by the AD converter 226 based on the values sent from the phase rotation setting device 320. This compensation processing adds optical phase rotation, which has the same absolute value and opposite sign, to the optical phase rotation given to the optical signal for transmission by the filter processing unit 120 of the optical transmission device 10.
  • the chromatic dispersion compensation unit 228 performs processing for compensating the chromatic dispersion added to the transmission optical signal in the optical fiber 300 on the four digital signals processed by the compensation unit 210.
  • the polarization separation unit 230 generates a signal indicating the transmitted information using the four digital signals.
  • the deviation compensation unit 232 compensates for a frequency deviation and an optical phase deviation between the transmission optical signal and the local light. Thereby, the noise of the signal due to the rotation of the optical phase is compensated.
  • the symbol identification unit 223 performs symbol determination using the signal after compensation by the deviation compensation unit 232. Thereby, the transmitted signal is demodulated.
  • FIG. 4 is a diagram showing the relationship between the transmission distance of the optical signal and the peak value of the intensity of the optical signal.
  • a dotted line indicates a simulation result when the filter processing unit 120 and the compensation unit 210 are not operated
  • a solid line indicates a simulation when the filter processing unit 120 and the compensation unit 210 are operated. Results are shown. From this figure, it can be seen that the peak value of the intensity of the optical signal changes by operating the filter processing unit 120 and the compensation unit 210.
  • FIG. 5 is a diagram illustrating a relationship between the magnitude of the phase rotation (parameter value) applied by the filter processing unit 120 and the compensation unit 210 and the integrated amount of the peak value of the light intensity of the transmission signal in the extending direction of the optical fiber 300. is there. From this figure, when the parameter is set to an appropriate value, the integrated value of the peak value of the intensity of the optical signal can be reduced as compared with the case where the parameter is 0, that is, when the filter processing unit 120 and the compensation unit 210 are not operated. I understand that.
  • FIG. 6 is a diagram illustrating the relationship between the magnitude of the phase rotation (parameter value) applied by the filter processing unit 120 and the compensation unit 210 and the Q value of the signal received by the optical receiver 20. From this figure, it can be seen that the Q value increases when the parameter is set to an appropriate value. Comparing FIG. 5 and FIG. 6, it can be seen that the Q value increases when the integrated value of the peak value of the intensity of the optical signal decreases.
  • the phase rotation setting device 320 recognizes the peak value of the intensity of the optical signal for transmission stored in the optical fiber information management unit 310 or the integrated value of the PAPR, and sets the parameters of the filter processing unit 120 and the compensation unit 210. Can be changed. For this reason, the parameters of the filter processing unit 120 and the compensation unit 210 can be easily set by using the phase rotation setting device 320.
  • the administrator of the optical communication system may directly set the parameters of the filter processing units 122 and 124 and the compensation unit 210 without providing the phase rotation setting device 320.
  • FIG. 7 is a diagram illustrating a configuration of the optical transmission device 10 according to the third embodiment
  • FIG. 8 is a diagram illustrating a configuration of the optical reception device 20 according to the third embodiment.
  • the optical transmitter 10 and the optical receiver 20 shown in this figure transmit and receive optical signals using the polarization multiplexing method.
  • the basic configuration of the optical transmitter 10 and the optical receiver 20 is the same as that of the second embodiment.
  • the optical transmission device 10 includes two sets of a drive signal generation unit 132, a filter processing unit 122, and a DA conversion unit 142.
  • the first set of drive signal generation unit 132, filter processing unit 122, and DA conversion unit 142 generate drive signals corresponding to the I phase.
  • the second set of drive signal generation unit 132, filter processing unit 122, and DA conversion unit 142 generate drive signals corresponding to the Q phase.
  • the drive signals output from the two DA converters 142 are both input to the light modulator 112.
  • the light modulation unit 112 is an optical I / Q modulator.
  • the optical transmission device 10 also includes two sets of the drive signal generation unit 134, the filter processing unit 124, and the DA conversion unit 144.
  • the first set of drive signal generation unit 134, filter processing unit 124, and DA conversion unit 144 generate drive signals corresponding to the I phase.
  • the second set of drive signal generator 134, filter processor 124, and DA converter 144 generates a drive signal corresponding to the Q phase.
  • the drive signals output from the two DA converters 144 are both input to the light modulator 114.
  • the light modulator 114 is also an optical I / Q modulator.
  • Both the two filter processing units 122 and the two filter processing units 124 perform a process of adding a rotation phase to the drive signal according to the information transmitted from the phase rotation setting device 320.
  • the optical transmission device 10 has a multiplexing unit 160.
  • the multiplexing unit 160 is in a state in which the optical signal (first optical signal) generated by the optical modulation unit 112 and the optical signal (second optical signal) generated by the optical modulation unit 114 are orthogonal to each other.
  • the optical signal for transmission is generated by multiplexing in the above.
  • the optical receiver 20 has the same configuration as 30 according to the second embodiment except for the following points.
  • the 90 ° optical hybrid 222 generates an optical signal (I x ) by causing an optical signal and local light to interfere with each other with a phase difference of 0, and causes the optical signal and local light to interfere with each other with a phase difference of ⁇ / 2.
  • a signal (Q x ) is generated.
  • the 90 ° optical hybrid 222 generates an optical signal (I y ) by causing the optical signal and local light to interfere with each other with a phase difference of 0, and causes the optical signal and local light to interfere with each other with a phase difference of ⁇ / 2. (Q y ) is generated.
  • E xin (t) indicates a signal transmitted from the light modulator 112
  • E yin (t) indicates a signal transmitted from the light modulator 114.
  • the first set of deviation compensation unit 232 and symbol identification unit 234 processes E xin (t).
  • the second set of deviation compensation unit 232 and symbol identification unit 234 processes E yin (t).
  • the optical fiber information management unit 310 includes the intensity peak value or PAPR of the polarization component corresponding to the optical signal generated by the optical modulation unit 112 in the extending direction of the optical fiber 300 among the transmission optical signals. And the intensity peak value or PAPR integrated value of the polarization component corresponding to the optical signal generated by the optical modulation unit 114 in the extending direction of the optical fiber 300 are stored. Then, the phase rotation setting device 320 controls the filter processing units 122 and 124 based on a value obtained by adding the integrated values of these two peak values (or PAPR). Here, the phase rotation setting device 320 may add these two values after multiplying the two integrated values by different coefficients. The phase rotation setting device 320 preferably controls the filter processing units 122 and 124 so that a value obtained by adding the two integrated values is minimized.
  • the same effect as that of the second embodiment can be obtained also in the polarization multiplexing optical communication system.
  • FIG. 9 is a diagram illustrating a configuration of an optical receiver 20 used in the optical communication system according to the fourth embodiment.
  • the optical receiver 20 according to the present embodiment has the same configuration as that of the optical receiver 20 according to the second embodiment, except that the chromatic dispersion compensation unit 228 also functions as the compensation unit 210.
  • the chromatic dispersion compensator 228 may also function as the compensator 210.
  • the magnitude of the phase rotation (that is, the magnitude of chromatic dispersion) applied by the filter processing sections 122 and 124 is equal to or less than the magnitude of chromatic dispersion that can be compensated by the chromatic dispersion compensating section 228.
  • the same effect as that of the second embodiment can be obtained. Further, since it is not necessary to provide the compensation unit 210, the structure of the optical receiver 20 can be simplified.
  • FIG. 10 is a diagram illustrating a configuration of an optical receiver 20 used in the optical communication system according to the fifth embodiment.
  • the optical receiving apparatus 20 according to the present embodiment has the same configuration as the optical receiving apparatus 20 according to the second embodiment, except that an optical dispersion compensation unit 236 is provided instead of the compensation unit 210.
  • the optical dispersion compensation unit 236 is, for example, a dispersion compensation fiber, and is a compensator that optically compensates for dispersion of light. Note that, also in the optical receiving device 20 according to the third embodiment, an optical dispersion compensation unit 236 may be provided instead of the compensation unit 210.
  • the same effect as that of the second embodiment can be obtained.
  • the phase rotation that is, chromatic dispersion
  • the digital processing circuit can be simplified.
  • FIG. 11 is a diagram illustrating a configuration of an optical communication system according to the sixth embodiment.
  • the optical communication system has a plurality of optical receivers 20.
  • the filter process part 120 changes the magnitude
  • the details of the configurations of the optical transmitter 10 and the optical receiver 20 are the same as those in any of the first to fifth embodiments.
  • the filter processing unit 120 varies the magnitude of the phase rotation depending on the optical receiver 20 that is the transmission destination, and therefore, even when transmitting the optical signal for transmission to any of the optical receivers 20 The same effects as those of the above-described embodiment can be obtained.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

Selon cette invention, une unité de génération de signaux optiques (110) génère des signaux optiques destinés à la transmission grâce à la modulation des porteuses sur la base de signaux à transmettre. Une unité de traitement par filtre (120) ajoute au signal destiné à la transmission, pour chaque fréquence porteuse, une rotation de phase dont l'ampleur est égale au carré de l'excursion de porteuse pour la fréquence concernée multiplié par la même constante (c'est-à-dire une ampleur proportionnelle à l'excursion). Un dispositif de réception par fibres optiques (20) possède une unité de compensation (210). Cette unité de compensation (210) compense ladite rotation de phase pour le signal généré à partir du signal optique destiné à la transmission.
PCT/JP2013/000387 2012-03-12 2013-01-25 Système de télécommunications par fibres optiques, dispositif de transmission par fibres optiques, dispositif de réception par fibres optiques, procédé de télécommunications par fibres optiques, procédé de transmission par fibres optiques, dispositif de fixation de rotation de phase et procédé de réception par fibres optiques WO2013136651A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012054097 2012-03-12
JP2012-054097 2012-03-12

Publications (1)

Publication Number Publication Date
WO2013136651A1 true WO2013136651A1 (fr) 2013-09-19

Family

ID=49160604

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/000387 WO2013136651A1 (fr) 2012-03-12 2013-01-25 Système de télécommunications par fibres optiques, dispositif de transmission par fibres optiques, dispositif de réception par fibres optiques, procédé de télécommunications par fibres optiques, procédé de transmission par fibres optiques, dispositif de fixation de rotation de phase et procédé de réception par fibres optiques

Country Status (1)

Country Link
WO (1) WO2013136651A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0774699A (ja) * 1993-09-03 1995-03-17 Hitachi Ltd 光伝送システム
JPH08288904A (ja) * 1995-04-11 1996-11-01 Nippon Telegr & Teleph Corp <Ntt> 光パルス伝送方式
JP2004125837A (ja) * 2002-09-30 2004-04-22 Mitsubishi Electric Corp 可変分散補償装置およびその電源回路
JP2006518579A (ja) * 2003-02-07 2006-08-10 フランス・テレコム 高速光伝送用の装置および方法、ならびに同装置および方法の使用
JP2008236512A (ja) * 2007-03-22 2008-10-02 Mitsubishi Electric Corp 分散予等化光送信器
JP2009296259A (ja) * 2008-06-04 2009-12-17 Sumitomo Electric Ind Ltd 光トランシーバ、及び、光伝送システム
WO2010140289A1 (fr) * 2009-06-05 2010-12-09 日本電気株式会社 Système de communication optique, son récepteur optique et son procédé de communication optique
JP2011142583A (ja) * 2010-01-08 2011-07-21 Fujitsu Ltd 光受信器および光受信方法
JP2011211516A (ja) * 2010-03-30 2011-10-20 Hitachi Ltd 光送信器、光送信方法、及び、光送受信システム

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0774699A (ja) * 1993-09-03 1995-03-17 Hitachi Ltd 光伝送システム
JPH08288904A (ja) * 1995-04-11 1996-11-01 Nippon Telegr & Teleph Corp <Ntt> 光パルス伝送方式
JP2004125837A (ja) * 2002-09-30 2004-04-22 Mitsubishi Electric Corp 可変分散補償装置およびその電源回路
JP2006518579A (ja) * 2003-02-07 2006-08-10 フランス・テレコム 高速光伝送用の装置および方法、ならびに同装置および方法の使用
JP2008236512A (ja) * 2007-03-22 2008-10-02 Mitsubishi Electric Corp 分散予等化光送信器
JP2009296259A (ja) * 2008-06-04 2009-12-17 Sumitomo Electric Ind Ltd 光トランシーバ、及び、光伝送システム
WO2010140289A1 (fr) * 2009-06-05 2010-12-09 日本電気株式会社 Système de communication optique, son récepteur optique et son procédé de communication optique
JP2011142583A (ja) * 2010-01-08 2011-07-21 Fujitsu Ltd 光受信器および光受信方法
JP2011211516A (ja) * 2010-03-30 2011-10-20 Hitachi Ltd 光送信器、光送信方法、及び、光送受信システム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
R. KILLEY: "Dispersion and nonlinearity compensation using electronic predistortion techniques", THE IEE SEMINAR ON OPTICAL FIBRE COMMUNICATIONS AND ELECTRONIC SIGNAL PROCESSING, 15 December 2005 (2005-12-15) *

Similar Documents

Publication Publication Date Title
JP5760419B2 (ja) 光送信装置および光送信方法
JP6319487B1 (ja) 光伝送特性推定方法、光伝送特性補償方法、光伝送特性推定システム及び光伝送特性補償システム
JP5850041B2 (ja) 光受信器、偏波分離装置、および光受信方法
WO2011052423A1 (fr) Emetteur optique de pré-égalisation et système de transmission par fibres optiques de pré-égalisation
JP2010050578A (ja) 歪補償器、光受信装置およびそれらの制御方法並びに光伝送システム
WO2018161355A1 (fr) Procédé d&#39;émission de signal, procédé de réception de signal, dispositif associé, et système
JP6107815B2 (ja) 光送信装置、光通信システム、光受信装置、光送信装置の調整方法、光送信方法、及び光受信方法
US9608732B2 (en) Optical transmitter, optical communication system, and optical communication method
JP2019041285A (ja) 光伝送特性補償システム及び光伝送特性補償方法
WO2014155775A1 (fr) Dispositif de traitement de signal, système de communication optique et procédé de traitement de signal
JP4905951B2 (ja) 光変調回路および光伝送システム
JP6418973B2 (ja) 分散補償方法および光信号送信機、光通信システム
US9722697B2 (en) Polarization division multiplexing optical communication reception device, polarization division multiplexing optical communication system, and polarization division multiplexing optical communication method
JP6355465B2 (ja) 光受信器、送受信装置、光通信システムおよび波形歪補償方法
WO2013136651A1 (fr) Système de télécommunications par fibres optiques, dispositif de transmission par fibres optiques, dispositif de réception par fibres optiques, procédé de télécommunications par fibres optiques, procédé de transmission par fibres optiques, dispositif de fixation de rotation de phase et procédé de réception par fibres optiques
WO2013140970A1 (fr) Système de communication optique et procédé de communication optique ayant une haute résistance de bruit de phase
WO2013136652A1 (fr) Système de télécommunications par fibres optiques, dispositif de transmission par fibres optiques, dispositif de réception par fibres optiques, procédé de télécommunications par fibres optiques, procédé de transmission par fibres optiques et procédé de réception par fibres optiques
JP2017195561A (ja) デジタル信号処理回路および複数のデジタル信号処理回路を含む信号処理装置
JP6116001B2 (ja) 光送信装置及び光受信装置
JP5182154B2 (ja) 光通信システム
Devi et al. 5× 222 Gb/s PM-16QAM Nyquist-WDM Superchannel
JP2016082347A (ja) 光送信器、光受信器及び光送受信方法
JP2010136146A (ja) 光受信装置
JP2007036785A (ja) 光伝送システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13761232

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13761232

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP