CN103840885A - High carrier frequency and high speed light millimeter wave generating and long-span transmission system - Google Patents
High carrier frequency and high speed light millimeter wave generating and long-span transmission system Download PDFInfo
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Abstract
本发明提出了一种高载频高速率光毫米波产生与长跨距传输系统，高载频40GHz，数据速率10Gbit/s，无中继长跨距84.7km。10Gbit/s NRZ电数据信号经由SHF803P放大后进入40G强度调制器，DFB激光90％的部分经偏振控制器同时进入该调制器，激光被电数据强度调制产生高速率调制光；该光谱90％部分经掺铒光纤放大器放大、XTM50滤波得到40GHz多倍时钟光谱，该时钟光谱与高速率调制光10％部分由VOA调整幅度后合路得到高速率光毫米波；光毫米波经KPS掺铒光纤放大器放大后进入近色散平坦光纤组传输，在远程基站拍频后形成电毫米波。本方法可拓展研究载频20GHz、30GHz、50GHz的高比特率光毫米波系统，可应用于微波光子学等领域。
The present invention proposes a high carrier frequency and high rate optical millimeter wave generation and long span transmission system, with a high carrier frequency of 40GHz, a data rate of 10Gbit/s, and a long span of 84.7km without repeaters. The 10Gbit/s NRZ electrical data signal enters the 40G intensity modulator after being amplified by SHF803P, and 90% of the DFB laser enters the modulator at the same time through the polarization controller, and the laser is modulated by the electrical data intensity to generate high-speed modulated light; 90% of the spectrum Amplified by an erbium-doped fiber amplifier and filtered by XTM50 to obtain a 40GHz multiple clock spectrum, the clock spectrum and 10% of the high-speed modulated light are combined by VOA to obtain a high-speed optical millimeter wave; the optical millimeter wave is passed through a KPS erbium-doped fiber amplifier After being amplified, it enters the near-dispersion flat optical fiber group for transmission, and forms an electrical millimeter wave after beating the frequency of the remote base station. This method can be expanded to study high-bit-rate optical millimeter-wave systems with carrier frequencies of 20GHz, 30GHz, and 50GHz, and can be applied to microwave photonics and other fields.
Description
Affiliated technical field
The present invention relates to a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system, can be applicable to the fields such as Microwave photonics, optical fiber communication, wireless optical fiber access.
Background technology
In recent years, the miscellaneous services such as large data, mobile traffic, broadband streaming media constantly increase severely, and High rate and large capacity wireless communication needs increases day by day.In order to realize wireless broadband communication, improve its operating frequency, the optical millimeter wave communication technology Radio-over-Fiber (RoF) that Fibre Optical Communication Technology and high frequency wireless access are merged should need and give birth to.At present, optical millimeter wave generation, transmission and reception technique have become the study hotspot of realizing ultra broadband access as a kind of emerging communication technology growing up.
In view of optical millimeter wave system is to device performance parameter, Fiber-optic parameter etc. require harsh, optical millimeter wave produces in experimental technique at present, mostly adopt data compared with low rate, the short situation of transmission single spanning distance, as NRZ optical millimeter wave signal 60GHz, 2.5Gbit/s, 50km[1Hongjun Zheng, Shanliang Liu, Xin Li, Weitao Wang, Zhen Tian.Generation and transmission simulation of60G millimeter-wave by using semiconductor optical amplifiers for radio-over-fiber systems.Optics Communications.282 (22): 4440-4444 (2009)], OFDM form optical millimeter wave signal 19GHz, 4Gbps, 50km[2C.Lin, Y.Lin, J. (J.) Chen, S.Dai, P.T.Shih, P.Peng, and S.Chi, " Optical direct-detection OFDM signal generation for radio-over-fiber link using frequency doubling scheme with carrier suppression, " Opt.Express16, 6056-6063 (2008)], OOK optical millimeter wave 60GHz and 56GHz, 1Gbps, 50km[3Liang Zhang, Ming Zhu, Chenhui Ye, Shu-Hao Fan, Cheng Liu, Xiaofeng Hu, Pan Cao, Qingjiang Chang, Yikai Su, and Gee-Kung Chang, " Generation and transmission of multiband and multi-gigabit60-GHz MMW signals in an RoF system with frequency quintupling technique, " Opt.Express21, 9899-9905 (2013)], OFDM optical millimeter wave 60GHz, 4.65Gbps × 8channels, 40km[4Li Tao, Jianjun Yu, Qi Yang, Yufeng Shao, Junwen Zhang, and Nan Chi, " A novel transform domain processing based channel estimation method for OFDM radio-over-fiber systems, " Opt.Express21, 7478-7487 (2013)].But China is vast in territory, populous, information communication demand rapid growth, high bit rate optical millimeter wave produces with the demand of long span transmission and becomes day by day urgent.
Content of the patent
In the day by day urgent situation of optical millimeter wave two-forty, long span demand, the present invention proposes a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system, system high carrier frequency 40GHz, data high-speed rate 10Gbit/s, long span 84.7km; Adjustment System parameter, carrier frequency can be extended to 20GHz, 30GHz, 50GHz.
The technical solution adopted for the present invention to solve the technical problems is:
For 40GHz, 10Gbit/s high rate optical millimeter-wave systems, the present invention proposes a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system, intend the technical scheme adopting: the 10Gbit/s two-forty NRZ pseudo-random pulse sequence electrical data signal number that Agilent 43Gbit/s Error Detector 81250 is exported is amplified into 40G high-speed wideband intensity modulator MOD via broadband electric amplifier SHF803P; The laser that narrow linewidth Distributed Feedback Laser produces is after 10:90 splitter OC1 shunt, and wherein 10% laser can be used for producing long-range trimmed book vibration source, does not discuss herein; Wherein 90% laser enters 40G high-speed wideband intensity modulator MOD through optical polarization controller PC simultaneously; Narrow-linewidth laser is produced two-forty wide-band modulation light by electric intensity data modulation, here the two-forty wide-band modulation light producing can be that this system produces optical millimeter wave and long-range light generation source simultaneously as the part of descending optical millimeter wave signal along separate routes, but only discuss the optical millimeter wave situation that produces here; Two-forty wide-band modulation light by 10:90 splitter OC2 along separate routes after, wherein 90% light wave is amplified into optical filter XTM50 through erbium-doped optical fiber amplifier EDFA 1, after filtering, obtain many times of clock spectrum of 40GHz, 10% the laser spectroscopy that this clock spectrum and splitter OC2 separate obtains high rate optical millimeter wave after being adjusted by adjustable optical attenuator VOA behind 50:50 mixer OC3He road; Optical millimeter wave is amplified into nearly Dispersion Flattened Fiber group Fiber transmission, single spanning distance Transmission Fibers group length 84.7km (being connected to form by G655 optical fiber 8.47km and Dispersion Flattened Fiber 76.23km) through KPS erbium-doped fiber amplifier; Optical millimeter wave forms electric millimeter-wave signal after arriving remote base stations beat frequency.Adopt spectrometer AQ6319, oscilloscope DSA8300 to carry out measure spectrum, eye pattern information in the access of light path link wire jumper.
The invention has the beneficial effects as follows:
In 40GHz, 10Gbit/s high rate optical millimeter-wave systems, the present invention proposes a kind of high carrier frequency high rate optical millimeter wave and produce and long span transmission system; Adopt same DFB LASER Light Source to produce high rate optical millimeter wave and long-range trimmed book vibration source simultaneously, can effectively suppress phase noise; The laser adopting has the performance such as narrow linewidth, high side mode suppression ratio, effectively inhibition strength noise; Adopt 10Gbit/s high data rate to go intensity modulated DFB laser can improve data rate by a broadband intensity modulator.Adopt the nearly Dispersion Flattened Fiber group of G655 and Dispersion Flattened Fiber composition to transmit, can effectively improve signal input power and reduce full span dispersion, improve transmission performance; With adopt radio frequency and baseband signal respectively phase modulation and intensity two kinds produce optical millimeter wave methods and compare, the present invention can produce high rate optical millimeter wave and long-range trimmed book vibration source simultaneously, optical millimeter wave produces and transmission plan novelty, span are long.This patent method and apparatus can be used as the important references of exploratory development high bit rate optical millimeter wave system, can be applicable to the field such as Microwave photonics, optical fiber communication.
Brief description of the drawings
Fig. 1 is that a kind of high carrier frequency high rate optical millimeter wave produces and long span transmission system installation drawing.The 1st, Agilent 43Gbit/s Error Detector 81250, the 2nd, broadband electric amplifier SHF803P, the 3rd, 40G high-speed wideband intensity modulator MOD, the 4th, narrow linewidth Distributed Feedback Laser, the 5th, 10:90 splitter OC1, the 6th, optical polarization controller PC, the 7th, be 10:90 splitter OC2, the 8th, erbium-doped optical fiber amplifier EDFA 1,9th, optical filter XTM50, the 10th, adjustable optical attenuator VOA, the 11st, 50:50 mixer OC3, the 12nd, KPS erbium-doped fiber amplifier, the 13rd, nearly Dispersion Flattened Fiber group Fiber, the 14th, spectrometer AQ6319, the 15th, oscilloscope DSA8300.
Fig. 2 is two-forty wide-band modulation spectrum (a) and the eye pattern (b) thereof obtaining.
Fig. 3 is (KPS pumping current I after KPS erbium-doped fiber amplifier amplifies
p=0.4A) optical millimeter wave.
Fig. 4 is the eye pattern of two-forty wide-band modulation light after nearly dispersion flattene Optical Fiber Transmission 84.7km, and Fig. 4 (a) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A), Fig. 4 (b) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.6A).
Fig. 5 is the spectrum of optical millimeter wave after nearly dispersion flattene Optical Fiber Transmission 84.7km, is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A)
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described with enforcement.
Shown in Fig. 1, the 10Gbit/s two-forty NRZ pseudo-random pulse sequence electrical data signal number of Agilent 43Gbit/s Error Detector 81250 (1) outputs is amplified into 40G high-speed wideband intensity modulator MOD (3) via broadband electric amplifier SHF803P (2); The laser that narrow linewidth Distributed Feedback Laser (4) produces is after 10:90 splitter OC1 (5) shunt, and wherein 10% laser can be used for producing long-range trimmed book vibration source, does not discuss herein; Wherein 90% laser enters 40G high-speed wideband intensity modulator MOD through optical polarization controller PC (6) simultaneously; Narrow-linewidth laser is produced two-forty wide-band modulation light by electric intensity data modulation, here the two-forty wide-band modulation light producing can be that this system produces optical millimeter wave and long-range light generation source simultaneously as the part of descending optical millimeter wave signal along separate routes, but only discuss the optical millimeter wave situation that produces here; Two-forty wide-band modulation light by 10:90 splitter OC2 (7) along separate routes after, wherein 90% light wave is amplified into optical filter XTM50 (9) through erbium-doped optical fiber amplifier EDFA 1 (8), after filtering, obtain many times of clock spectrum of 40GHz, 10% the laser spectroscopy that this clock spectrum and splitter OC2 separate obtains high rate optical millimeter wave after being adjusted by adjustable optical attenuator VOA (10) after 50:50 mixer OC3 (11) closes road; Optical millimeter wave is amplified into nearly Dispersion Flattened Fiber group Fiber (13) transmission, single spanning distance Transmission Fibers group length 84.7km (being connected to form by G655 optical fiber 8.47km and Dispersion Flattened Fiber 76.23km) through KPS erbium-doped fiber amplifier (12); Optical millimeter wave arrives the electric millimeter-wave signal forming after remote base stations beat frequency.Finally, adopt spectrometer AQ6319 (14) to carry out spectral detection analyzing and processing to signal transmission characteristics.The optical patchcord of connection spectrometer AQ6319 input port can directly be received oscilloscope DSA8300 (15) after pulling up and go to measure the characteristics such as eye pattern.Other light path links also can wire jumper access be carried out measure spectrum, eye pattern information.
Fig. 2 is two-forty wide-band modulation spectrum (a) and the eye pattern (b) thereof obtaining.What dotted ellipse indicated in Fig. 2 (a) is the clock spectrum of 40GHz, to its amplification, filtering and close the processing such as ripple with main ripple and can obtain optical millimeter wave; Fig. 2 (b) is visible, and eye pattern is clear, eyelid is thin, opening width is good.
Fig. 3 is (KPS pumping current I after KPS erbium-doped fiber amplifier amplifies
p=0.4A) optical millimeter wave.Visible, optical millimeter wave spectrum is clear, and data center's spectrum and clock spectrum interval are stabilized in 40GHZ (0.319nm), after two spectrum beat frequencies, is electric millimeter wave, carrier frequency 40GHz, data rate 10Gbps; Two spectrum peak value differences are 3.9dBm; Can be by regulating the passband centre wavelength of filter XTM50, two spectrum intervals can be extended to 20GHz, 30GHz, 50GHz; The adjusting that regulates erbium-doped optical fiber amplifier EDFA 1, filter XTM50 bandwidth, adjustable attenuator can realize two spectrum peaks changes.
Fig. 4 is the eye pattern of two-forty wide-band modulation light after nearly dispersion flattene Optical Fiber Transmission 84.7km, and Fig. 4 (a) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A), Fig. 4 (b) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.6A).Fig. 4 (a) is visible, the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A) time, the eye pattern after transmission is better, but poorer than eye pattern before transmission, and eyelid thickening, shake become large; Fig. 4 (b) is visible, and Fig. 4 (b) is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.6A) under, eye pattern and I after transmission
prelatively, eyelid is thicker, eye opening is irregular for Fig. 4 (a) of=0.4A situation.This shows, is not that KPS erbium-doped fiber amplifier pumping current is the bigger the better, and is not that power is the bigger the better.
Fig. 5 is the spectrum of optical millimeter wave after nearly dispersion flattene Optical Fiber Transmission 84.7km, is the situation (I that only has KPS erbium-doped fiber amplifier to amplify
p=0.4A), visible, due to the loss of long span optical fiber, after transmission, spectrum is slightly poorer than the spectrum (Fig. 3) before transmitting, optical power down; But still can keep good definition.
Claims (1)
1. high carrier frequency high rate optical millimeter wave produces and a long span transmission system, it is characterized in that: the 10Gbit/s two-forty NRZ pseudo-random pulse sequence electrical data signal number of Agilent Error Detector 81250 (1) outputs is amplified into 40G high-speed wideband intensity modulator MOD (3) via broadband electric amplifier SHF803P (2); The laser that narrow linewidth Distributed Feedback Laser (4) produces is after 10:90 splitter OC1 (5) shunt, and wherein 10% laser can be used for producing long-range trimmed book vibration source, does not discuss herein; Wherein 90% laser enters 40G high-speed wideband intensity modulator MOD through optical polarization controller PC (6) simultaneously; Narrow-linewidth laser is produced two-forty wide-band modulation light by electric intensity data modulation, two-forty wide-band modulation light by 10:90 splitter OC2 (7) along separate routes after, wherein 90% light wave is amplified into optical filter XTM50 (9) through erbium-doped optical fiber amplifier EDFA 1 (8), after filtering, obtain many times of clock spectrum of 40GHz, 10% the laser spectroscopy that this clock spectrum and splitter OC2 separate obtains high rate optical millimeter wave after being adjusted by adjustable optical attenuator VOA (10) after 50:50 mixer OC3 (11) closes road; Optical millimeter wave is amplified into nearly Dispersion Flattened Fiber group Fiber (13) transmission through KPS erbium-doped fiber amplifier (12), single spanning distance Transmission Fibers group length 84.7km, wherein optical fiber group is connected to form by G655 optical fiber 8.47km and Dispersion Flattened Fiber 76.23km; Optical millimeter wave arrives the electric millimeter-wave signal forming after remote base stations beat frequency; Adopt spectrometer AQ6319 (14) to carry out spectral detection analyzing and processing to signal transmission characteristics; The optical patchcord of connection spectrometer AQ6319 input port can directly be received oscilloscope DSA8300 (15) after pulling up and go to measure the characteristics such as eye pattern; Other light path links also can wire jumper access be carried out measure spectrum, eye pattern information; Can expand the high bit rate optical millimeter wave system of research carrier frequency 20GHz, 30GHz, 50GHz.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110429979A (en) * | 2019-06-21 | 2019-11-08 | 南方科技大学 | Data transmission method, device, equipment and storage medium |
| CN112217572A (en) * | 2020-10-13 | 2021-01-12 | 聊城大学 | A Multi-Carrier Generation System Based on Two-Level Modulation |
| CN112217566A (en) * | 2020-10-22 | 2021-01-12 | 聊城大学 | A Remote High-Frequency Microwave Oscillator System Based on Single-Stage Nonlinear Spectral Spreading |
| CN112272059A (en) * | 2020-10-29 | 2021-01-26 | 聊城大学 | A Remote High-Frequency Microwave Oscillator System Based on Two-Stage Nonlinear Spread Spectrum |
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| CN103475416A (en) * | 2012-06-06 | 2013-12-25 | 中国联合网络通信集团有限公司 | Central station, and method and system for downlink signal processing based on millimeter wave communication |
| CN103490817A (en) * | 2013-09-30 | 2014-01-01 | 中国人民解放军理工大学 | Photonic generation device for high-frequency microwaves and millimeter waves and feeding method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110429979A (en) * | 2019-06-21 | 2019-11-08 | 南方科技大学 | Data transmission method, device, equipment and storage medium |
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| CN112217572A (en) * | 2020-10-13 | 2021-01-12 | 聊城大学 | A Multi-Carrier Generation System Based on Two-Level Modulation |
| CN112217572B (en) * | 2020-10-13 | 2023-09-12 | 聊城大学 | A multi-carrier generation system based on two-level modulation |
| CN112217566A (en) * | 2020-10-22 | 2021-01-12 | 聊城大学 | A Remote High-Frequency Microwave Oscillator System Based on Single-Stage Nonlinear Spectral Spreading |
| CN112217566B (en) * | 2020-10-22 | 2023-09-08 | 聊城大学 | Remote high-frequency microwave oscillation source system based on single-stage nonlinear spectrum expansion |
| CN112272059A (en) * | 2020-10-29 | 2021-01-26 | 聊城大学 | A Remote High-Frequency Microwave Oscillator System Based on Two-Stage Nonlinear Spread Spectrum |
| CN112272059B (en) * | 2020-10-29 | 2023-09-29 | 聊城大学 | Remote high-frequency microwave oscillation source system based on two-stage nonlinear spread spectrum |
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