EP1695463A4 - Continuously tunable coupled opto-electronic oscillators having balanced opto-electronic filters - Google Patents
Continuously tunable coupled opto-electronic oscillators having balanced opto-electronic filtersInfo
- Publication number
- EP1695463A4 EP1695463A4 EP04817932.9A EP04817932A EP1695463A4 EP 1695463 A4 EP1695463 A4 EP 1695463A4 EP 04817932 A EP04817932 A EP 04817932A EP 1695463 A4 EP1695463 A4 EP 1695463A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- opto
- electronic
- balanced
- oscillators
- continuously tunable
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B17/00—Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08013—Resonator comprising a fibre, e.g. for modifying dispersion or repetition rate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08018—Mode suppression
- H01S3/08022—Longitudinal modes
- H01S3/08031—Single-mode emission
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/083—Ring lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/107—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using electro-optic devices, e.g. exhibiting Pockels or Kerr effect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1307—Stabilisation of the phase
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
- H01S5/06226—Modulation at ultra-high frequencies
- H01S5/0623—Modulation at ultra-high frequencies using the beating between two closely spaced optical frequencies, i.e. heterodyne mixing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/14—External cavity lasers
- H01S5/141—External cavity lasers using a wavelength selective device, e.g. a grating or etalon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S2302/00—Amplification / lasing wavelength
- H01S2302/02—THz - lasers, i.e. lasers with emission in the wavelength range of typically 0.1 mm to 1 mm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08086—Multiple-wavelength emission
- H01S3/0809—Two-wavelenghth emission
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10069—Memorized or pre-programmed characteristics, e.g. look-up table [LUT]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/006—Devices for generating or processing an RF signal by optical means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Lasers (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US52599203P | 2003-12-01 | 2003-12-01 | |
US59919804P | 2004-08-05 | 2004-08-05 | |
US10/963,755 US7187870B2 (en) | 2003-10-15 | 2004-10-12 | Tunable balanced opto-electronic filters and applications in opto-electronic oscillators |
PCT/US2004/040301 WO2005055412A2 (en) | 2003-12-01 | 2004-12-01 | Continuously tunable coupled opto-electronic oscillators having balanced opto-electronic filters |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1695463A2 EP1695463A2 (en) | 2006-08-30 |
EP1695463A4 true EP1695463A4 (en) | 2014-07-09 |
Family
ID=34657971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04817932.9A Withdrawn EP1695463A4 (en) | 2003-12-01 | 2004-12-01 | Continuously tunable coupled opto-electronic oscillators having balanced opto-electronic filters |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1695463A4 (en) |
CA (1) | CA2547966C (en) |
WO (1) | WO2005055412A2 (en) |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7389053B1 (en) | 2003-10-15 | 2008-06-17 | Oewaves, Inc. | Tunable filtering of RF or microwave signals based on optical filtering in Mach-Zehnder configuration |
US7587144B2 (en) | 2004-01-12 | 2009-09-08 | Oewaves, Inc. | Tunable radio frequency and microwave photonic filters |
US7356214B2 (en) | 2004-03-22 | 2008-04-08 | Oewaves, Inc. | Optical waveguide coupler for whispering-gallery-mode resonators |
US7362927B1 (en) | 2004-06-01 | 2008-04-22 | Oewaves, Inc. | Tunable RF or microwave photonic filters using temperature-balanced whispering gallery mode optical resonators |
US7480425B2 (en) | 2004-06-09 | 2009-01-20 | Oewaves, Inc. | Integrated opto-electronic oscillators |
US7260279B2 (en) | 2004-06-09 | 2007-08-21 | Oewaves, Inc. | Integrated opto-electronic oscillators |
US7630417B1 (en) | 2004-06-24 | 2009-12-08 | California Institute Of Technology | Crystal whispering gallery mode optical resonators |
US7440651B1 (en) | 2004-11-17 | 2008-10-21 | California Institute Of Technology | Single mode whispering-gallery-mode resonator |
US7634201B2 (en) | 2006-09-05 | 2009-12-15 | Oewaves, Inc. | Wideband receiver based on photonics technology |
US8124927B2 (en) | 2007-05-29 | 2012-02-28 | California Institute Of Technology | Detecting light in whispering-gallery-mode resonators |
CA2690338C (en) | 2007-06-13 | 2015-03-24 | Oewaves, Inc. | Tunable lasers locked to whispering gallery mode resonators |
US7965745B2 (en) | 2007-06-13 | 2011-06-21 | Oewaves, Inc. | RF and microwave receivers based on electro-optic optical whispering gallery mode resonators |
US7929589B1 (en) | 2007-06-13 | 2011-04-19 | Oewaves, Inc. | Diffractive grating coupled whispering gallery mode resonators |
US8164816B1 (en) | 2007-08-31 | 2012-04-24 | California Institute Of Technology | Stabilizing optical resonators |
US8210044B1 (en) | 2007-10-12 | 2012-07-03 | California Institute Of Technology | Covert laser remote sensing and vibrometry |
US9360626B2 (en) | 2007-11-13 | 2016-06-07 | Anatoliy Savchenkov | Fiber-based multi-resonator optical filters |
US8155914B2 (en) | 2007-11-13 | 2012-04-10 | Oewaves, Inc. | Measuring phase noise in radio frequency, microwave or millimeter signals based on photonic delay |
US8155913B2 (en) | 2007-11-13 | 2012-04-10 | Oewaves, Inc. | Photonic-based cross-correlation homodyne detection with low phase noise |
US7801189B2 (en) | 2007-11-13 | 2010-09-21 | Oewaves, Inc. | Cross modulation-based opto-electronic oscillator with tunable electro-optic optical whispering gallery mode resonator |
US8111722B1 (en) | 2008-03-03 | 2012-02-07 | Oewaves, Inc. | Low-noise RF oscillation and optical comb generation based on nonlinear optical resonator |
CN102007652A (en) | 2008-03-11 | 2011-04-06 | 光电波股份有限公司 | Optical locking based on optical resonators with high quality factors |
US8089684B1 (en) | 2008-03-14 | 2012-01-03 | Oewaves, Inc. | Photonic RF and microwave phase shifters |
WO2009137202A2 (en) | 2008-04-03 | 2009-11-12 | California Institute Of Technology | Optical sensing based on overlapping optical modes in optical resonator sensors and interferometric sensors |
US8102597B1 (en) | 2008-05-15 | 2012-01-24 | Oewaves, Inc. | Structures and fabrication of whispering-gallery-mode resonators |
US8094359B1 (en) | 2008-05-15 | 2012-01-10 | Oewaves, Inc. | Electro-optic whispering-gallery-mode resonator devices |
US8452139B1 (en) | 2008-07-25 | 2013-05-28 | Oewaves, Inc. | Wide-band RF photonic receivers and other devices using two optical modes of different quality factors |
US8331008B1 (en) | 2008-10-14 | 2012-12-11 | Oewaves, Inc. | Photonic microwave and RF receivers based on electro-optic whispering-gallery-mode resonators |
US8159736B2 (en) | 2008-11-13 | 2012-04-17 | Oewaves, Inc. | Tunable single sideband modulators based on electro-optic optical whispering gallery mode resonators and their applications |
US8761603B1 (en) | 2009-02-25 | 2014-06-24 | Oewaves, Inc. | Dynamically reconfigurable sensor arrays |
US8498539B1 (en) | 2009-04-21 | 2013-07-30 | Oewaves, Inc. | Dielectric photonic receivers and concentrators for radio frequency and microwave applications |
US8417076B2 (en) | 2009-06-22 | 2013-04-09 | Oewaves, Inc. | Tunable photonic microwave or radio frequency receivers based on electro-optic optical whispering gallery mode resonators |
US8331409B1 (en) | 2010-01-18 | 2012-12-11 | Oewaves, Inc. | Locking of a laser to an optical interferometer that is stabilized to a reference frequency |
US8564869B1 (en) | 2010-07-15 | 2013-10-22 | Oewaves, Inc. | Voltage controlled tunable single sideband modulators and devices based on electro-optic optical whispering gallery mode resonators |
CN202373845U (en) | 2010-08-10 | 2012-08-08 | Oe电波公司 | Self-injection locking of feedback enhancement of laser to optical resonator |
EP2710694B1 (en) | 2011-05-16 | 2018-07-04 | Oewaves, Inc. | Generation of single optical tone, rf oscillation signal and optical comb in a triple-oscillator device based on nonlinear optical resonator |
WO2012177805A2 (en) | 2011-06-20 | 2012-12-27 | Oewaves, Inc. | Stabilizing rf oscillator based on optical resonator |
WO2012178200A1 (en) | 2011-06-23 | 2012-12-27 | Oewaves, Inc. | Parametric regenerative oscillators based on opto-electronic feedback and optical regeneration via nonlinear optical mixing in whispering gallery mode optical resonators |
JP5998214B2 (en) | 2011-06-30 | 2016-09-28 | オーイーウェイブス,インコーポレーテッド | Compact optical atomic clock and applications based on parametric nonlinear optical mixing in whispering gallery mode optical resonators |
CN104272538B (en) * | 2012-03-27 | 2017-03-01 | 光电波股份有限公司 | There is the tunable optical electrical oscillator of the optical resonance wave filter running on selected modulation sideband, |
SI24591A (en) * | 2013-12-24 | 2015-06-30 | Center Odliäśnosti Za Biosenzoriko, Instrumentacijo In Procesno Kontrolo | The process control and stabilization of the optoelectronic oscillator frequency |
US10585332B2 (en) * | 2018-03-06 | 2020-03-10 | University Of Central Florida Research Foundation, Inc. | Periodic optical filter stabilized tunable comb generator |
CN110045357B (en) * | 2019-03-07 | 2022-12-06 | 南京合太光电科技有限公司 | Linear frequency modulation signal generating device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5723856A (en) * | 1995-08-01 | 1998-03-03 | California Institute Of Technology | Opto-electronic oscillator having a positive feedback with an open loop gain greater than one |
US6567436B1 (en) * | 1999-01-26 | 2003-05-20 | California Institute Of Technology | Opto-electronic oscillators having optical resonators |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6594061B2 (en) * | 2000-06-09 | 2003-07-15 | California Institute Of Technology | Acceleration-insensitive opto-electronic oscillators |
US6906309B2 (en) * | 2001-11-15 | 2005-06-14 | Hrl Laboratories, Llc | Injection-seeding of a multi-tone photonic oscillator |
-
2004
- 2004-12-01 EP EP04817932.9A patent/EP1695463A4/en not_active Withdrawn
- 2004-12-01 WO PCT/US2004/040301 patent/WO2005055412A2/en active Application Filing
- 2004-12-01 CA CA2547966A patent/CA2547966C/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5723856A (en) * | 1995-08-01 | 1998-03-03 | California Institute Of Technology | Opto-electronic oscillator having a positive feedback with an open loop gain greater than one |
US6567436B1 (en) * | 1999-01-26 | 2003-05-20 | California Institute Of Technology | Opto-electronic oscillators having optical resonators |
Non-Patent Citations (3)
Title |
---|
BAMDAD BAKHSHI ET AL: "Dual-Wavelength 10-GHz Actively Mode-Locked Erbium Fiber Laser", IEEE PHOTONICS TECHNOLOGY LETTERS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 11, no. 11, 1 November 1999 (1999-11-01), XP011046809, ISSN: 1041-1135 * |
KAZI SARWAR ABEDIN ET AL: "ACTIVE STABILIZATION OF A HIGHER-ORDER MODE-LOCKED FIBER LASER OPERATING AT A PULSE-REPETITION RATE OF 154 GHZ", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, US, vol. 26, no. 3, 1 February 2001 (2001-02-01), pages 151 - 153, XP001038934, ISSN: 0146-9592 * |
YAO X S ET AL: "Coupled optoelectronic oscillators for generating both RF signal and optical pulses", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 18, no. 1, 1 January 2000 (2000-01-01), pages 73 - 78, XP011450429, ISSN: 0733-8724, DOI: 10.1109/50.818909 * |
Also Published As
Publication number | Publication date |
---|---|
EP1695463A2 (en) | 2006-08-30 |
CA2547966C (en) | 2010-08-17 |
WO2005055412A2 (en) | 2005-06-16 |
CA2547966A1 (en) | 2005-06-16 |
WO2005055412A3 (en) | 2005-10-13 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20060630 |
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AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ELIYAHU, DANNY Inventor name: ILCHENKO, VLADIMIR |
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DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20140611 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: H01S 5/14 20060101ALI20140605BHEP Ipc: H01S 3/08 20060101ALI20140605BHEP Ipc: H04B 10/50 20130101ALI20140605BHEP Ipc: G02B 6/12 20060101ALI20140605BHEP Ipc: H03B 17/00 20060101ALI20140605BHEP Ipc: H01S 3/107 20060101ALI20140605BHEP Ipc: H04B 10/58 20130101ALI20140605BHEP Ipc: H01S 5/062 20060101ALI20140605BHEP Ipc: H01S 3/13 20060101ALI20140605BHEP Ipc: H04B 10/85 20130101ALI20140605BHEP Ipc: H01S 3/083 20060101ALI20140605BHEP Ipc: H04B 10/00 20130101AFI20140605BHEP Ipc: H01S 5/0687 20060101ALI20140605BHEP Ipc: H01S 3/10 20060101ALI20140605BHEP Ipc: G02F 1/01 20060101ALI20140605BHEP |
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17Q | First examination report despatched |
Effective date: 20170313 |
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Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20170725 |