WO2005089516B1 - Flat-topped chirp induced by optical filter edge - Google Patents

Flat-topped chirp induced by optical filter edge

Info

Publication number
WO2005089516B1
WO2005089516B1 PCT/US2005/009399 US2005009399W WO2005089516B1 WO 2005089516 B1 WO2005089516 B1 WO 2005089516B1 US 2005009399 W US2005009399 W US 2005009399W WO 2005089516 B1 WO2005089516 B1 WO 2005089516B1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
profile
optical spectrum
optical
instantaneous
Prior art date
Application number
PCT/US2005/009399
Other languages
French (fr)
Other versions
WO2005089516A3 (en
WO2005089516A9 (en
WO2005089516A2 (en
Inventor
Daniel Mahgerefteh
Yasushiro Matsui
Parviz Tayebati
Xueyan Zheng
Original Assignee
Azna Llc
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 Azna Llc filed Critical Azna Llc
Priority to CN2005800152450A priority Critical patent/CN1998165B/en
Priority to CA2561128A priority patent/CA2561128C/en
Priority to EP05731268.8A priority patent/EP1730860B1/en
Publication of WO2005089516A2 publication Critical patent/WO2005089516A2/en
Publication of WO2005089516A9 publication Critical patent/WO2005089516A9/en
Publication of WO2005089516A3 publication Critical patent/WO2005089516A3/en
Publication of WO2005089516B1 publication Critical patent/WO2005089516B1/en

Links

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
    • H04B10/58—Compensation for non-linear transmitter output
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
    • H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
    • H04B10/25137—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion using pulse shaping at the transmitter, e.g. pre-chirping or dispersion supported transmission [DST]
    • 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
    • H04B10/508—Pulse generation, e.g. generation of solitons

Abstract

A fiber optic communication system comprising: an optical signal source adapted to produce a binary amplitude modulated signal; and an optical spectrum reshaper adapted to receive the amplitude modulated signal (fig.3) and to change the instantaneous frequency of the signal at its 0-to-1 and 1-to-0 transitions so as to change the instantaneous frequency of the signal so that it is substantially constant across the 1 pulse. A method for transmitting a signal through a fiber, comprising: generating a second signal from the signal,wherein the second signal comprises a intensity profile and an adiabatic frequency profile; generating a third signal from the second signal, wherein the third signal comprises a intensity profile and a flat-topped frequency profile (fig.1).

Claims

45
What Is Claimed Is:
1. A fiber optic communicat: on system comprising: an optical signal source a iapted to produce a binary amplitude modulated sign al; and an optical spectrum reshap BΓ adapted to receive the amplitude modulated signal and to change the instantaneous frequency of the signal at its 0-to-l and l-to-0 transitions so as tc change the instantaneous frequency of the signal so that it is substantially constant across t n.e 1 pulse.
2. A system according :o claim 1 wherein the changes in the instantanec as frequency are in proportion to the absolute value of the first derivative of the temporal p. ofile of the amplitude modulated signal.
3. A system according tc claim 1 wherein the change in the instantaneous fre guency from the 0-to-l 46
transition is the same as the dltiange in the instantaneous
Figure imgf000003_0001
frequency from th|= l-to-0 transition.
4. A system according tc claim 1 wherein the change in the instantaneous fre guency from the 0-to-l transition is different from th a change in the instantaneous frequency from th 2 l-to-0 transition.
5. A system according tc claim 1 wherein the signal source is a directly mod αlated semiconductor laser.
6. A system according toll claim 5 wherein the optical signal source is a distributed feedback laser.
7. A system according to claim 6 wherein the distributed feedback laser is b iased high above its threshold current.
8. A system according toll claim 5 wherein the signal source is a tunable DBR Laser. 47
9. A system according tc claim 1 wherein the signal source is a fast tunable semiconductor laser,
10. A system according tc claim 1 wherein the optical spectrum reshaper is tt e transmission edge of an optical band pass filter.
11. A system according tc claim 1 wherein the optical spectrum reshaper is ar edge filter.
12. A system according tc claim 1 wherein the optical spectrum reshaper is t. e transmission edge of a fiber Bragg grating filter.
13. A system according tc claim 1 wherein the optical spectrum reshaper is ti e transmission edge. of a multicavity etalon filter.
14. A system according tc claim 1 wherein the optical spectrum reshaper is tl e transmission edge of a single cavity filter.
15. A system according tc claim 1 wherein the optical spectrum reshaper is ti transmission edge of a cascade of micro ring resonators
16. A system according tc claim 1 wherein the optical spectrum reshaper is tt e transmission edge of an arrayed waveguide grating.
17. A system according tc claim 1 wherein the optical spectrum reshaper is th transmission edge of echelle grating.
18. A system according to claim 1 wherein the optical spectrum reshaper is th 5 transmission edge of a Bessel filter. 49
19. A system according tc claim 1 wherein the optical spectrum reshaper is tl e transmission edge of a Mach-Zhender interferometer.
20. A system according tc claim 1 wherein the optical spectrum reshaper is ac|apted to change the instantaneous frequency of the signal so that it is substantially square-shaped, wi th rabbit ears at the 0-to-l and l-to-0 transitions.
21. A fiber optic communi :ation system comprising: an optical signal source dapted to produce a binary amplitude modulated sign al having a first adiabatic instantaneous frequer :y profile; and an optical spectrum reshap :r adapted to receive the signal and change the firs adiabatic instantaneous frequency profil to a second substantially flat-topped instc itaneous frequency profile. 50
22. A system according tc claim 21 wherein the optical spectrum reshaper is ac apted to change the first adiabatic instantaneous ϊ requency profile to a second substantially square-sh; ped instantaneous frequency profile with rabbit ars at the leading and trailing edges of the pulse.
23. A system according tc claim 21 wherein the rise and fall times of the secc nd substantially flat- topped instantaneous frequency profile are shorter than the corresponding rise anc fall times of the first adiabatic instantaneous f requency profile.
24. A system according t claim 21 wherein the duration of the second substant .ally flat-topped instantaneous frequency profil is shorter than the duration of the first adiabatic instantaneous frequency profile.
25. A system according to claim 21 wherein the duration of the second substant ally flat-topped 51
instantaneous frequency profile is longer than the duration of the first adiabatic instantaneous frequency profile.
26. A system according t claim 21 wherein the first adiabatic instantaneous i equency profile is phase shifted relative to the t nary signal amplitude profile .
27. A system according to claim 21 wherein the optical spectrum reshaper is ch aracterized by a slope of its optical transmission ver 3us optical frequency profile.
28. A system according to claim 27 wherein said slope is between 2 dB/GHz and dB/GHz, and the bit rate of the binary amplitude mo iulated signal is about 10 Gb/sec. 52
Figure imgf000009_0001
53
33. A fiber optic communj||cation system comprising: an optical signal source ddapted to receive a base signal and produce an amplitude modulated first signal having a first adiabatib instantaneous frequency profile; and an optical spectrum reshapj 2r adapted to convert said first signal to a second s Lgnal, wherein said second signal has a substantial Ly flat-topped instantaneous frequency profile1
34. A system according to claim 33 wherein said second signal further has a larger amplitude modulation than said first signal.
35. A system according to claim 33 wherein the second signal has an extinction! ratio is between 10 dB and 15 dB.
36. A system according to claim 33 wherein said base signal is a non-return-to-|ero (NRZ) signal. 54
37. A system according tc claim 33 wherein said digital signal is a return-to-∑ ro (RZ) signal.
38. A system according tc claim 36 wherein the product of the flat-topped inst ntaneous frequency excursion and 0 bit duration of the instantaneous frequency of said second signal is substantially equal to an odd integer multiple of 0 5.
39. A system according to claim 36 wherein the product of the flat-topped inst ntaneous frequency excursion and 0 bit duration of the instantaneous frequency of said second signal is between an odd integer multiple of a fraction between 0.25 and 0.75.
40. A fiber optic communi ;ation system comprising: an optical signal source a lapted to receive a base signal and produce an ampl .tude modulated first signal; and 55
an optical spectrum resharaer adapted to convert said first signal to an amplitude modulated second signal, wherein the rise and faill times of the second signal are correspondingly fasti >r than the rise and fall times of the first signal.
41. A fiber optic communi :ation system comprising: an optical signal source al .apted to receive a base signal and produce an ampl .tude modulated first signal having a first adiabatic] instantaneous frequency profile; and an optical spectrum reshap ■T adapted to convert said first signal to an amplitu .e modulated second signal having a second instanta .eous frequency profile, wherein the rise and f 11 times of the amplitude of second signal are :orrespondingly faster than the rise and fall times of the amplitude of the first signal. 56
42. A method for transmitting a signal through a fiber, comprising: generating a second signal] from the signal, wherein the second signal compa ises a intensity profile and an adiabatic freque ncy profile; generating a third signal from the second signal, wherein the third signal compri ses a intensity profile and a flat-topped frequency prc file.
43. A method according to claim 42 wherein the frequency profile of the third signal is substantially temporally encompassed by the i itensity profile of the third signal,
44. A method according to claim 42 wherein the intensity profile of the third |ignal is substantially encompassed by the frequency profile of the third signal. 57
45. A method according tc claim 44 wherein only the leading and trailing wings of the intensity profile lie outside the frequer cy profile.
PCT/US2005/009399 2004-03-18 2005-03-18 Flat-topped chirp induced by optical filter edge WO2005089516A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2005800152450A CN1998165B (en) 2004-03-18 2005-03-18 Flat-topped chirp induced by optical filter edge
CA2561128A CA2561128C (en) 2004-03-18 2005-03-18 Flat-topped chirp induced by optical filter edge
EP05731268.8A EP1730860B1 (en) 2004-03-18 2005-03-18 Flat-topped chirp induced by optical filter edge

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US55424304P 2004-03-18 2004-03-18
US60/554,243 2004-03-18
US56606004P 2004-04-28 2004-04-28
US60/566,060 2004-04-28
US56976804P 2004-05-10 2004-05-10
US56976904P 2004-05-10 2004-05-10
US60/569,768 2004-05-10
US60/569,769 2004-05-10
US11/068,032 2005-02-28
US11/068,032 US7555225B2 (en) 2002-11-06 2005-02-28 Optical system comprising an FM source and a spectral reshaping element

Publications (4)

Publication Number Publication Date
WO2005089516A2 WO2005089516A2 (en) 2005-09-29
WO2005089516A9 WO2005089516A9 (en) 2006-01-26
WO2005089516A3 WO2005089516A3 (en) 2006-10-19
WO2005089516B1 true WO2005089516B1 (en) 2007-01-04

Family

ID=34994404

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/009399 WO2005089516A2 (en) 2004-03-18 2005-03-18 Flat-topped chirp induced by optical filter edge

Country Status (5)

Country Link
US (1) US7555225B2 (en)
EP (1) EP1730860B1 (en)
CN (1) CN1998165B (en)
CA (1) CA2561128C (en)
WO (1) WO2005089516A2 (en)

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6963685B2 (en) * 2002-07-09 2005-11-08 Daniel Mahgerefteh Power source for a dispersion compensation fiber optic system
US7663762B2 (en) * 2002-07-09 2010-02-16 Finisar Corporation High-speed transmission system comprising a coupled multi-cavity optical discriminator
US7263291B2 (en) * 2002-07-09 2007-08-28 Azna Llc Wavelength division multiplexing source using multifunctional filters
US7054538B2 (en) * 2002-10-04 2006-05-30 Azna Llc Flat dispersion frequency discriminator (FDFD)
US7564889B2 (en) * 2002-11-06 2009-07-21 Finisar Corporation Adiabatically frequency modulated source
US7558488B2 (en) * 2002-11-06 2009-07-07 Finisar Corporation Reach extension by using external Bragg grating for spectral filtering
US7742542B2 (en) * 2002-11-06 2010-06-22 Finisar Corporation Phase correlated quadrature amplitude modulation
US7536113B2 (en) * 2002-11-06 2009-05-19 Finisar Corporation Chirp managed directly modulated laser with bandwidth limiting optical spectrum reshaper
US7406266B2 (en) * 2002-11-06 2008-07-29 Finisar Corporation Flat-topped chirp induced by optical filter edge
US7505694B2 (en) * 2002-11-06 2009-03-17 Finisar Corporation Thermal chirp compensation systems for a chirp managed directly modulated laser (CML™) data link
US7280721B2 (en) * 2002-11-06 2007-10-09 Azna Llc Multi-ring resonator implementation of optical spectrum reshaper for chirp managed laser technology
US7613401B2 (en) * 2002-12-03 2009-11-03 Finisar Corporation Optical FM source based on intra-cavity phase and amplitude modulation in lasers
US7907648B2 (en) * 2002-12-03 2011-03-15 Finisar Corporation Optical FM source based on intra-cavity phase and amplitude modulation in lasers
US7925172B2 (en) * 2002-12-03 2011-04-12 Finisar Corporation High power, low distortion directly modulated laser transmitter
US7609977B2 (en) * 2002-12-03 2009-10-27 Finisar Corporation Optical transmission using semiconductor optical amplifier (SOA)
US7480464B2 (en) * 2002-12-03 2009-01-20 Finisar Corporation Widely tunable, dispersion tolerant transmitter
US7809280B2 (en) * 2002-12-03 2010-10-05 Finisar Corporation Chirp-managed, electroabsorption-modulated laser
US7542683B2 (en) 2002-12-03 2009-06-02 Finisar Corporation Chirp Managed Laser (CML) transmitter
US7860404B2 (en) * 2002-12-03 2010-12-28 Finisar Corporation Optical FM source based on intra-cavity phase and amplitude modulation in lasers
US7474859B2 (en) * 2002-12-03 2009-01-06 Finisar Corporation Versatile compact transmitter for generation of advanced modulation formats
US7813648B2 (en) * 2002-12-03 2010-10-12 Finisar Corporation Method and apparatus for compensating for fiber nonlinearity in a transmission system
US7630425B2 (en) * 2003-02-25 2009-12-08 Finisar Corporation Optical beam steering for tunable laser applications
US8792531B2 (en) * 2003-02-25 2014-07-29 Finisar Corporation Optical beam steering for tunable laser applications
US7639955B2 (en) 2004-09-02 2009-12-29 Finisar Corporation Method and apparatus for transmitting a signal using a chirp managed laser (CML) and an optical spectrum reshaper (OSR) before an optical receiver
US20070012860A1 (en) * 2005-05-05 2007-01-18 Daniel Mahgerefteh Optical source with ultra-low relative intensity noise (RIN)
KR100713417B1 (en) * 2005-12-02 2007-05-04 삼성전자주식회사 Optical transceiver module
JP5234238B2 (en) * 2006-02-22 2013-07-10 日亜化学工業株式会社 Optical disk device
JP4750205B2 (en) * 2006-04-06 2011-08-17 フィニサー コーポレイション System and method for generating a zero return differential phase shift modulation (RZ-DPSK) optical signal
WO2008021567A2 (en) 2006-08-18 2008-02-21 Finisar Corporation Optical transmission using semiconductor optical amplifier (soa)
WO2008024326A2 (en) * 2006-08-21 2008-02-28 Finisar Corporation Chirp-managed, electroabsorption-modulated laser
US7697186B2 (en) * 2006-10-24 2010-04-13 Finisar Corporation Spectral response modification via spatial filtering with optical fiber
US7962045B2 (en) * 2006-12-22 2011-06-14 Finisar Corporation Optical transmitter having a widely tunable directly modulated laser and periodic optical spectrum reshaping element
US7941057B2 (en) * 2006-12-28 2011-05-10 Finisar Corporation Integral phase rule for reducing dispersion errors in an adiabatically chirped amplitude modulated signal
US8131157B2 (en) 2007-01-22 2012-03-06 Finisar Corporation Method and apparatus for generating signals with increased dispersion tolerance using a directly modulated laser transmitter
FR2912014B1 (en) * 2007-01-31 2011-05-13 St Microelectronics Sa ULTRA LARGE BAND PULSE GENERATOR HAVING AN INTEGRATED DIGITAL FILTER EMULATION FUNCTION, AND TRANSMISSION METHOD.
WO2008097928A1 (en) * 2007-02-02 2008-08-14 Finisar Corporation Temperature stabilizing packaging for optoelectronic components in a transmitter module
US8027593B2 (en) 2007-02-08 2011-09-27 Finisar Corporation Slow chirp compensation for enhanced signal bandwidth and transmission performances in directly modulated lasers
US7991291B2 (en) * 2007-02-08 2011-08-02 Finisar Corporation WDM PON based on DML
US7697847B2 (en) * 2007-04-02 2010-04-13 Finisar Corporation Dispersion compensator for frequency reshaped optical signals
US7991297B2 (en) 2007-04-06 2011-08-02 Finisar Corporation Chirped laser with passive filter element for differential phase shift keying generation
US8204386B2 (en) 2007-04-06 2012-06-19 Finisar Corporation Chirped laser with passive filter element for differential phase shift keying generation
US7760777B2 (en) * 2007-04-13 2010-07-20 Finisar Corporation DBR laser with improved thermal tuning efficiency
US7778295B2 (en) * 2007-05-14 2010-08-17 Finisar Corporation DBR laser with improved thermal tuning efficiency
US8160455B2 (en) 2008-01-22 2012-04-17 Finisar Corporation Method and apparatus for generating signals with increased dispersion tolerance using a directly modulated laser transmitter
US8260145B2 (en) 2008-03-12 2012-09-04 Deepnarayan Gupta Digital radio frequency tranceiver system and method
US7869473B2 (en) * 2008-03-21 2011-01-11 Finisar Corporation Directly modulated laser with isolated modulated gain electrode for improved frequency modulation
US8260150B2 (en) 2008-04-25 2012-09-04 Finisar Corporation Passive wave division multiplexed transmitter having a directly modulated laser array
US20090268765A1 (en) * 2008-04-28 2009-10-29 Daniel Mahgerefteh Intra-Cavity Phase Modulated Laser Based on Intra-Cavity Depletion-Edge-Translation Lightwave Modulators
US8199785B2 (en) 2009-06-30 2012-06-12 Finisar Corporation Thermal chirp compensation in a chirp managed laser

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2107147B (en) 1981-09-03 1985-07-10 Standard Telephones Cables Ltd Optical requency modulation system
US4564119A (en) * 1984-12-07 1986-01-14 Nippon Light Metal Co., Ltd. Aluminum can end
US4805235A (en) 1986-02-17 1989-02-14 Nec Corporation Optical transmitter comprising an optical frequency discriminator
EP0554736B1 (en) 1992-02-01 1996-04-10 Alcatel SEL Aktiengesellschaft Digital optical transmission system with a dispersing optical waveguide at the working wavelength
DE4234599A1 (en) 1992-08-22 1994-02-24 Sel Alcatel Ag Optical transmitter
US5416629A (en) 1992-12-02 1995-05-16 General Instrument Corporation Intensity modulated digital optical communications using a frequency modulated signal laser
FR2745451B1 (en) 1996-02-23 1998-04-17 Cit Alcatel METHOD FOR OPTICAL TRANSMISSION OF DIGITAL DATA
US6115403A (en) * 1997-07-22 2000-09-05 Ciena Corporation Directly modulated semiconductor laser having reduced chirp
US6081361A (en) 1997-10-17 2000-06-27 Lucent Technologies Inc. Sub-carrier multiplexing in broadband optical networks
US6104851A (en) 1998-04-24 2000-08-15 Mahgerefteh; Daniel Transmission system comprising a semiconductor laser and a fiber grating discriminator
US5974209A (en) 1998-04-30 1999-10-26 Cho; Pak Shing System comprising an electroabsorption modulator and an optical discriminator
US6331991B1 (en) * 1998-07-17 2001-12-18 The United States Of America As Represented By The National Security Agency Transmission system using a semiconductor laser and a fiber grating discriminator
FR2781322B1 (en) 1998-07-20 2000-09-08 Alsthom Cge Alcatel OPTICAL DATA TRANSMISSION DEVICE
US6473214B1 (en) * 1999-04-01 2002-10-29 Nortel Networks Limited Methods of and apparatus for optical signal transmission
DE19953332C1 (en) * 1999-11-05 2001-08-09 Siemens Ag Method and arrangement for optimizing an optical transmission signal modulated with a binary data signal
US6298186B1 (en) 2000-07-07 2001-10-02 Metrophotonics Inc. Planar waveguide grating device and method having a passband with a flat-top and sharp-transitions
WO2002012952A2 (en) 2000-08-04 2002-02-14 Evankow Joseph David Jr Apparatus for polarization-independent optical polarization scrambler and a method for use therein
EP1235403B1 (en) 2001-02-22 2012-12-05 Panasonic Corporation Combined frequency and amplitude modulation
US7263291B2 (en) 2002-07-09 2007-08-28 Azna Llc Wavelength division multiplexing source using multifunctional filters
US7663762B2 (en) 2002-07-09 2010-02-16 Finisar Corporation High-speed transmission system comprising a coupled multi-cavity optical discriminator
US6963685B2 (en) * 2002-07-09 2005-11-08 Daniel Mahgerefteh Power source for a dispersion compensation fiber optic system
US7054538B2 (en) 2002-10-04 2006-05-30 Azna Llc Flat dispersion frequency discriminator (FDFD)

Also Published As

Publication number Publication date
CA2561128A1 (en) 2005-09-29
EP1730860A2 (en) 2006-12-13
WO2005089516A3 (en) 2006-10-19
CN1998165B (en) 2011-02-02
EP1730860A4 (en) 2007-11-07
US20060029358A1 (en) 2006-02-09
EP1730860B1 (en) 2013-06-12
WO2005089516A9 (en) 2006-01-26
CN1998165A (en) 2007-07-11
CA2561128C (en) 2016-01-12
US7555225B2 (en) 2009-06-30
WO2005089516A2 (en) 2005-09-29

Similar Documents

Publication Publication Date Title
WO2005089516B1 (en) Flat-topped chirp induced by optical filter edge
US4841519A (en) Apparatus for discriminating an optical signal from others and an apparatus for tuning an optical wavelength filter used in the same
CA2047220C (en) Apparatus for generating a comb of optical teeth of different wavelengths
US7809280B2 (en) Chirp-managed, electroabsorption-modulated laser
EP0957596B1 (en) Data encoded optical pulse generator
US8086112B2 (en) Optical signal processing circuit
EP1895689B1 (en) Wavelength variable laser
CN102931568B (en) Photoelectricity oscillator based on narrow-band double-peak phase shift fiber bragg grating and method thereof
US6791734B2 (en) Method and apparatus for information modulation for impulse radios
US9958708B1 (en) Method of short optical pulse generation
CN112654915A (en) Optoelectronic oscillator using monolithically integrated multiple quantum well laser and phase modulator
Glance et al. Fast optical packet switching based on WDM
JP2016018124A (en) Optical frequency comb generation device
WO2017050053A1 (en) Light-emitting apparatus and emitting method, and light-receiving apparatus and receiving method
US7339720B2 (en) Frequency multiplied optical electronic oscillator
JP2017111276A (en) Optical synthesizer
JPH02126243A (en) Light timing extracting circuit
JP3803748B2 (en) Optical millimeter wave or submillimeter wave generator
JP2002344389A (en) OPTICAL PULSE SOURCE GENERATING RETURN-TO-ZERO PULSE AT WAVELENGTH lambda
US7002724B2 (en) Apparatus and method for generating a 90° alternate phase optical pulsetrain
US7486896B2 (en) Optical clock recovery
KR100579512B1 (en) The wavelength converter which generates the wavelength tunable laser optical source in itself
JPH04163532A (en) Light clock extraction circuit
RU2797498C1 (en) Compact high-power radio-photon signal generator in the gigahertz and terahertz range
Capmany Microwave photonic filters

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

COP Corrected version of pamphlet

Free format text: PAGES 1/6-6/6, DRAWINGS, REPLACED BY NEW PAGES 1/6-6/6

DPEN Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

WWE Wipo information: entry into national phase

Ref document number: 2561128

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2005731268

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 200580015245.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 2005731268

Country of ref document: EP