KR950701482A - Optical Signal Clock Recovery Device and Method (CLOCK RECOVERY) - Google Patents

Optical Signal Clock Recovery Device and Method (CLOCK RECOVERY)

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KR950701482A
KR950701482A KR1019940703808A KR19940703808A KR950701482A KR 950701482 A KR950701482 A KR 950701482A KR 1019940703808 A KR1019940703808 A KR 1019940703808A KR 19940703808 A KR19940703808 A KR 19940703808A KR 950701482 A KR950701482 A KR 950701482A
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signal
optical
modulator
laser
clock
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KR1019940703808A
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KR100322230B1 (en
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스미쓰 케빈
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니콜라 번스톤
브리티쉬 텔리커뮤니케이션즈 퍼블릭 리미티드 캄퍼니
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Priority claimed from EP92303786A external-priority patent/EP0567693A1/en
Priority claimed from PCT/EP1993/000863 external-priority patent/WO1993022717A1/en
Application filed by 니콜라 번스톤, 브리티쉬 텔리커뮤니케이션즈 퍼블릭 리미티드 캄퍼니 filed Critical 니콜라 번스톤
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/027—Speed or phase control by the received code signals, the signals containing no special synchronisation information extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/299—Signal waveform processing, e.g. reshaping or retiming
    • 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
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0075—Arrangements for synchronising receiver with transmitter with photonic or optical means

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Lasers (AREA)
  • Microscoopes, Condenser (AREA)
  • Optical Head (AREA)

Abstract

본 발명은 모드-동기된 레이져(4)를 사용하여 광학적으로 부호화된 신호로부터 클럭신호를 복구하기 위한 장치 및 방법에 관한 것으로, 변조기(2)가 레니져의 레이져 공진기(3)와 입력된 광학적으로 부호화된 신호를 상기 변조기(2)에 인가하는 전송로(1)에 공통으로 연결되어, 상기 변조기(2)가 광학적으로 부호화된 신호에 응답하여 상기 레이져 공진기(30)내의 빛의 위상 및/또는 진폭을 변조하므로써 출력펄스 스트림의 위상 및 주파수를 상기 광학적으로 부호화된 신호의 타이밍 파형에 동기시키고, 바람직한 예로서 상기 변조기는 상기 레이져 공진기내의 빛의 교차-위상 변조기(XPM)를 위해 사용되는 비선형 광 변조기인 것을 특징으로 한다.The present invention relates to an apparatus and a method for recovering a clock signal from an optically encoded signal using a mode-synchronized laser (4), wherein the modulator (2) is input optically with the laser resonator (3) of the laser. Is commonly connected to a transmission path 1 for applying a signal encoded by the modulator 2, wherein the modulator 2 responds to the optically encoded signal and / or the phase of light in the laser resonator 30 Or by modulating the amplitude to synchronize the phase and frequency of the output pulse stream to the timing waveform of the optically encoded signal, and as a preferred example the modulator is a non-linear that is used for a cross-phase modulator (XPM) of light in the laser resonator. It is characterized by a light modulator.

Description

광신호 클럭 복구 장치 및 방법(CLOCK RECOVERY)Optical Signal Clock Recovery Device and Method (CLOCK RECOVERY)

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 클럭복구회로를 나타내는 도면이고1 is a diagram illustrating a clock recovery circuit.

제2A도 및 제2B도는 주기적 펄스열과 비주기적 펄스열 각각에 대한 시간영역 파형 및 그에 대응하는 파워스펙트럼(power spectrum)를 나타내고,2A and 2B show time-domain waveforms and corresponding power spectrums for each of a periodic pulse sequence and an aperiodic pulse sequence, respectively.

제3a도 및 제3b도는 모든-광신호 클럭복구회로의 두가지 다른 실시예를 나타낸다.3A and 3B show two different embodiments of all-optical signal clock recovery circuits.

Claims (24)

모드-동기된 레이져(4)와, 상기 모드-동기된 레이져(4)의 광 공진기 경로내에 설치된 변조기(2)와, 상기 변조기(2)로 광학적으로 부호화된 입력신호를 인가하기 위한 수단(1)과, 광펄스 스트림을 출력하기 위한 수단(5)으로 이루어지고, 상기 변조기(2)는 광학적으로 부호화된 신호에 응답하여 레이져 공진기내의 빛의 위상 및/또는 진폭을 변조하므로써 광학적으로 부호화된 신호의 타이밍 파형에 출력 펄스 스트림의 위상 및 주파수를 동기시키는 것을 특징으로 하는 광학적으로 부호화된 신호로부터 클럭신호를 복구하기 위한 광신호 클럭복구장치.Means for applying an optically coded input signal to the modulator 2, a modulator 2 provided in the mode-synchronized laser 4, an optical resonator path of the mode-synchronized laser 4, and And means 5 for outputting an optical pulse stream, said modulator 2 being optically encoded by modulating the phase and / or amplitude of light in the laser resonator in response to the optically encoded signal. And an optical signal clock recovery apparatus for recovering a clock signal from an optically encoded signal, wherein the phase and frequency of the output pulse stream are synchronized with a timing waveform of. 제1항에 있어서, 상기 출력펄스 스트림은 광학적으로 부호화된 신호를 위한 연속되는 광처리 단계를 동기시키는데 사용되는 것을 특징으로 하는 광신호 클럭복구장치.The apparatus of claim 1, wherein the output pulse stream is used to synchronize successive light processing steps for an optically encoded signal. 제1항 또는 제2항에 있어서, 상기 변조기(2)는 광학적으로 부호화된 신호를 위한 광 전송로와 레이져 공진기에 공통으로 연결된 비선형 광매체인 것을 특징으로 하는 광신호 클럭복구장치.3. The optical signal clock recovery apparatus according to claim 1 or 2, wherein the modulator (2) is a nonlinear optical medium commonly connected to an optical transmission path for an optically encoded signal and a laser resonator. 제2항 또는 제3항에 있어서, 상기 모드-동기된 레이져(4)의 능동매체는 광학적으로 부호화된 신호를 위한 광 전송로의 일부로써 신호를 증폭하는 것을 특징으로 하는 광신호 클럭복구장치.4. An optical signal clock recovery apparatus according to claim 2 or 3, wherein the active medium of the mode-synchronized laser (4) amplifies the signal as part of an optical path for an optically encoded signal. 제1항 내지 제4항중 어느 한 항에 있어서, 상기 모드-동기된 레이져(4)는 파이버 레이져인 것을 특징으로 하는 광신호 클럭복구장치.5. Apparatus as claimed in any one of the preceding claims, characterized in that the mode-synchronized laser (4) is a fiber laser. 제1항 내지 제5항중 어느 한 항에 있어서, 상기 변조기(2)는 교차-위상 변조기(XPM)으로 구성된 것을 특징으로 하는 광신호 클럭복구장치.6. Optical signal clock recovery apparatus according to any one of the preceding claims, characterized in that the modulator (2) consists of a cross-phase modulator (XPM). 제1항 내지 제6항중 어느 한 항에 있어서, 상기 광 펄스 스트림과 레이져 공진기는 서로 다른 파장에 동조되고, 상기 변조기(2)는 파장-선택 결합기(WDM1, WDM2)에 의해 광 공진기에 결합된 것을 특징으로 하는 광신호 클럭복구장치.The optical pulse stream and the laser resonator are tuned to different wavelengths, and the modulator 2 is coupled to the optical resonator by wavelength-selective combiners WDM1, WDM2. Optical signal clock recovery device, characterized in that. 제1항 내지 제7항중 어느 한 항에 있어서, 상기 변조기(2)는 파이버 변조기인 것을 특징으로 하는 광신호 클럭복구장치.8. Apparatus according to any one of the preceding claims, wherein said modulator (2) is a fiber modulator. 제8항에 있어서, 상기 파이버 변조기는 루프 미러 장치에 연결된 것을 특징으로 하는 광신호 클럭복구장치.9. The apparatus of claim 8, wherein the fiber modulator is connected to a loop mirror device. 제8항 또는 제9항에 있어서, 상기 광학적으로 부호화된 입력되는 신호와 상기 모드-동기된 레이져로부터의 광 펄스 스트림은 서로 다른 극성 상태에 의해 구별되고, 상기 파이버 변조기는 적어도 한 길이의 복굴절 파이버를 포함하는 것을 특징으로 하는 광신호 클럭복구장치.10. The birefringent fiber of claim 8 or 9, wherein the optically encoded input signal and the optical pulse stream from the mode-synchronized laser are distinguished by different polarity states. Optical signal clock recovery apparatus comprising a. 제10항에 있어서, 상기 파이버 변조기는 서로 다른 방향을 갖고 끝과 끝이 결합된 적어도 두 길이의 복굴절 파이버로 이루어져서 레이져 펄스 스트림과 입력신호 사이의 어떤 지연차가 사실상 상쇄되는 것을 특징으로 하는 광신호 클럭복구장치.11. The optical signal clock of claim 10 wherein the fiber modulator consists of at least two lengths of birefringent fibers having different directions and coupled end to end such that any delay difference between the laser pulse stream and the input signal is substantially canceled out. Recovery device. 제1항 내지 제11항중 어느 한 항에 있어서, 상기 광신호 클럭복구장치는 또한 모드-동기된 레이져의 광 공진기에 연결된 수동의 비선형 펄스-정형 소자를 구비한 것을 특징으로 하는 광신호 클럭복구장치.12. The optical signal clock recovery apparatus according to any one of claims 1 to 11, wherein the optical signal clock recovery apparatus further comprises a passive nonlinear pulse-shaping element connected to an optical resonator of a mode-synchronized laser. . 광학적으로 부호화된 신호로 모드-동기된 레이져(4)내의 변조기(2)를 구동하는 단계와, 레이져내에서 상기광학적으로 부호화된 신호의 타이밍 파형에 위상 및 주파수 동기된 펄스열을 발생시키는 단계로 이루어진 것을 특징으로 하는 광학적으로 부호화된 신호로부터 클럭신호를 복구하기 위한 광신호 클럭복구방법.Driving a modulator 2 in a mode-synchronized laser 4 with an optically encoded signal, and generating a phase- and frequency-synchronized pulse train in a timing waveform of the optically encoded signal within the laser. An optical signal clock recovery method for recovering a clock signal from an optically encoded signal. 제13항에 있어서, 상기 변조기는 광학적으로 부호화된 신호의 광 전송로와 레이져 공진기에 공통으로 연결된 비선형 광매체이고, 상기 레이져 펄스열의 펄스의 파워는 펄스를 펄스열로 정렬하는 신호로 이루어진 펄스의 파이밍을 쉬프트할 수 있도록 상기 광학적으로 부호화된 신호를 차례로 변조하기에 충분한 것을 특징으로 하는 광신호 클럭복구 방법.The pulse modulator of claim 13, wherein the modulator is a nonlinear optical medium connected in common to an optical transmission path of an optically encoded signal and a laser resonator, and the power of the pulse of the laser pulse train is a signal of a pulse arranged in a pulse train. And recovering the optically encoded signal in order to shift the dimming. 파이버 레이져(6)와, 상기 파이버 레이져를 펌핑하기 위한 수단(7)과, 상기 파이버 레이져의 광 공진기 경로와 구동신호용 광 전송로에 공통으로 연결된 파이버 변조기(8)와, 상기 레이져로부터의 광 펄스 스트림을 출력하기 위한 수단(FC)을 구비하고, 상기 구동신호는 상기 레이져 공진기의 광로내의 빛의 위상 및/또는 진폭을 변조하여 상기 레이져를 모드-동기시키는 것을 특징으로 하는 모드-동기된 레이져 시스템.A fiber laser 6, means for pumping the fiber laser 7, a fiber modulator 8 commonly connected to the optical resonator path of the fiber laser and an optical transmission path for a drive signal, and an optical pulse from the laser Means (FC) for outputting a stream, wherein said drive signal modulates the phase and / or amplitude of light in the optical path of said laser resonator to mode-synchronize said laser. . 제15항에 있어서, 상기 모드-동기된 레이져 시스템은 또한 상기 파이버 레이져(6의 광공진기내에 수동의 비선형 펄스-정형 소자를 구비한 것을 특징으로 하는 모드-동기된 레이져 시스템.16. The mode-synchronized laser system of claim 15, wherein the mode-synchronized laser system also includes a passive nonlinear pulse-shaping element in the fiber laser (6). 제1항 내지 제12항중 어느 한 항에 따른 클럭복구장치와, 상기 클럭복구장치의 출력과 데이타를 운반하는 광신호용 소스에 연결된 변조회로를 구비하고, 사실상 클럭신호의 타이밍에 동기된 변조된 신호를 발생시키도록 구성된 것을 특징으로 하는 광신호 재발생기.13. A modulated signal comprising a clock recovery device according to any one of claims 1 to 12, and a modulation circuit connected to an output of said clock recovery device and a source for an optical signal carrying data, and substantially synchronized with the timing of the clock signal. An optical signal regenerator, characterized in that configured to generate. 제17항에 있어서, 상기 변조기는 데이타 운반 신호 및 클럭 신호를 수신하여 상기 클럭신호를 데이타와 함께 증폭-변조하여 재동기되고 변조된 출력신호를 제공하도록 구성된 비선형 광매체를 포함하는 것을 특징으로 하는 광신호 재발생기.18. The apparatus of claim 17, wherein the modulator comprises a nonlinear optical medium configured to receive a data carrying signal and a clock signal and to amplify-modulate the clock signal with data to provide a resynchronized and modulated output signal. Optical signal regenerator. 제17항에 있어서, 상기 변조회로는 광신호를 전송하는 제1광신호 전송로(1)와, 상기 클럭복구장치로부터 출력된 클럭신호를 전송하는 제2광신호 전송로(2)와, 상기 제1 및 제2광신호 전송로에 공통으로 연결된 비선형 광매체로 이루어지고, 상기 클럭신호는 상기 비선형 광매체를 폄핑하여 상기 광신호를 교차-위상 변조하고 사실상 광신호의 타이밍을 클럭신호로 정렬하는 것을 특징으로 하는 광신호 재발생기.18. The apparatus of claim 17, wherein the modulation circuit comprises: a first optical signal transmission path (1) for transmitting an optical signal, a second optical signal transmission path (2) for transmitting a clock signal output from the clock recovery device, and A nonlinear optical medium commonly connected to the first and second optical signal transmission paths, wherein the clock signal cross-phase modulates the optical signal by mapping the nonlinear optical medium and substantially aligns the timing of the optical signal with the clock signal. An optical signal regenerator, characterized in that. 제17, 18, 또는 19항에 있어서, 상기 비선형 광매체는 파이버 변조기인 것을 특징으로 하는 광신호 재발생기.20. The optical signal regenerator of claim 17, 18, or 19 wherein the nonlinear optical medium is a fiber modulator. 제20항에 있어서, 상기 파이버 변조기는 루프 미러로 구성된 것을 특징으로 하는 광신호 재발생기.21. The optical signal regenerator of claim 20, wherein said fiber modulator is comprised of a loop mirror. 제13 또는 제14항에 따른 클럭복구방법에 의해 클럭신호를 복구하는 단계와, 데이타를 운반하는 신호와 상기 복구된 클럭을 변조기에 인가하여 사실상 상기 클럭에 동기하여 정렬되고 변조된 신호를 발생시키는 단계로 이루어지는 광신호를 재발생시키기 위한 방법.Recovering a clock signal by a clock recovery method according to claim 13 or 14, and applying a signal carrying data and the recovered clock to a modulator to generate a substantially aligned and modulated signal in synchronization with the clock; A method for regenerating an optical signal consisting of steps. 제22항에 있어서, 상기 변조기내에서 상기 클럭을 상기 데이타를 운반하는 신호와 함께 진폭-변조하여 변조된 클럭신호를 출력하는 단계를 포함하는 것을 특징으로 하는 광신호를 재발생시키기 위한 방법.23. The method of claim 22, comprising amplitude-modulating the clock with the signal carrying the data in the modulator to output a modulated clock signal. 제22항에 있어서, 상기 변조기내에서 상기 클럭과 상기 데이타를 운반하는 신호를 교차-위상 변조하여 위상-변조된 데이타 운반 신호를 분산매체를 통해 출력하여 데이타 운반 신호를 클럭으로 정렬하기 위해 상기 데이타 운반 신호의 타이밍을 쉬프트시키는 단계를 포함하는 것을 특징으로 하는 광신호를 재발생시키기 위한 방법.23. The method of claim 22, wherein in said modulator, a cross-phase modulation of said clock carrying signal and said data carrying signal outputs a phase-modulated data carrying signal through a dispersion medium to align the data carrying signal with a clock. Shifting the timing of the conveying signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940703808A 1992-04-27 1994-10-26 Optical signal clock recovery device and method KR100322230B1 (en)

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EP92303786A EP0567693A1 (en) 1992-04-27 1992-04-27 Optical clock recovery
EP92303786.5 1992-04-27
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PCT/EP1993/000863 WO1993022717A1 (en) 1992-04-30 1993-04-07 Motor driven step switch

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