CN1715993A - Crystal optical fiber solition type full light regenerator and its light signal regenerating method - Google Patents

Crystal optical fiber solition type full light regenerator and its light signal regenerating method Download PDF

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Publication number
CN1715993A
CN1715993A CNA2005100392507A CN200510039250A CN1715993A CN 1715993 A CN1715993 A CN 1715993A CN A2005100392507 A CNA2005100392507 A CN A2005100392507A CN 200510039250 A CN200510039250 A CN 200510039250A CN 1715993 A CN1715993 A CN 1715993A
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light
regenerator
optical
output port
pulse
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CN100424543C (en
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杨祥林
陈鹤鸣
诸波
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Nanjing Post & Telecommunication College
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Nanjing Post & Telecommunication College
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Abstract

The crystal optical fiber soliton type full light regenerator and its light signal regenerating method is used in the light signal transmission for the reforming and reusing of light signal. Of the regenerator, the light shunting coupler has two, one main and one auxiliary, output ports, the main output port is connected to the photon crystal fiber, the photon crystal fiber has output is connected to the light amplitude modulator, the light amplitude modulator has output connected to the light band-pass filter, and the light band-pass filter has output port (OUT) as the output port of the light regenerator. The light shunting coupler has auxiliary output port connected to the output of the light detector, the light detector has output connected to a RF filter, the RF filter has output connected to the input of phase shifter, and the phase shifter has output connected to the light amplitude modulator, to constitute the crystal optical fiber soliton type full light regenerator.

Description

Crystal optical fibre orphan type full light regenerator and optical regeneration method thereof
Technical field
The present invention a kind ofly is used for optical signal transmission excessively, to the multiplying arrangement that light signal is reformed and reused, belongs to the technical field that optical signal amplifier is made.
Background technology
In common low speed electrical communication system, after the electric impulse signal of representing information transmits a segment distance, owing to be subjected to the influence of energy loss along the line, chromatic dispersion and noise etc., its weakened, wave form distortion, and cause signal to noise ratio (S/N ratio) (S/N) reduction and timing jitter, error code to increase, influenced the performance and the communication quality of communication system.Usually, certain distance in system (position) is located, and the method that adopts regenerative repeating to transmit is amplified the signal that dies down again, signal waveform shaping again to distortion, recover the primary standard waveform, and after adjudicating, retiming, send out again, finish the device or the equipment appellation 3R regenerator of this function.
In optical fiber telecommunications system, speed height, big, the distance of capacity, the imperfection that the noise of the loss of Optical Fiber Transmission medium, chromatic dispersion, non-linear, image intensifer, the interaction of interchannel are crosstalked with switching fabric all will cause the signal major injury, limit system and network performance and communication distance.Traditional method is to adopt photoelectricity light 3R regenerative repeating to transmit scheme, the faint light pulse signal that soon after Optical Fiber Transmission, decays, change into electric impulse signal by photoelectricity, and give enough amplifications, balanced and timing, be reduced into behind the digital pulse signal of primary standard drive laser again, export new reproduced light pulse, continue to terminal transmission.This photoelectricity light mixed regeneration repeater, its 3R function is finished in electric territory fully, and the circuit structure complexity, speed is low, cost is high, is unsuitable for using in the high-speed high capacity communication system.
For avoiding above-mentioned limitation, the end of the nineties, more external research units successively propose and have designed the optical regenerative repeater of several different schemes, with the shaping of regenerator, more regularly and regeneration retransmit three kinds of processing and place the light territory to realize that (will light pulse signal not be converted to electric signal handles entirely, exempted the high speed circuit of many complexity), difference appellation polishing shape, light is timing and light repeating transmission (Reshaping, Retiming and Retransmitting), i.e. complete light 3 R regenerator again.As adopt Mach-Zehnder (M-Z) the interfere type complete light 3 R regenerator of semiconductor optical amplifier (SOA) [1], the complete light 3 R regenerator of the optical clock recovery of employing mode-locked laser [2]With wavelength shifter (WC) the type complete light 3 R regenerator that adopts electroabsorption modulator (EAM) etc. [3,4]Compare with photoelectricity light mixed type regenerator, principal feature is that the 3R function realizes in the light territory that all simple in structure, used components and parts parts are few, the speed height, and cost is low, is the huge advance made on 3R regenerator Design Theory and the technical feature.But part also comes with some shortcomings, as make up active optical components such as wavelength shifter that this regenerator need dispose two particular characteristics, complicated clock recovery loop and semiconductor optical amplifier, wavelength-tunable ultrashort pulse semiconductor laser, optical clock pulse generator, these parts prices are all higher, and stability and reliability is lower.
Summary of the invention
Technical matters: the purpose of this invention is to provide a kind of simple in structure, the stability and reliability height, the life-span is long, crystal optical fibre orphan type full light regenerator and optical regeneration method thereof that cost is low.
Technical scheme: crystal optical fibre orphan type full light regenerator of the present invention and optical regeneration method thereof, its purpose also is to be used for purging being subjected to the deformation that injury produced such as chromatic dispersion, non-linear and noise when light pulse signal transmits in system, recovers the accurate pulse sequence signal of former issue of bidding documents.But the academic thought of scheme and mechanism are different from aforementioned two kinds of schemes fully.At first, this programme adopts the academic thought of " with poison system poison ", promptly diffusing and nonlinear interaction produces " orphan's effect " * with linear inverse, to the light pulse signal wave form distortion shaping (Reshaping) that produces separately by chromatic dispersion and nonlinear effect, resile, nonlinear effect is provided by the high nonlinear coefficient photonic crystal fiber.Secondly, adopt synchronous amplitude photomodulator (AM-MOD) time domain control to suppress timing wander and the shake that the interference that produces causes that interact of the ASE cumulative noise that produces by fiber amplifier in the system (EDFA) and interchannel, make optical clock pulse regularly (Retiming) again.The 3rd, adopt optical band pass filter after doing frequency domain equalization control, to retransmit (Retransmitting) downstream through the light pulse signal of shaping and timing again, finally finish 3R (Reshaping, Retiming, Retransmitting) function.This repeating transmission is that the reformation of original signal is reused, rather than the repeating transmission of the local light pulse that provides.
This regenerator is made up of light shunting coupler, photodetector, photonic crystal fiber, light amplitude modulation device, optical band pass filter, radio-frequency filter, phase shifter; The light shunting coupler has major and minor two output ports, the main output port of light shunting coupler connects the output termination light amplitude modulation device of photonic crystal fiber, photonic crystal fiber, the output termination optical band pass filter of light amplitude modulation device, the output port of optical band pass filter is the output port of this regenerator; The secondary output port of light shunting coupler connects the input end of photodetector, the output termination radio-frequency filter of photodetector, the input end of the output termination phase shifter of radio-frequency filter, the output termination light amplitude modulation device of phase shifter constitutes crystal optical fibre orphan type full light regenerator.
The optical regeneration method of crystal optical fibre orphan type full light regenerator is with damaged and the input end of the light pulse signal sequence input crystal optical fiber soliton type full light regenerator that broadening is out of shape, earlier through 1 * 2 high splitting ratio light shunting coupler beam split, most of light signal energy exports from main output port, and directly by both having effect of dispersion, the photonic crystal fiber that has very strong nonlinear effect again, both form the optical soliton effect to the light pulse acting in conjunction, light pulse is transmitted by optical soliton evolution rule, compression and adjustment waveform in transmission course, realize the shaping of distorted waveform, finish shaping and recover the primary standard waveform; Fraction damaged optical pulse energy exports from secondary output port, finishing photoelectricity through photodetector transforms, the optical clock pulse that extracts is converted to electric time clock, handle through radio-frequency filter filtering and phase shifter phase shift again, after recovering the standard electric clock pulse sequence, driving the light amplitude modulation device adjudicates by the light pulse of light amplitude modulation device after finishing shaping, realize again regularly, again through the frequency domain equalization control and treatment of optical band pass filter, obtain at last continuing then to retransmit to system downstream through shaping and the new light pulse of Timing Processing again.
Because several optical passive components are only adopted in the realization of three kinds of functions, finish in the light territory entirely, do not finish in electric territory and do not need to be converted to electric signal, the speed bottleneck that does not exist electric territory to handle, also do not need local light impulse source to retransmit full sized pules, retransmit and only need that clear signal is purged the back, so be the brand-new low-cost complete light 3 R regenerator of a class.
Beneficial effect: with the M-Z interferometer type complete light 3 R regenerator of photoelectricity light mixed regeneration repeater and based semiconductor image intensifer, make the complete light 3 R regenerator of clock recovery and compare based on the complete light 3 R regenerator of EAM-WC (electroabsorption modulator-wavelength shifter) based on mode-locked laser, the characteristic and the innovative point of crystal optical fibre orphan type full light regenerator of the present invention and optical regeneration method thereof mainly contain:
1, principle with in theory, different fully with above-mentioned various regenerators, the present invention is based on the optical soliton effect, adopts the academic thought of " with poison system poison ", by non-linear and interaction chromatic dispersion, two kinds of negative deleterious effects are converted into positive favourable influence, realize the shaping of distorted waveform.
2, on design theory, the present invention has utilized the nonlinear transport evolution rule and the non-linear length of optical fiber and contracting than relation of coefficient of light pulse signal, adopt the strategy of " changing length " with intensity, promptly adopt the photonic crystal fiber of high non-linearity to replace general single mode fiber, shorten non-linear length, make distributed shaping (Reshaping) process that just can finish on than long span optical fiber (as tens kilometers to kilometer up to a hundred), can go up in shorter span (as two kilometers in hundreds of rice to one) and just can finish, become the centralized shaping process of a kind of standard, thereby be configured to a kind of boxlike or box equipment.This is a kind of breakthrough that non-linear light waveguide is theoretical and high non-linear photon crystal optical fiber is used.
3, on the realization mechanism and structure Design of timing again, not needing will provide local light pulse signal as regeneration pulse source and time clock as aforementioned several 3R regenerators, but input pulse is reused as regeneration pulse, and from input pulse, extract time clock span of control limit of control photomodulator, realize regularly judgement and more regularly, structure is very simple and reliable, is that a kind of brand-new timing is declared accurate and timing mechanism again.
4, in structure and accessory design, the present invention does not need to adopt active device and wavelength shifters such as semiconductor optical amplifier and laser instrument, only need adopt a small amount of several optical passive component (photo-coupler, photomodulator and optical band pass filter), can realize full light 3R function, constitute a kind of passive complete light 3 R regenerator, simple in structure, the stability and reliability height, the life-span is long, and cost is low.Design philosophy is first and then novel.
Description of drawings
Fig. 1 is that crystal optical fibre orphan type full light regenerator structure is formed synoptic diagram.Wherein have: light shunting coupler 1, photodetector 2, photonic crystal fiber 3, light amplitude modulation device 4, optical band pass filter 5, radio-frequency filter 6, phase shifter 7, fiber amplifier 8.
Embodiment
This regenerator is made up of light shunting coupler 1, photodetector 2, photonic crystal fiber 3, light amplitude modulation device 4, optical band pass filter 5, radio-frequency filter 6, phase shifter 7; Light shunting coupler 1 has major and minor two output ports, the main output port 11 of light shunting coupler 1 connects the output termination light amplitude modulation device 4 of photonic crystal fiber 3, photonic crystal fiber 3, the output termination optical band pass filter 5 of light amplitude modulation device 4, the output port OUT of optical band pass filter 5 is the output port of this regenerator; The secondary output port 12 of light shunting coupler 1 connects the input end of photodetector 2, the output termination radio-frequency filter 6 of photodetector 2, the input end of the output termination phase shifter 7 of radio-frequency filter 6, the output termination light amplitude modulation device 4 of phase shifter 7 constitutes crystal optical fibre orphan type full light regenerator.
After design and assembling finish, this 3R regenerator is connected in the communication system behind the EDFA, when the damaged that has sufficient intensity in the system and during the input of the light pulse signal sequence of broadening distortion, at first through 1 * 2 high splitting ratio coupling mechanism, make most of light signal energy from main output port 11 outlets, directly pass through photonic crystal fiber.Photonic crystal fiber had both had effect of dispersion, has very strong nonlinear effect again, chromatic dispersion makes light pulse that broadening be arranged slightly, non-linear light pulse is compressed strongly, both form the optical soliton effect to the light pulse acting in conjunction, and light pulse is transmitted by optical soliton evolution rule, compression and adjustment waveform in transmission course, realize the shaping of distorted waveform, when light pulse intensity, CHROMATIC DISPERSION IN FIBER OPTICS and nonlinear factor and length are selected and is reasonable in design, can finish shaping and recover the primary standard waveform; Fraction damaged optical pulse energy is after secondary output port 12 outlets, finishing photoelectricity through photo-detector transforms, the optical clock pulse that extracts is converted to electric time clock, handle through filtering and phase shift again, after recovering the standard electric clock pulse sequence, drive and adjudicate by the light pulse of light amplitude modulation device after 4 pairs of light amplitude modulation devices have been finished shaping, realize again regularly, again through the frequency domain equalization control and treatment of optical band pass filter 5, obtain at last continuing then to retransmit to system downstream through shaping and the new light pulse of Timing Processing again.

Claims (2)

1, a kind of crystal optical fibre orphan type full light regenerator is characterized in that this regenerator is made up of light shunting coupler (1), photodetector (2), photonic crystal fiber (3), light amplitude modulation device (4), optical band pass filter (5), radio-frequency filter (6), phase shifter (7); Light shunting coupler (1) has major and minor two output ports, the main output port (11) of light shunting coupler (1) connects the output termination light amplitude modulation device (4) of photonic crystal fiber (3), photonic crystal fiber (3), the output termination optical band pass filter (5) of light amplitude modulation device (4), the output port (OUT) of optical band pass filter (5) is the output port of this regenerator; The secondary output port (12) of light shunting coupler (1) connects the input end of photodetector (2), the output termination radio-frequency filter (6) of photodetector (2), the input end of the output termination phase shifter (7) of radio-frequency filter (6), the output termination light amplitude modulation device (4) of phase shifter (7) constitutes crystal optical fibre orphan type full light regenerator.
2, a kind of optical regeneration method that is used for the described crystal optical fibre orphan of claim 1 type full light regenerator, it is characterized in that damaged and the input end of the light pulse signal sequence input crystal optical fiber soliton type full light regenerator of broadening distortion, earlier through 1 * 2 high splitting ratio light shunting coupler (1) beam split, most of light signal energy exports from main output port (11), and directly by both having effect of dispersion, the photonic crystal fiber (3) that has very strong nonlinear effect again, both form the optical soliton effect to the light pulse acting in conjunction, light pulse is transmitted by optical soliton evolution rule, compression and adjustment waveform in transmission course, realize the shaping of distorted waveform, finish shaping and recover the primary standard waveform; Fraction damaged optical pulse energy exports from secondary output port (12), finishing photoelectricity through photodetector (2) transforms, the optical clock pulse that extracts is converted to electric time clock, handle through radio-frequency filter (6) filtering and phase shifter (7) phase shift again, after recovering the standard electric clock pulse sequence, driving light amplitude modulation device (4) adjudicates by the light pulse of light amplitude modulation device (4) after finishing shaping, realize again regularly, again through the frequency domain equalization control and treatment of optical band pass filter (5), obtain at last continuing then to retransmit to system downstream through shaping and the new light pulse of Timing Processing again.
CNB2005100392507A 2005-05-11 2005-05-11 Crystal optical fiber solition type full light regenerator and its light signal regenerating method Expired - Fee Related CN100424543C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009076836A1 (en) * 2007-12-14 2009-06-25 Huawei Technologies Co., Ltd. An optical relay system and method
CN102694577A (en) * 2012-06-08 2012-09-26 太原理工大学 Device and method for generating ultra-wideband pulse signal by laser
CN101517939B (en) * 2006-08-07 2013-07-24 诺基亚西门子通信有限责任两合公司 Optical regenerator and phase error detection unit for an optical regenerator and method for optical regeneration
CN106768859A (en) * 2016-12-09 2017-05-31 中国科学院物理研究所 A kind of spectrum widening device based on large mode field antiresonance hollow-core photonic crystal fiber
CN106972892A (en) * 2017-05-05 2017-07-21 深圳市凯利华电子有限公司 A kind of novel C ATV optical fiber and digitals television reception thermomechanical components

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GB9713422D0 (en) * 1997-06-26 1997-08-27 Secr Defence Single mode optical fibre
JP2002277648A (en) * 2001-03-19 2002-09-25 Nippon Telegr & Teleph Corp <Ntt> Light transmission system and single mode optical fiber
AU2002323053A1 (en) * 2001-08-07 2003-02-24 Corning Incorporated Dispersion managed discrete raman amplifiers
US6958855B2 (en) * 2002-09-27 2005-10-25 Northwestern University Microstructure fiber optical parametric oscillator
CN1240166C (en) * 2003-06-04 2006-02-01 清华大学 All optical fibre adjustable width continuous spectrum laser pump source for superflat wide-band Raman amplification
CA2774228C (en) * 2003-08-13 2014-12-02 Nippon Telegraph And Telephone Corporation Structured tellurite glass optical fiber exhibiting controlled zero dispersion within a wavelength band centred at 1.55 .mu.m

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101517939B (en) * 2006-08-07 2013-07-24 诺基亚西门子通信有限责任两合公司 Optical regenerator and phase error detection unit for an optical regenerator and method for optical regeneration
WO2009076836A1 (en) * 2007-12-14 2009-06-25 Huawei Technologies Co., Ltd. An optical relay system and method
US8538274B2 (en) 2007-12-14 2013-09-17 Huawei Technologies Co., Ltd. Optical relay system and method
CN102694577A (en) * 2012-06-08 2012-09-26 太原理工大学 Device and method for generating ultra-wideband pulse signal by laser
CN102694577B (en) * 2012-06-08 2014-12-17 太原理工大学 Method for generating pulse signal for ultra-wideband pulse signal device
CN106768859A (en) * 2016-12-09 2017-05-31 中国科学院物理研究所 A kind of spectrum widening device based on large mode field antiresonance hollow-core photonic crystal fiber
CN106768859B (en) * 2016-12-09 2019-03-19 中国科学院物理研究所 A kind of spectrum widening device based on large mode field antiresonance hollow-core photonic crystal fiber
CN106972892A (en) * 2017-05-05 2017-07-21 深圳市凯利华电子有限公司 A kind of novel C ATV optical fiber and digitals television reception thermomechanical components

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