CN101295853A - Wavelength-tunable exterior injection type gain switch laser - Google Patents
Wavelength-tunable exterior injection type gain switch laser Download PDFInfo
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- CN101295853A CN101295853A CNA2007100177764A CN200710017776A CN101295853A CN 101295853 A CN101295853 A CN 101295853A CN A2007100177764 A CNA2007100177764 A CN A2007100177764A CN 200710017776 A CN200710017776 A CN 200710017776A CN 101295853 A CN101295853 A CN 101295853A
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Abstract
The invention relates to a gain-switch laser, in particular to a wavelength tunable external injection type gain-switch laser. The gain-switch laser comprises a body, a fiber amplifier, a narrow band adjustable filter, a first coupler and a second coupler. The first coupler, the fiber amplifier, the narrow band adjustable filter and the second coupler are connected in series to the signal output end of the body of the gain-switch laser in sequence by optical fibers and the second coupler is connected with the first coupler by output optical fibers. The invention aims at solving the technical problems existing in the background technique of the gain-switch lasers and provides the wavelength tunable external injection type gain-switch laser which has wide application, simple structure, small volume, low cost and pure spectra.
Description
Technical field
The present invention relates to a kind of gain switch laser, especially a kind of exterior injection type gain switch laser of tunable wave length.
Background technology
The ultrashort light pulse source is to realize one of ultrahigh speed, big capacity System of all Optical Communication and server parts, and it also has important use to be worth at aspects such as ultra-wideband-light signal sampling, optical storage, ultra high-speed optical submodule-number conversions.In actual applications, require the ultrashort light pulse source to have that volume is little, simple in structure, repetition rate is high, shake is low, versatility is good, cost is low and characteristics such as reliability height.During telecommunication is used, be implementation structure compactness, ultra high-speed optical transmitter and the array thereof that can produce in batches, also require the ultrashort light pulse source to have the advantages that to integrate with other optics.
The gain switch of semiconductor laser is a kind of simple, reliable ultrashort light pulse technology, can be conveniently used in the existing commercialization semiconductor laser, can export the picosecond light pulse signal of variable repetition frequency neatly, adapt to different communication interface rate or network upgrade and regenerate, the different data rate signal is carried out ultrafast sampling and waveform monitoring etc.Though gain switch laser exists timing jitter and the big problem of frequency chirp, can adopt modes such as optical injection-locked and light filtering to solve.
The optical injection-locked mode of gain switch laser can be divided into the outer two kinds of methods of injecting and inject certainly.Though adopt the outer problem of the harmonious inhibition shake of wavelength-tunable of injecting and can solving the light pulse signal of gain switch from method for implanting, require the exocoel loop-length L of gain switch laser and the repetition rate f of the ultrashort light pulse periodic sequence that produced from method for implanting
rFormula relation is 1. satisfied in strictness:
Wherein m is a positive integer, and τ is that a ultrashort optical pulse signal is by this needed transmission time of exocoel loop.If the transmission rate of light pulse signal in the exocoel loop is v, then
The exocoel loop design is finished, and exocoel loop-length L value is promptly fixing, from the repetition rate f of the ultrashort light pulse periodic sequence that pouring-in gain switch laser produced
rJust can 1. determine, and gain switch has just lost flexibly changing light pulse signal repetition rate f by formula
rCharacteristic.In the practical application, influenced by ambient temperature conversion etc., be difficult on the engineering guarantee that the interface data speed of communication system and network is the 1. determined repetition rate f of formula all the time
r, this is very limited with regard to feasible range of application from pouring-in gain switch laser.Though outer method for implanting can address this problem, but exterior injection type gain switch laser needs additionally to use narrow breadth of spectrum line continuous wave (CW) light source of a tunable wave length to make the outside seed light source that injects usually again, and the result will cause the increase of gain switch laser cost, complex structure and volume to increase.
Summary of the invention
The present invention is for solving the technical problem that gain switch laser exists in the background technology, and a kind of tunable, applied range is provided, and is simple in structure, volume is little, cost is low, the exterior injection type gain switch laser of specpure tunable wave length.
Technical solution of the present invention is: the present invention is a kind of Wavelength-tunable exterior injection type gain switch laser, comprise the gain switch laser body, its special character is: described laser also comprises fiber amplifier, the arrowband tunable filter, first coupler, second coupler; First coupler, fiber amplifier, arrowband tunable filter and second coupler are connected in the signal output part of gain switch laser body successively by optical fiber, second coupler inserts first coupler by output optical fibre.
Above-mentioned gain switch laser body is the gain switch laser that is made of F-P semiconductor laser, radio-frequency signal generator, radio frequency signal amplifiers and direct current biasing power supply.
Above-mentioned fiber amplifier is Erbium-Doped Fiber Amplifier or optical semiconductor fiber amplifier, and other can cover required wave band solid image intensifer.
The also available adjustable optic fibre grating of above-mentioned arrowband tunable filter and other adjustable narrow-band spectrum component selectors.
Above-mentioned first coupler and second coupler are fiber coupler or spectroscope and some other beam separation device.
The present invention is on the basis of existing gain switch laser, increased fiber amplifier, the arrowband tunable filter, first coupler, second coupler, carry out light signal by fiber amplifier and amplify, by being arranged at the arrowband tunable filter of fiber amplifier output, can screening the narrow spectral line light component that is positioned at spontaneous radiation ASE noise frequency range.Constitute the light signal feedback loop by first coupler and second coupler, make the spectral components signal of arrowband tunable filter output corresponding to certain longitudinal mode of gain switch laser body, and when this signal of small part being injected into the gain switch laser body by second coupler, longitudinal mode concussion corresponding with injecting wavelength of optical signal in the gain switch laser body cavity strengthens, change the output wave long value of arrowband tunable filter, and it is each all corresponding to each different longitudinal modes of gain switch laser body, then the centre wavelength of the operation of the single longitudinal mode in the gain switch laser body cavity changes thereupon, thereby realize the tunable of gain switch laser wavelength, the present invention simultaneously allows this signal re-injection of sub-fraction go into the sharp device body of gain switch, most of output, elimination other longitudinal modes that do not suppress fully, the spectrum of output is very pure, so the present invention has the following advantages:
1, simple in structure, be easy to make, but optics is integrated.
2, the present invention has not only kept the characteristic of gain switch flexibly changing light pulse repetition rate, and do not need the narrow spectral line continuous wave laser of tunable wave length to inject the function that seed light source just can be realized tunable wave length as special outside, not only simplify system configuration, and reduced system cost and volume.
3, pure and little, the good stability of single longitudinal mode, timing jitter and frequency chirp of output spectrum.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is that the present invention is the spectrogram of exporting under the optical injection-locked of 1541nm at wavelength;
Fig. 3 is the constitutional diagram of the spectrogram exported under different optical injection-lockeds of the present invention;
Fig. 4 is the ultrashort light pulse sequence of repetition rate of the present invention when being 1GHz;
Fig. 5 is the ultrashort light pulse sequence of repetition rate of the present invention when being 2.5GHz.
Embodiment
Referring to Fig. 1, the present invention includes gain switch laser body 1, fiber amplifier 7, arrowband tunable filter 8, the first couplers 6 and second coupler 9; First coupler 6, fiber amplifier 7, arrowband tunable filter 8 and second coupler 9 are connected in the signal output part of gain switch laser body 1 successively by optical fiber, second coupler 9 inserts first coupler 6 by output optical fibre.
Gain switch laser body 1 can adopt existing gain switch laser, as adopts the existing gain switch laser that is made of F-P semiconductor laser (Fabry-Bo Luo semiconductor laser) 4, radio-frequency signal generator 2, radio frequency signal amplifiers 3 and direct current biasing power supply 5.Because the light pulse signal power of gain switch laser output is general lower, in the practical application, will adopt optical amplifier to strengthen its power usually.
The also available adjustable optic fibre grating of arrowband tunable filter 8 and other adjustable narrow-band spectrum component selectors.Because fiber amplifier 7 can produce amplified spontaneous emission ASE (amplifiedspontaneous emission) noise of wide spectrum, by being arranged at the arrowband tunable filter 8 of fiber amplifier 7 outputs, can screening the narrow spectral line light component that is positioned at spontaneous radiation ASE noise frequency range.For locking the outside light signal that injects, regulate arrowband tunable filter 8, the centre wavelength of selected narrow spectral components signal is identical with one of them longitudinal mode of gain switch laser body 1, then the light signal of arrowband tunable filter 8 outputs promptly can be used as external seed light re-injection to gain switch laser body 1, longitudinal mode concussion selected in gain switch laser body 1 chamber is obviously strengthened, suppressed other longitudinal mode in gain switch laser body 1 chamber simultaneously.Thereby guarantee the single longitudinal mode running of gain switch laser body 1, and effectively suppress timing jitter.
Referring to Fig. 2,3, after adopting novel outside injection mode of the present invention, arrowband tunable filter 8 filters out the spectral components signal corresponding to certain longitudinal mode of gain switch laser body 1, and it is injected into F-P semiconductor laser 4 in the gain switch laser body 1 by the light signal feedback loop, realize the single longitudinal mode running status of gain switch laser body 1, change the output wave long value of spectral components signal selector, and make it each all corresponding to each different longitudinal modes of gain switch laser body 1, can realize tunable wave length, simultaneously, also reduced the frequency chirp of gain switch light pulse signal.
Change situation about changing referring to Fig. 4, the 5 output optical pulse signal repetition rates that record for experiment with input radio frequency sinusoidal signal or cosine signal repetition rate.Gain switch laser of the present invention can realize repetition rate variable, low jitter, single longitudinal mode operation.
Claims (5)
1, a kind of Wavelength-tunable exterior injection type gain switch laser comprises the gain switch laser body, it is characterized in that: described laser also comprises fiber amplifier, arrowband tunable filter, first coupler, second coupler; Described first coupler, fiber amplifier, arrowband tunable filter and second coupler are connected in the signal output part of gain switch laser body successively by optical fiber, described second coupler inserts first coupler by output optical fibre.
2, Wavelength-tunable exterior injection type gain switch laser according to claim 1 is characterized in that: described gain switch laser body is the gain switch laser that is made of F-P semiconductor laser, radio-frequency signal generator, radio frequency signal amplifiers and direct current biasing power supply.
3, Wavelength-tunable exterior injection type gain switch laser according to claim 1 and 2 is characterized in that: described fiber amplifier is Erbium-Doped Fiber Amplifier or optical semiconductor fiber amplifier.
4, Wavelength-tunable exterior injection type gain switch laser according to claim 3 is characterized in that: described arrowband tunable filter adopts adjustable optic fibre grating or adjustable narrow-band spectrum component selector.
5, Wavelength-tunable exterior injection type gain switch laser according to claim 4 is characterized in that: described first coupler and second coupler all adopt fiber coupler or spectroscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100177764A CN101295853B (en) | 2007-04-29 | 2007-04-29 | Wavelength-tunable exterior injection type gain switch laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100177764A CN101295853B (en) | 2007-04-29 | 2007-04-29 | Wavelength-tunable exterior injection type gain switch laser |
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| CN101295853A true CN101295853A (en) | 2008-10-29 |
| CN101295853B CN101295853B (en) | 2012-01-04 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136675A (en) * | 2011-02-24 | 2011-07-27 | 上海大学 | Self-injection multi-mode tilted optical fiber grating external cavity picopulse laser |
| CN101740994B (en) * | 2008-11-07 | 2011-08-10 | 中国科学院西安光学精密机械研究所 | Semiconductor optical amplifier-based external injection type linear cavity actively mode-locked fiber laser |
| CN102545026A (en) * | 2011-04-06 | 2012-07-04 | 北京国科世纪激光技术有限公司 | System and method capable of realizing energy stability of injected laser |
| CN105428973A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Wide tunable single-frequency fiber laser light source for coherent optical orthogonal frequency division multiplexing system |
| CN106684704A (en) * | 2017-03-29 | 2017-05-17 | 重庆大学 | Ultra-narrow line-width laser device |
| CN109906406A (en) * | 2016-07-20 | 2019-06-18 | 伊里西奥梅公司 | For generating short or ultrashort light pulse system |
| CN110380331A (en) * | 2019-07-22 | 2019-10-25 | 华东师范大学 | A kind of chopped pulse and the method for obtaining adjustable picosecond pulse |
| CN110518454A (en) * | 2019-07-19 | 2019-11-29 | 深圳技术大学 | A kind of seed source device being able to achieve super continuous spectrums spectral laser |
| CN112652938A (en) * | 2019-10-09 | 2021-04-13 | 莫列斯有限公司 | Spectrum and power tunable ASE light source |
| CN116599596A (en) * | 2023-07-17 | 2023-08-15 | 中国科学院西安光学精密机械研究所 | On-chip octave rate adjustable DPSK demodulator and tuning method |
| JP7384067B2 (en) | 2020-02-19 | 2023-11-21 | ウシオ電機株式会社 | semiconductor laser equipment |
Family Cites Families (2)
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| CN1193471C (en) * | 2002-12-17 | 2005-03-16 | 太原理工大学 | Irrelevant pulse semiconductor laser with low jitter frequency |
| CN201038593Y (en) * | 2007-04-29 | 2008-03-19 | 中国科学院西安光学精密机械研究所 | Wave length tunable outer infusion type gain-switched laser |
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2007
- 2007-04-29 CN CN2007100177764A patent/CN101295853B/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101740994B (en) * | 2008-11-07 | 2011-08-10 | 中国科学院西安光学精密机械研究所 | Semiconductor optical amplifier-based external injection type linear cavity actively mode-locked fiber laser |
| CN102136675A (en) * | 2011-02-24 | 2011-07-27 | 上海大学 | Self-injection multi-mode tilted optical fiber grating external cavity picopulse laser |
| CN102545026A (en) * | 2011-04-06 | 2012-07-04 | 北京国科世纪激光技术有限公司 | System and method capable of realizing energy stability of injected laser |
| CN102545026B (en) * | 2011-04-06 | 2013-08-21 | 北京国科世纪激光技术有限公司 | System and method capable of realizing energy stability of injected laser |
| EP3392985A4 (en) * | 2015-12-18 | 2019-09-04 | South China University of Technology | Width-tunable single-frequency fibre laser light source for coherent optical orthogonal frequency division multiplexing system |
| CN105428973A (en) * | 2015-12-18 | 2016-03-23 | 华南理工大学 | Wide tunable single-frequency fiber laser light source for coherent optical orthogonal frequency division multiplexing system |
| CN109906406A (en) * | 2016-07-20 | 2019-06-18 | 伊里西奥梅公司 | For generating short or ultrashort light pulse system |
| JP2019522377A (en) * | 2016-07-20 | 2019-08-08 | イリシオメ | System for generating short or ultrashort light pulses |
| CN106684704A (en) * | 2017-03-29 | 2017-05-17 | 重庆大学 | Ultra-narrow line-width laser device |
| CN106684704B (en) * | 2017-03-29 | 2019-09-17 | 重庆大学 | Super-narrow line width laser |
| CN110518454A (en) * | 2019-07-19 | 2019-11-29 | 深圳技术大学 | A kind of seed source device being able to achieve super continuous spectrums spectral laser |
| CN110380331A (en) * | 2019-07-22 | 2019-10-25 | 华东师范大学 | A kind of chopped pulse and the method for obtaining adjustable picosecond pulse |
| CN112652938A (en) * | 2019-10-09 | 2021-04-13 | 莫列斯有限公司 | Spectrum and power tunable ASE light source |
| CN112652938B (en) * | 2019-10-09 | 2024-05-10 | 莫列斯有限公司 | ASE light source with tunable spectrum and power |
| JP7384067B2 (en) | 2020-02-19 | 2023-11-21 | ウシオ電機株式会社 | semiconductor laser equipment |
| CN116599596A (en) * | 2023-07-17 | 2023-08-15 | 中国科学院西安光学精密机械研究所 | On-chip octave rate adjustable DPSK demodulator and tuning method |
| CN116599596B (en) * | 2023-07-17 | 2023-09-29 | 中国科学院西安光学精密机械研究所 | On-chip octave rate adjustable DPSK demodulator and tuning method |
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