CN1295560C - Tunable narrow line optical fiber amplifier - Google Patents
Tunable narrow line optical fiber amplifier Download PDFInfo
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- CN1295560C CN1295560C CNB200410084637XA CN200410084637A CN1295560C CN 1295560 C CN1295560 C CN 1295560C CN B200410084637X A CNB200410084637X A CN B200410084637XA CN 200410084637 A CN200410084637 A CN 200410084637A CN 1295560 C CN1295560 C CN 1295560C
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- optical fiber
- fiber amplifier
- narrow line
- tunable narrow
- modulator
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Abstract
The present invention relates to a tunable narrow line width optical fiber amplifier. The amplifier takes a coupler as the core, and is orderly composed of an array laser diode, a pulse generator, a stretcher, a polarization generating isolator and the coupler along an input optical path. One output end of the coupler is connected with a modulator and an erbium doped optical fiber amplifier in series through a first polarization preserving optical fiber bundle, and then, is coupled with the coupler. The other output end of the coupler is inputted in the modulator through a second polarization preserving optical fiber bundle, and then, is inputted in a receiver through a wavelength division multiplexer and a compressor. The present invention has tunable output wavelength and narrow line width. The whole amplifier is completely fixed, and has the advantages of simple structure and easy operation.
Description
Technical field
The present invention relates to fiber amplifier, particularly a kind of tunable narrow line optical fiber amplifier.Mainly amplify narrow linewidth chirp signal light and tunable according to the optical system of controllable way generation nonlinearities change.
Background technology
In the prior art skin specially De Lajike (PeterDDragic) at " seed inject Q-switch ring laser " (Injection-Seeded Q-Switched Fiber Ring Laser) [IEEEPhotonics Technology Letters Vol.16, No.8, P1822 (2004)] discussed mechanism and experiment that the negative feedback of seed signal light injects the Q-switch laser instrument in the literary composition, the glistening light of waves of being expert at is intrafascicular to be injected as seed after telling 10% light self-loopa, lays a good foundation for tunable narrow line optical fiber amplifier is provided.
Summary of the invention:
The purpose of this invention is to provide a kind of tunable narrow line optical fiber amplifier, its output wavelength is tunable and narrow linewidth output, and whole amplifier all solidifies, and is simple in structure, operation easily.
Basic design of the present invention is: utilize flashlight to produce pulse light through the pulse generator, with having sent into inclined to one side isolator behind its broadening, again in coupling mechanism is coupled to fibre bundle.An optical fiber injects seed light around conduct in time coupling mechanism behind modulator and Erbium-Doped Fiber Amplifier (EDFA), several optical fiber are coupled into the seed light of amplification after wavelength division multiplexer and modulator in addition, recompression is input on the receiver, and this amplifier has narrow linewidth, and the characteristics of tunable wave length.
Technical solution of the present invention is as follows:
A kind of tunable narrow line optical fiber amplifier, the formation of this amplifier is: be core with the coupling mechanism, be followed successively by along input light path: array laser diode, pulse producer, stretcher, inclined to one side isolator and coupling mechanism, one of output terminal of this coupling mechanism this coupling mechanism that after the first polarization maintaining optical fibre bundle is contacted a modulator and Erbium-Doped Fiber Amplifier (EDFA), is coupled back again, another output terminal of this coupling mechanism is by the second polarization maintaining optical fibre bundle input modulator, again through wavelength division multiplexer, compressor reducer to receiver.
Described array laser diode is the linear array laser diode, or annulated column shape array laser diode, or rectangle array laser diode.
Described pulse producer is that direct impulse produces sine wave, square wave, triangular wave, positive and negative square wave, phase-locked, scanning frequency pulse generator.
Described stretcher is made of blazed grating and concave mirror and convex reflecting mirror.
Described inclined to one side isolator is made of polaroid and magneto optic isolator.
Described coupling mechanism is a double window single mode wide-band coupler.
Described polarization maintaining optical fibre bundle is by extinction ratio＞20dB, or＞25dB, or＞some high-quality polarization maintaining optical fibre wire jumpers formations of 30dB.
Described Erbium-Doped Fiber Amplifier (EDFA) is that long Er-doped fiber of 10-30m and pump light source are formed.
Described modulator is an electrooptic modulator, or magneto-optic modulator, or the polymkeric substance photomodulator, or semiconductor modulator.
Described wavelength division multiplexer is a relaying type wavelength division multiplexer, or the Add/drop wavelength type, or high-isolation type single-mode fiber multiplexer.
Described compressor reducer is made of concave surface blazed grating and concave mirror.
Described receiver is to can be CCD diode array detector, or photodiode, or photomultiplier, or the hyperchannel plate, or oscillograph, or computing machine, or operative installations.
The advantage of tunable narrow line optical fiber amplifier of the present invention:
Except that the harmonious narrow linewidth output of wavelength-tunable, whole amplifier is all solidified, and is simple in structure, easily operation.
Description of drawings:
Fig. 1 is a tunable narrow line optical fiber amplifier most preferred embodiment structural representation of the present invention.
Fig. 2 is a stretcher structural representation in the tunable narrow line optical fiber amplifier of the present invention.
Fig. 3 is a compressor configuration synoptic diagram in the tunable narrow line optical fiber amplifier of the present invention.
Among the figure: 1-array laser diode 2-pulse producer 3-stretcher 4-plays inclined to one side isolator 5-coupling mechanism 6-polarization maintaining optical fibre bundle 7-Erbium-Doped Fiber Amplifier (EDFA) 8-modulator 9-wavelength division multiplexer 10-modulator 11-compressor reducer 12-receiver 301-blazed grating 302-convex reflecting mirror 303-concave mirror 1101-concave surface blazed grating 1102, concave mirror
Embodiment:
See also Fig. 1 earlier, Fig. 1 is the structural representation of tunable narrow line optical fiber amplifier most preferred embodiment of the present invention, as seen from the figure, tunable narrow line optical fiber amplifier of the present invention, comprise that most crucial element is a coupling mechanism 5, be followed successively by along input light path: array laser diode 1, pulse producer 2, stretcher 3, play inclined to one side isolator 4 and coupling mechanism 5, an output terminal of coupling mechanism 5 connects modulator 8 and doped fiber amplifier 7 by polarization maintaining optical fibre bundle 6, polarization maintaining optical fibre bundle 6 connects from doped fiber amplifier 7 gets back to coupling mechanism 5, these coupling mechanism 5 another output terminals are by polarization maintaining optical fibre bundle 61 input modulators 9, again through wavelength division multiplexer 10, compressor reducer 11 is to receiver 12.
Said array laser diode 1 is the linear array laser diode, or annulated column shape array laser diode, or rectangle array laser diode.
Said pulse producer 2 is that direct impulse produces sine wave, square wave, triangular wave, positive and negative square wave, phase-locked, scanning frequency pulse generator.
Said stretcher 3 is made of blazed grating 301 and concave mirror 303 and convex reflecting mirror 302 as shown in Figure 2.
Said inclined to one side isolator 4 is made of polaroid and magneto optic isolator.
Said coupling mechanism 5 is double window single mode wide-band couplers.
Described polarization maintaining optical fibre bundle 6 is by extinction ratio＞20dB, or＞25dB, or＞some high-quality polarization maintaining optical fibre wire jumpers formations of 30dB.
Said Erbium-Doped Fiber Amplifier (EDFA) 7 is that long Er-doped fiber of 10-30m and pump light source are formed.
Said modulator 8 is electrooptic modulators, or magneto-optic modulator, or the polymkeric substance photomodulator, or semiconductor modulator.
Said wavelength division multiplexer 9 is relaying type wavelength division multiplexers, or the Add/drop wavelength type, or high-isolation type single-mode fiber multiplexer.
Said compressor reducer 11 is made of concave surface blazed grating 1101 and concave mirror 1102 as shown in Figure 3.
Said receiver 12 is to can be CCD diode array detector, or photodiode, or photomultiplier, or the hyperchannel plate, or oscillograph, or computing machine, or operative installations.
The course of work of tunable narrow line optical fiber amplifier of the present invention is:
When sending laser, array laser diode 1 produces pulse laser through pulse generator 2, through stretcher 3 the pulse laser broadening is become the chirped pulse laser signal again, this flashlight is through playing the chirped pulse flashlight that inclined to one side isolator 4 becomes linear polarization, this chirped pulse flashlight advances in the modulator 8 through 6 inputs of polarization maintaining optical fibre bundle after entering coupling mechanism 5, after modulated flashlight is amplified by Erbium-Doped Fiber Amplifier (EDFA) 7 again by in polarization maintaining optical fibre 6 input couplers 5, flashlight after the amplification is in coupling mechanism 5 and second polarization maintaining optical fibre, 61 incoming wave division multiplexers 9, again through modulator 10 modulation, compressing of broadening, be transported on the receiver 12 with the compressed again device 11 of amplifying signal light.
In device shown in Figure 1, the array laser diode is 10, and output wavelength is 1548nm, amplifying signal live width 5.6MHz, relative intensity 30dB.
Claims (9)
1, a kind of tunable narrow line optical fiber amplifier, the formation that it is characterized in that this amplifier is: with coupling mechanism (5) is core, be followed successively by along input light path: array laser diode (1), pulse producer (2), stretcher (3), play inclined to one side isolator (4) and coupling mechanism (5), one of output terminal of this coupling mechanism (5) is through the first polarization maintaining optical fibre bundle (6) polyphone modulator (8), Erbium-Doped Fiber Amplifier (EDFA) (7) this coupling mechanism (5) that is coupled back again, another output terminal of this coupling mechanism (5) is by second polarization maintaining optical fibre bundle (61) input modulator (9), again through wavelength division multiplexer (10), compressor reducer (11) is to receiver (12).
2, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described array laser diode (1) is the linear array laser diode, or annulated column shape array laser diode, or rectangle array laser diode.
3, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described pulse producer (2) is the generator that produces sine wave, square wave, triangular wave, positive and negative square wave, phase-locked or scanning frequency pulse with direct impulse.
4, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described stretcher (3) is made of blazed grating and concave mirror and convex reflecting mirror.
5, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described polarization maintaining optical fibre bundle (6) is that some polarization maintaining optical fibre wire jumpers by extinction ratio＞20dB constitute.
6, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described Erbium-Doped Fiber Amplifier (EDFA) is that long Er-doped fiber of 10-30m and pump light source are formed.
7, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described modulator (9) is an electrooptic modulator, or magneto-optic modulator, or the polymkeric substance photomodulator, or semiconductor modulator.
8, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described wavelength division multiplexer (10) is a relaying type wavelength division multiplexer, or the Add/drop wavelength type, or high-isolation type single-mode fiber multiplexer.
9, tunable narrow line optical fiber amplifier according to claim 1 is characterized in that described receiver (12) is a CCD diode array detector, or photodiode, or photomultiplier, or the hyperchannel plate, or oscillograph, or computing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410084637XA CN1295560C (en) | 2004-11-26 | 2004-11-26 | Tunable narrow line optical fiber amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410084637XA CN1295560C (en) | 2004-11-26 | 2004-11-26 | Tunable narrow line optical fiber amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1614497A CN1614497A (en) | 2005-05-11 |
| CN1295560C true CN1295560C (en) | 2007-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410084637XA Expired - Fee Related CN1295560C (en) | 2004-11-26 | 2004-11-26 | Tunable narrow line optical fiber amplifier |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730820B (en) * | 2013-11-29 | 2017-01-04 | 中国科学院西安光学精密机械研究所 | High-speed wideband narrow linewidth frequency sweep full-optical-fiber laser |
| CN110544868B (en) * | 2019-08-29 | 2021-03-23 | 武汉虹拓新技术有限责任公司 | Chirped square wave pulse amplification laser system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0563265A (en) * | 1991-08-30 | 1993-03-12 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber ring laser |
| US5239607A (en) * | 1992-06-23 | 1993-08-24 | Bell Communications Research, Inc. | Optical fiber amplifier with flattened gain |
| CN2265548Y (en) * | 1996-02-09 | 1997-10-22 | 清华大学 | Cascade optical fibre amplifier with distribution pumping |
| US6404541B2 (en) * | 2000-03-24 | 2002-06-11 | Oprel Technologies Inc. | Optical amplifier with active-fiber loop mirror |
| CN1448773A (en) * | 2003-04-24 | 2003-10-15 | 上海交通大学 | Low noise index gain blocked erbium-doped amplifier |
-
2004
- 2004-11-26 CN CNB200410084637XA patent/CN1295560C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0563265A (en) * | 1991-08-30 | 1993-03-12 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber ring laser |
| US5239607A (en) * | 1992-06-23 | 1993-08-24 | Bell Communications Research, Inc. | Optical fiber amplifier with flattened gain |
| CN2265548Y (en) * | 1996-02-09 | 1997-10-22 | 清华大学 | Cascade optical fibre amplifier with distribution pumping |
| US6404541B2 (en) * | 2000-03-24 | 2002-06-11 | Oprel Technologies Inc. | Optical amplifier with active-fiber loop mirror |
| CN1448773A (en) * | 2003-04-24 | 2003-10-15 | 上海交通大学 | Low noise index gain blocked erbium-doped amplifier |
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|---|---|
| CN1614497A (en) | 2005-05-11 |
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Granted publication date: 20070117 Termination date: 20101126 |