CN103872560A - Single-pumping semi-open cavity randomly-distributed feedback laser based on erbium-doped fiber - Google Patents
Single-pumping semi-open cavity randomly-distributed feedback laser based on erbium-doped fiber Download PDFInfo
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- CN103872560A CN103872560A CN201410100541.1A CN201410100541A CN103872560A CN 103872560 A CN103872560 A CN 103872560A CN 201410100541 A CN201410100541 A CN 201410100541A CN 103872560 A CN103872560 A CN 103872560A
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Abstract
The invention relates to a single-pumping semi-open cavity randomly-distributed feedback laser based on an erbium-doped fiber, and belongs to the technical field of fiber lasers. The laser comprises a fiber bragg grating, a pumping source, a wavelength division multiplexer, the erbium-doped fiber, a long-distance single-mode fiber and an FC/APC fiber connector. According to the laser, strong feedback is provided through the fiber bragg grating, gain amplification is provided by the erbium-doped fiber, and randomly-distributed optical feedback is provided by the long-distance single-mode fiber; when the total gain in the laser can counteract total loss, a pumping threshold value is reached, and random laser output is obtained; the power of the pumping source is continuously increased, and finally, stable laser output is obtained. The single-pumping semi-open cavity randomly-distributed feedback laser based on the erbium-doped fiber has the advantages of being low in pumping threshold value, simple in structure, low in cost and suitable for remote optical fiber sensing and the special field needing low-coherence laser light sources.
Description
Technical field
The present invention is specifically related to a kind of semi-open chamber of single pumping random distribution feedback laser based on Er-doped fiber, belongs to fiber laser technology field.
Background technology
Accidental laser, as a kind of microlaser of novelty, is bringing into play in many applications the effect that conventional laser can not be substituted.Therefore, accidental laser more and more gets more and more people's extensive concerning.In April, 2010, the mode of two directional pump in the middle of Turitsyn etc. adopt, utilizes Rayleigh scattering dorsad in optical fiber as feedback mechanism, successfully realize the stable output of laser, and definite designation is random distribution feedback laser (RDFL).It can provide the continuous laser output of irrelevant, non-mode competition, but has that pumping threshold power is high, energy conversion efficiency is low and the shortcoming such as single-mode optical fiber length is oversize.In August, 2011, the broad band wavelength that S.A.Babin etc. have realized random optical-fiber laser output based on Rayleigh scattering is adjustable, but still adopts the energisation mode of double pumping action.Chinese patent notification number CN102354900A, February 15 2012 day for announcing, name is called " a kind of random-distribution feedback optical fiber laser " and discloses employing double pumping action mode and realize random-distribution feedback optical fiber laser, adopts longer Er-doped fiber simultaneously, and cost is higher.Chinese patent notification number CN103378538A, October 30 2013 day for announcing, name is called " a kind of low threshold value random fiber laser of semi-open chamber " and discloses the accidental laser that utilizes single pumping, semi-open chamber mode to realize, but structure only provides Raman to amplify with general single mode fiber, lack efficient gain media, make the work threshold value of laser higher.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, proposed the semi-open chamber of the single pumping random distribution feedback laser based on Er-doped fiber, utilize fiber grating to provide strong feedback, Er-doped fiber to provide high-gain, long-range single mode fiber that random distribution feedback is provided.Its outstanding advantages be that pumping threshold is low, simple in structure, coherence is low and cost low etc.
The technical scheme that technical solution problem of the present invention is taked is as follows.
The semi-open chamber of single pumping random distribution feedback laser based on Er-doped fiber, comprise fiber grating, pumping source, wavelength division multiplexer, Er-doped fiber, long-range single mode fiber and FC/APC optical fiber splice, it is characterized in that wavelength division multiplexer is connected with fiber grating, pumping source and Er-doped fiber respectively, the other end of Er-doped fiber is connected with long-range single mode fiber, and the other end of long-range single mode fiber connects FC/APC optical fiber splice; At the laser of FC/APC optical fiber splice place stable output.
Operation principle of the present invention: as shown in Figure 1, the laser of pumping source output enters Er-doped fiber by wavelength division multiplexer, the Er in Er-doped fiber
3+after absorptive pumping light energy, produce the amplified spont-aneous emission light of wide range, wherein the part identical with fiber grating reflection wavelength is reflected back toward Er-doped fiber and obtains and amplify.Then this part light enters in long-range single mode fiber and transmits, and the part of Rayleigh scattering dorsad producing in transmitting procedure has spatially formed the light feedback of random distribution.This feedback mechanism and fiber grating form resonant cavity, when the laser power of pumping source output is enough high, make the gain that in laser, Er-doped fiber provides can overcome loss, will form laser, export from FC/APC optical fiber splice.
The present invention utilizes the mode in single pumping and semi-open chamber to realize reduction pumping threshold, shortens the object of single-mode optical fiber length and optimization laser structure; The advantage such as that this laser has is simple in structure, Output of laser coherence is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the semi-open chamber of the single pumping random distribution feedback laser based on Er-doped fiber.
Embodiment
Below in conjunction with accompanying drawing and example, the invention will be further described, but be not limited to this.
The embodiment of the present invention comprises fiber grating 1 as shown in Figure 1, pumping source 2, wavelength division multiplexer 3, Er-doped fiber 4, long-range single mode fiber 5 and FC/APC joint 6, it is characterized in that wavelength division multiplexer 3 is connected with fiber grating 1, pumping source 2, Er-doped fiber 4 respectively, the other end of Er-doped fiber 4 is connected with long-range single mode fiber 5, and the other end of long-range single mode fiber 5 connects FC/APC optical fiber splice 6; At the laser of FC/APC optical fiber splice 6 place's stable outputs.The spectrum of Output of laser and power characteristic available light spectrometer and light power meter observation.
Wherein, fiber grating 1, its reflectivity is higher than 90%, and centre wavelength is 1550nm, and three dB bandwidth is 0.2nm; Pumping source 2 is semiconductor lasers, and centre wavelength is 980nm, and power 0-400mW is adjustable; Wavelength division multiplexer 3, its operation wavelength is 980/1550nm; The length of Er-doped fiber 4 is 2m, and the absorption coefficient of 1530nm is about 11dB/m; Long-range single mode fiber 5 is G652 optical fiber, and length is 20km; FC/APC optical fiber splice 6, its insertion loss≤0.2dB, RL return loss >=60dB.
Claims (1)
1. the semi-open chamber of the single pumping random distribution feedback laser based on Er-doped fiber, comprise fiber grating, pumping source, wavelength division multiplexer, Er-doped fiber, long-range single mode fiber and FC/APC optical fiber splice, it is characterized in that wavelength division multiplexer is connected with fiber grating, pumping source and Er-doped fiber respectively, the other end of Er-doped fiber connects long-range single mode fiber, and the other end of long-range single mode fiber connects FC/APC optical fiber splice; At the laser of FC/APC optical fiber splice place stable output.
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| CN201410100541.1A CN103872560A (en) | 2014-03-14 | 2014-03-14 | Single-pumping semi-open cavity randomly-distributed feedback laser based on erbium-doped fiber |
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| CN201410100541.1A CN103872560A (en) | 2014-03-14 | 2014-03-14 | Single-pumping semi-open cavity randomly-distributed feedback laser based on erbium-doped fiber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852262A (en) * | 2015-06-17 | 2015-08-19 | 中国人民解放军国防科学技术大学 | Random optical fiber laser capable of achieving output of cylindrical vector polarization laser |
| CN106961066A (en) * | 2017-05-17 | 2017-07-18 | 河北大学 | A kind of multi-wavelength random fiber laser of partly beginning to speak based on overlapping fiber grating |
| CN106998030A (en) * | 2017-05-17 | 2017-08-01 | 河北大学 | A kind of half-open cavate linear polarization and super-narrow line width multi-wavelength random fiber laser |
| CN107749563A (en) * | 2017-11-16 | 2018-03-02 | 太原理工大学 | Single-slice integrated semiconductor accidental laser based on directional scatter |
| CN108565667A (en) * | 2018-03-27 | 2018-09-21 | 中国计量大学 | A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser |
| CN109632076A (en) * | 2019-01-31 | 2019-04-16 | 电子科技大学 | The amplification system and method for long-distance optical fiber distribution sound wave sensing |
| CN112186481A (en) * | 2020-11-09 | 2021-01-05 | 四川光盛物联科技有限公司 | Narrow-band low-noise random fiber laser Raman pumping light source |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354900A (en) * | 2011-11-09 | 2012-02-15 | 中国计量学院 | Random-distribution feedback optical fiber laser |
| CN103401131A (en) * | 2013-08-09 | 2013-11-20 | 电子科技大学 | Random fiber laser for hybrid of a special fiber and a standard single mode fiber |
-
2014
- 2014-03-14 CN CN201410100541.1A patent/CN103872560A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354900A (en) * | 2011-11-09 | 2012-02-15 | 中国计量学院 | Random-distribution feedback optical fiber laser |
| CN103401131A (en) * | 2013-08-09 | 2013-11-20 | 电子科技大学 | Random fiber laser for hybrid of a special fiber and a standard single mode fiber |
Non-Patent Citations (1)
| Title |
|---|
| A. E. EL-TAHER ET AL.: "Effect of Rayleigh-scattering distributed feedback on multiwavelength Raman fiber laser generation", 《OPTICS LETTERS》, vol. 36, no. 2, 15 January 2011 (2011-01-15) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852262A (en) * | 2015-06-17 | 2015-08-19 | 中国人民解放军国防科学技术大学 | Random optical fiber laser capable of achieving output of cylindrical vector polarization laser |
| CN106961066A (en) * | 2017-05-17 | 2017-07-18 | 河北大学 | A kind of multi-wavelength random fiber laser of partly beginning to speak based on overlapping fiber grating |
| CN106998030A (en) * | 2017-05-17 | 2017-08-01 | 河北大学 | A kind of half-open cavate linear polarization and super-narrow line width multi-wavelength random fiber laser |
| CN107749563A (en) * | 2017-11-16 | 2018-03-02 | 太原理工大学 | Single-slice integrated semiconductor accidental laser based on directional scatter |
| CN108565667A (en) * | 2018-03-27 | 2018-09-21 | 中国计量大学 | A kind of feedback-enhanced erbium-doped nonlinear fiber grating accidental laser |
| CN109632076A (en) * | 2019-01-31 | 2019-04-16 | 电子科技大学 | The amplification system and method for long-distance optical fiber distribution sound wave sensing |
| CN112186481A (en) * | 2020-11-09 | 2021-01-05 | 四川光盛物联科技有限公司 | Narrow-band low-noise random fiber laser Raman pumping light source |
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Application publication date: 20140618 |