CN104852270A - Overlapped grating and chirped grating-based dual-wavelength narrow-linewidth fiber laser - Google Patents
Overlapped grating and chirped grating-based dual-wavelength narrow-linewidth fiber laser Download PDFInfo
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- CN104852270A CN104852270A CN201510227768.7A CN201510227768A CN104852270A CN 104852270 A CN104852270 A CN 104852270A CN 201510227768 A CN201510227768 A CN 201510227768A CN 104852270 A CN104852270 A CN 104852270A
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Abstract
The invention discloses an overlapped grating and chirped grating-based dual-wavelength narrow-linewidth fiber laser. The overlapped grating and chirped grating-based dual-wavelength narrow-linewidth fiber laser comprises a pumping source, a dual-wavelength overlapped grating, an erbium doped fiber, a chirped grating, a spectrograph and a stress adjusting device. According to the overlapped grating and chirped grating-based dual-wavelength narrow-linewidth fiber laser of the invention, the overlapped grating and the chirped grating are adopted as wavelength selection devices, and therefore, structural simplicity and dual-wavelength laser output can be realized; and the spectrum analyzer is adopted to perform measurement, and the minimum wavelength resolution of an output spectrum is 0.01nm; the overlapped grating and the chirped grating form a resonant cavity, and therefore, connection loss is small, and parameter adjustment is flexible; and the whole device is compact and reliable, and has great application potential in the aspect of optical fiber system integration.
Description
Technical field
The present invention relates to a kind of fiber-grating laser manufacture technology field, particularly a kind of dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating.
Background technology
Overlapping grating is a kind of important optical element, and the same position of optical fiber can hold the fiber grating of more different wave lengths, saves space, good stability.As a kind of wavelength selecting device of fiber laser of novelty, can realize the quick and precisely selection of wavelength, make whole laser output wavelength more stable, manufacturing process is more simple, and structure is compacter, more economical.In fields such as DWDM optical fiber telecommunications system, Fibre Optical Sensor, optical device and radars, there is wide application prospect.
Current people have proposed the multiple method realizing dual wavelength narrow cable and wide optical fiber laser, but the defect existed is: Output of laser is unstable, laser structure is complicated, laser volume is large, Output of laser live width is wider, hinders the development of dual wavelength narrow cable and wide optical fiber laser.
Summary of the invention
Instant invention overcomes deficiency of the prior art, aim to provide that a kind of structure is simple, stable performance, cost are low based on the dual wavelength narrow cable and wide optical fiber laser of overlapping grating and chirp grating, to overcome the shortcoming that existing dual wavelength narrow cable and wide optical fiber laser exists.
For the problems referred to above that existing dual wavelength narrow linewidth laser exists, the invention provides a kind of compact conformation, compact, ambient stable work, output performance reliably based on the dual wavelength narrow cable and wide optical fiber laser of overlapping grating and chirp grating.
In order to solve the technical problem of above-mentioned existence, the present invention is realized by following technical scheme:
Based on a dual wavelength narrow cable and wide optical fiber laser for overlapping grating and chirp grating, comprise pumping source, dual wavelength overlapping grating, Er-doped fiber, chirp grating, spectrometer and answer apparatus for adjusting force; The peak reflectivity of the overlapping grating of described dual wavelength is all higher than 99%, and peak wavelength is respectively λ
1and λ
2, the wavelength interval between two gratings is sub-nanometer scale; Described chirped grating reflection wave band covers λ
1to λ
2, and during by inscribing, spectrum assignment realizes wavelength X
1to λ
2between exist reflectivity depression; One end of the overlapping grating of described dual wavelength is directly connected with pumping source, and its other end is connected with described Er-doped fiber; One end of described chirp grating is connected with Er-doped fiber, and its other end is that output is connected to spectrometer; The overlapping grating of described dual wavelength and described chirp grating form the resonant cavity of laser, and this resonant cavity is linear cavity; The overlapping grating of described dual wavelength and described chirp grating realize the wavelength chooses of laser; The overlapping grating of described dual wavelength is by the method for UV mask, and on optical fiber same position, multiexposure, multiple exposure is prepared from; When described chirp grating is by inscribing, spectrum assignment realizes wavelength X
1to λ
2between exist reflectivity depression; Described chirped fiber grating, by controlling the stress be applied on chirp grating, regulates the gain in laser cavity, and the gain balance realizing dual wavelength is penetrated with stablizing to swash; Described Er-doped fiber realizes the amplification of laser; The doping content of described Er-doped fiber and Er-doped fiber adjustable length;
Described chirp grating two ends are equipped with and are answered apparatus for adjusting force; Connect between described device and all adopt monomode fiber welding;
Described pumping source is 980nm LD, and its peak power output is 750mW; Described Er-doped fiber is that high concentration erbium doped fiber is as gain fibre; Its output spectrum minimum wavelength resolution is 0.01nm.
The process of a kind of dual wavelength narrow cable and wide optical fiber laser Laser output laser based on overlapping grating and chirp grating of the present invention:
1. pumping source, dual wavelength overlapping grating, Er-doped fiber and chirp grating are accessed Optical Maser System successively;
2. open pumping source, increase the power output of pumping source gradually until inspire laser, observe output spectrum by spectrometer;
3., by gain balance technology, regulate cavity loss to make the gain at starting of oscillation wavelength place equal with loss, thus multi-wavelength oscillation under realizing room temperature.
Owing to adopting technique scheme, a kind of dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating provided by the invention, compared with prior art has such beneficial effect:
The present invention adopts the overlapping grating of dual wavelength and chirp grating as wavelength selecting device, and structure is simple, can realize dual-wavelength laser and export, and adopting spectroanalysis instrument to measure its output spectrum minimum wavelength resolution is 0.01nm.The overlapping grating of dual wavelength and chirp grating form resonant cavity, and junction loss is little, and parameter adjustment is flexible.Whole apparatus structure small and exquisite reliable, in fibre system is integrated, have huge application potential.
Accompanying drawing explanation
Fig. 1 is the structural representation of laser of the present invention;
Fig. 2 is the reflectance spectrum of the overlapping grating of dual wavelength of the present invention;
Fig. 3 is the reflectance spectrum of chirp grating of the present invention;
Fig. 4 is that the present invention stablizes twin wavelength laser output spectrogram.
In figure, 1: pumping source; 2: the overlapping grating of dual wavelength; 3: Er-doped fiber; 4: chirp grating; 5: spectrometer; 6: answer apparatus for adjusting force.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
Based on a dual wavelength narrow cable and wide optical fiber laser for overlapping grating and chirp grating, as shown in Figure 1, it comprises pumping source 1, dual wavelength overlapping grating 2, Er-doped fiber 3, chirp grating 4, spectrometer 5 and answers apparatus for adjusting force 6 its structural representation; The peak reflectivity of the overlapping grating 2 of described dual wavelength is all higher than 99%, and peak wavelength is respectively λ
1and λ
2, the wavelength interval between two gratings is sub-nanometer scale; Described chirp grating 4 reflected waveband covers λ
1to λ
2, and during by inscribing, spectrum assignment realizes wavelength X
1to λ
2between exist reflectivity depression; One end of the overlapping grating 2 of described dual wavelength is directly connected with pumping source 1, and its other end is connected with described Er-doped fiber 3; One end of described chirp grating 4 is connected with Er-doped fiber 3, and its other end is that output is connected to spectrometer 5; The overlapping grating 2 of described dual wavelength and described chirp grating 4 form the resonant cavity of laser, and this resonant cavity is linear cavity; The overlapping grating 2 of described dual wavelength and described chirp grating 4 realize the wavelength chooses of laser; The overlapping grating 2 of described dual wavelength is by the method for UV mask, and on optical fiber same position, multiexposure, multiple exposure is prepared from; When described chirped fiber grating 4 is by inscribing, spectrum assignment realizes wavelength X
1to λ
2between exist reflectivity depression; Described chirped fiber grating 4, by controlling the stress be applied on chirp grating, regulates the gain in laser cavity, and the gain balance realizing dual wavelength is penetrated with stablizing to swash; Described Er-doped fiber 3 realizes the amplification of laser; The doping content of described Er-doped fiber 3 and Er-doped fiber adjustable length;
Described chirp grating 4 two ends are equipped with and are answered apparatus for adjusting force 6; Connect between described device and all adopt monomode fiber welding;
Described pumping source 1 is 980nm LD, and its peak power output is 750mW; Described Er-doped fiber 3 is that high concentration erbium doped fiber is as gain fibre; Its output spectrum minimum wavelength resolution is 0.01nm.
The process of Output of laser of the present invention is:
Step 1: in the laser structure schematic diagram shown in Fig. 1, the overlapping grating 2 of welding dual wavelength and chirp grating 4 form the resonant cavity of dual wavelength fibre laser respectively at the two ends of Er-doped fiber 3, centre wavelength is the other end input of pumping source 1 from the overlapping grating 2 of dual wavelength of 980nm, the other end of chirp grating 4 is the output of laser, be connected to spectrometer 5, test output spectrum.Wherein, the reflectance spectrum of the overlapping grating 2 of dual wavelength and chirp grating 4 respectively as shown in Figures 2 and 3.
Step 2: open pumping source 1, the light that pumping source 1 sends is coupled in resonant cavity by the overlapping grating 2 of dual wavelength, then light constantly reflects and obtains gain in the resonant cavity that the overlapping grating 2 of dual wavelength and chirp grating 4 form, when the gain of the light of constantly reflection is greater than loss in resonant cavity, produce laser.
Step 3: in the stress application system shown in Fig. 1, adjustment counterweight, accurate control is applied to the stress of chirp grating 4 both sides with reflectivity depression, mate by chirp grating 4 grating 2 overlapping with dual wavelength wavelength reflection the gain balance reaching two different wave length laser in resonant cavity, finally realize dual-wavelength laser outgoing under room temperature.As shown in Figure 4, wherein optical maser wavelength is respectively 1556.872nm and 1557.000nm to the laser output spectrum figure observed by spectrometer.
Above to invention has been detailed description; its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (1)
1. based on a dual wavelength narrow cable and wide optical fiber laser for overlapping grating and chirp grating, it is characterized in that: it comprises pumping source, dual wavelength overlapping grating, Er-doped fiber, chirp grating, spectrometer and answers apparatus for adjusting force; The peak reflectivity of the overlapping grating of described dual wavelength is all higher than 99%, and peak wavelength is respectively λ
1and λ
2, the wavelength interval between two gratings is sub-nanometer scale; Described chirped grating reflection wave band covers λ
1to λ
2, and during by inscribing, spectrum assignment realizes wavelength X
1to λ
2between exist reflectivity depression; One end of the overlapping grating of described dual wavelength is directly connected with pumping source, and its other end is connected with described Er-doped fiber; One end of described chirp grating is connected with Er-doped fiber, and its other end is that output is connected to spectrometer; The overlapping grating of described dual wavelength and described chirp grating form the resonant cavity of laser, and this resonant cavity is linear cavity; The overlapping grating of described dual wavelength and described chirp grating realize the wavelength chooses of laser; The overlapping grating of described dual wavelength is by the method for UV mask, and on optical fiber same position, multiexposure, multiple exposure is prepared from; When described chirp grating is by inscribing, spectrum assignment realizes wavelength X
1to λ
2between exist reflectivity depression; Described chirped fiber grating, by controlling the stress be applied on chirp grating, regulates the gain in laser cavity, and the gain balance realizing dual wavelength is penetrated with stablizing to swash; Described Er-doped fiber realizes the amplification of laser; The doping content of described Er-doped fiber and Er-doped fiber adjustable length;
Described chirp grating two ends are equipped with and are answered apparatus for adjusting force; Connect between described device and all adopt monomode fiber welding;
Described pumping source is 980nm LD, and its peak power output is 750mW; Described Er-doped fiber is that high concentration erbium doped fiber is as gain fibre; Its output spectrum minimum wavelength resolution is 0.01nm.
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| CN201510227768.7A CN104852270B (en) | 2015-05-07 | 2015-05-07 | Dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating |
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| CN201510227768.7A CN104852270B (en) | 2015-05-07 | 2015-05-07 | Dual wavelength narrow cable and wide optical fiber laser based on overlapping grating and chirp grating |
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| CN104852270B CN104852270B (en) | 2018-12-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742948A (en) * | 2016-04-29 | 2016-07-06 | 燕山大学 | Tunable fiber laser based on fiber Bragg grating |
| CN111183381A (en) * | 2018-06-04 | 2020-05-19 | 直观外科手术操作公司 | Overlapping fiber grating |
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| US20050063430A1 (en) * | 2003-09-18 | 2005-03-24 | Universite Laval | Multi-wave length laser source |
| US20050259697A1 (en) * | 2004-05-24 | 2005-11-24 | Korea Institute Of Science And Technology | Raman or erbium-doped fiber laser using few-mode fiber grating, and long-distance remote sensor for simultaneously measuring temperature and strain by separating temperature and strain components using the same |
| CN101159365A (en) * | 2007-09-27 | 2008-04-09 | 中国人民解放军空军工程大学 | Multi-path optical fiber laser coherent beam combination device and coherent beam combination method |
| CN101424771A (en) * | 2007-10-30 | 2009-05-06 | 骆飞 | Optical fiber grating tuning device and optical systems |
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2015
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| US20050063430A1 (en) * | 2003-09-18 | 2005-03-24 | Universite Laval | Multi-wave length laser source |
| US20050259697A1 (en) * | 2004-05-24 | 2005-11-24 | Korea Institute Of Science And Technology | Raman or erbium-doped fiber laser using few-mode fiber grating, and long-distance remote sensor for simultaneously measuring temperature and strain by separating temperature and strain components using the same |
| CN101159365A (en) * | 2007-09-27 | 2008-04-09 | 中国人民解放军空军工程大学 | Multi-path optical fiber laser coherent beam combination device and coherent beam combination method |
| CN101424771A (en) * | 2007-10-30 | 2009-05-06 | 骆飞 | Optical fiber grating tuning device and optical systems |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742948A (en) * | 2016-04-29 | 2016-07-06 | 燕山大学 | Tunable fiber laser based on fiber Bragg grating |
| CN111183381A (en) * | 2018-06-04 | 2020-05-19 | 直观外科手术操作公司 | Overlapping fiber grating |
| US11506519B2 (en) | 2018-06-04 | 2022-11-22 | Intuitive Surgical Operations, Inc. | Overlapping fiber gratings |
| US11815371B2 (en) | 2018-06-04 | 2023-11-14 | Intuitive Surgical Operations, Inc. | Overlapping fiber gratings |
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| CN104852270B (en) | 2018-12-07 |
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