CN202183551U - Single longitudinal mode and narrow line width fiber laser - Google Patents
Single longitudinal mode and narrow line width fiber laser Download PDFInfo
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- CN202183551U CN202183551U CN2011203303489U CN201120330348U CN202183551U CN 202183551 U CN202183551 U CN 202183551U CN 2011203303489 U CN2011203303489 U CN 2011203303489U CN 201120330348 U CN201120330348 U CN 201120330348U CN 202183551 U CN202183551 U CN 202183551U
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Abstract
The utility model discloses a single longitudinal mode and narrow line width fiber laser. The fiber laser includes a pumping laser light source, an FBG (Fiber Bragg Grating) first cavity reflector, a gain medium laser resonator and an output FBG second cavity reflector. The FBG first cavity reflector is an FBG having high reflectance and composed of non polarization-maintaining fibers and a first temperature controller is disposed on the FBG first cavity reflector. The output FBG second cavity reflector is an FBG having lower reflectance and composed of polarization-maintaining fibers and a second temperature controller is disposed on the output FBG second cavity reflector. The gain medium laser resonator is an ultrahigh-concentration active rare earth doped gain fiber having a length of less than 10 cm and is provided with a cavity length adjuster composed of piezoelectric devices. The wave length of an output laser is 1.8 micrometers to 2.2 micrometers. The spectral line width of the laser is smaller than 100 kHz. The single longitudinal mode and narrow line width fiber laser in the utility model has advantages of simple systematic design, low cost, high reliability and the like and is a single longitudinal mode, narrow line width all-fiber laser capable of wavelength tuning and high power laser output. And the single longitudinal mode and narrow line width fiber laser in the utility model has practical value.
Description
Technical field
The utility model relates to a kind of fiber laser, relates in particular to a kind of laser with single longitudinal mode, narrow linewidth of full optical fiber.
Background technology
Narrow cable and wide optical fiber laser is meant the fiber laser of laser with the form output of single cavity internal vibration longitudinal mode; Its principal character is that the output laser linewidth is very narrow; Than also narrow two one magnitude of the live width of existing narrow linewidth dfb semiconductor laser, than narrow 5～6 one magnitude of the live width of DWDM signal optical source in the present optical communication network.The extremely narrow spectral line width of narrow linewidth single-longitudinal-mode fiber laser output makes laser beam have fabulous coherence, and its coherence length can reach more than 10,000 kilometers.Narrow cable and wide optical fiber laser has application extremely widely at superhigh precision and overlength distance laser ranging (high-precision laser radar), intersatellite communication and spacecraft launching site, atmospheric environment detection and fields such as research, distributing optical fiber sensing, oil and gas exploration and production, basic scientific research, security and military affairs.Because 2 micron wave length laser are middle infrared wavelengths; High-performance single longitudinal mode, ultra narrow spectral line width fiber laser have crucial application in fields such as security, defence military affairs, and research and development has single longitudinal mode, narrow cable and wide optical fiber laser and device fabrication line and is extremely important.
According to the laser technology basic theories, the short resonant cavity chamber length that reaches several cm can produce the single-frequency laser work of ultrastability and no mode hopping, makes output optical fibre laser can reach the spectral line width of hundreds of to the KHz magnitude.Obviously; Common doped fiber is because the concentration of thulium doped ion is very low; The gain that unit length is mixed the generation of thulium ion optical fiber does not reach the needed gain of laser far away; And be to reach laser to export needed gain and must use long gain fibre, this makes the laser longitudinal mode spacing greatly reduce, thereby is unfavorable for producing the narrow-linewidth laser output of compact conformation and high stable performance single longitudinal mode.Can find out that from above-mentioned super-narrow line width optical-fiber laser theory the research and development manufacturing of the thulium doped ion glass optical fiber of high concentration high efficiency has the decision meaning to single longitudinal mode, utmost point narrow linewidth, high-capacity optical fiber laser.
Although domestic research and development to narrow cable and wide optical fiber laser are paid much attention to always, some progress have also been obtained.But commercial in the market narrow cable and wide optical fiber laser is mainly 1.06 microns and 1.55 microns two kinds of wavelength.This patent proposes a kind of project organization of mixing the single longitudinal mode of the nearly 2 micron wave lengths output of having of thulium ion and thulium and holmium mixing and doping silicate glass optical fiber, extremely narrow spectral line width, wavelength tuning, high-capacity optical fiber laser based on the ultrahigh concentration high efficiency.
Summary of the invention
The goal of the invention of the utility model provides the full-optical-fiber laser of a kind of single longitudinal mode, extremely narrow spectral line width, the output of 1.8 to 2.2 micron wave length tuning lasers.
For reaching the foregoing invention purpose, the technical scheme that the utility model adopts is:
A kind of single longitudinal mode narrow cable and wide optical fiber laser; Comprise pumping laser light source, the fiber grating first cavity speculum, gain media laserresonator and the output optical fibre grating second cavity speculum; Wherein, The high reflectance fiber grating of the said fiber grating first cavity speculum for constituting by non-polarization maintaining optical fibre, the high reflectance fiber grating is provided with first temperature controller; The antiradar reflectivity fiber grating of the said output optical fibre grating second cavity speculum for constituting by polarization maintaining optical fibre, the antiradar reflectivity fiber grating is provided with second temperature controller; Said gain media laserresonator be length less than the active rare earth doped gain fibre of the ultrahigh concentration of 10cm, gain media laserresonator place is provided with the long adjuster in piezoelectricity chamber that piezoelectric device constitutes; Output optical maser wavelength is 1.8 microns to 2.2 microns, and the laser spectroscopy live width is less than 100kHz.
In the preceding text; Said pumping laser light source is made up of one or more semiconductor laser diodes; Its pumping laser that sends is coupled into the rare earth doped gain fibre as gain media through pumping configuration; Photon on the pumping wavelength is doped rare earth gain fibre medium and absorbs, and forms population inversion, and the light wave of stimulated emission forms laser output through the feedback and the vibration of the speculum at resonant cavity two ends.The fiber grating first cavity speculum, gain media laserresonator and the output optical fibre grating second cavity speculum constitute the full optical fiber laser chamber, produce single longitudinal mode, extremely narrow spectral line width, 2 microns (1.8 to 2.2 microns) wavelength laser outputs.The active rare earth doped gain fibre of said ultrahigh concentration is for mixing thulium (Tm
3+) or thulium/holmium (Tm
3+/ Ho
3+) mix silicate glass optical fiber altogether, can be to protect the inclined to one side single mode of inclined to one side or non-guarantor or the silicate glass optical fiber of multimode or the pumping of many coating, this silicate glass optical fiber can have the gain greater than 0.5 decibel/centimetre near 2 microns; High reflectance fiber grating (HR) is non-polarization-maintaining fiber grating, and antiradar reflectivity fiber grating (OC) is a polarization-maintaining fiber grating, realizes that through the temperature of regulating the control fiber grating single longitudinal mode, narrow linewidth and wavelength tuning are stablized output services in the chamber; Insert piezoelectric device in the chamber and change the tuning of the long realization output in chamber optical maser wavelength.
In the technique scheme, the said fiber grating first cavity speculum has high reflectance in the signal laser wavelength, and the said output optical fibre grating second cavity speculum has antiradar reflectivity in the signal laser wavelength.
In the technique scheme, different cavity structures can be adopted in the full optical fiber laser chamber, but its general plotting all belongs to the scope of technique scheme.The linear cavity structure that can adopt is listed below:
One segment length connects through the low loss fiber welding with an end of high reflectance fiber grating less than an end of the rare earth doped gain fibre of 10cm; Rare earth doped gain fibre absorbs the laser gain that produces the signal laser wavelength through nearly 793 nanometer pumping lasers of high reflectance fiber grating or 1550 nanometer pumping lasers;
Rare earth doped gain fibre is bonded on the long adjuster in piezoelectricity chamber of a piezoelectric device formation; Realize the long adjusting in chamber and then realize that output optical maser wavelength is tuning through regulation voltage;
The other end of rare earth doped gain fibre connects through the low loss fiber welding with an end of antiradar reflectivity fiber grating; The function of antiradar reflectivity fiber grating provides fiber laser second reflection chamber and controls the tuning output laser of tuning realization wavelength stabilization through temperature;
The other end of antiradar reflectivity fiber grating connects through the low loss fiber welding with the input of a fibre optic isolater; Fibre optic isolater prevents the influence of feedback laser to laser system, also can remove not absorptive pumping laser sometimes;
The other end of fibre optic isolater is the output of single longitudinal mode narrow-linewidth laser.
Because the technique scheme utilization, the utility model compared with prior art has advantage:
1. the utility model is to adopt short length (less than 10cm) ultrahigh concentration to mix thulium and thulium-holmium mixing and doping silicate glass optical fiber, has cavity length short, gain high, the little advantage of loss, thus the output spectrum good stability, spectrum line width; Output optical maser wavelength is 1.8 microns to 2.2 microns, and the laser spectroscopy live width is less than 100kHz.
2. adopt output antiradar reflectivity polarization-maintaining fiber grating OC can realize the stable single longitudinal mode of polarization, narrow-linewidth laser output, can stablize single longitudinal mode, narrow linewidth, the output of wavelength tuning laser through the temperature of polarization-maintaining fiber grating OC being controlled tuning realization;
3. introducing the long trim in piezoelectricity chamber in the chamber can realize the long adjusting in chamber and then realize stable single longitudinal mode, narrow linewidth, the tuning output of optical maser wavelength through regulation voltage;
4. the laser system cost is more cheap.Owing to adopt extremely short chamber long (less than 10cm), thereby the spectrum stability of output laser is good, spectrum line width.Avoided adopting complicated cavity design;
5. the reliability of system is higher.Adopt ultrahigh concentration to mix thulium and thulium-holmium mixing and doping silicate glass optical fiber, the structure of system is greatly simplified, and reliability is higher, is suitable as the cavity design of commercial fibres laser.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one.
Wherein: 1, pumping laser light source; 2, high reflectance fiber grating; 3, rare earth doped gain fibre; 4, the long adjuster in piezoelectricity chamber; 5, antiradar reflectivity fiber grating; 6, fibre optic isolater; 7 first temperature controllers; 8, second temperature controller.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment one: referring to accompanying drawing 1; The full-optical-fiber laser of a kind of single longitudinal mode, extremely narrow spectral line width, 2 microns (1.8 to 2.2 microns) wavelength laser outputs is to adopt short length (less than 10 centimetres) ultrahigh concentration to mix thulium silicate glass optical fiber to produce single longitudinal mode, extremely narrow spectral line width, high power, the output of 2 micron wave length tuning lasers, and the polarization-maintaining fiber grating that adopts high reflectance and antiradar reflectivity is to as linear cavity fiber laser cavity speculum and output coupler.Pumping laser enters into the short length ultrahigh concentration through the fiber grating at signal laser wavelength high reflectance and mixes thulium silicate glass optical fiber; Short length (less than 10cm) ultrahigh concentration is mixed the energy level number of ions counter-rotating on the signal laser wavelength produces of thulium silicate glass optical fiber absorptive pumping laser and is formed laser gain; The big longitudinal mode spacing of cavity that short length (less than 10cm) ultrahigh concentration is mixed thulium silicate glass optical fiber formation helps the single longitudinal mode laser generation, through can realize the tuning output of stabilizing wave lenth of laser to the long control of thermal tuning control and piezoelectricity chamber of output antiradar reflectivity polarization-maintaining fiber grating (OC).Its concrete annexation as shown in Figure 1 is: an end of locating to have the fiber grating 2 of high reflectance at signal laser wavelength (1.8 to 2.2 microns) is connected through fused fiber splice with the output optical fibre end of pumping laser light source 1; The other end of high reflectance fiber grating 2 is connected through welding with the end that one section short length (less than 10cm) ultrahigh concentration is mixed thulium silicate glass optical fiber (rare earth doped gain fibre 3), and pumping laser is gone into ultrashort length (less than 10cm) ultrahigh concentration and mixed in the thulium silicate glass optical fiber through high reflectance fiber grating 2 is laggard; Short length (less than 10cm) ultrahigh concentration produces laser gain in the signal laser wavelength after mixing thulium silicate glass optical fiber absorptive pumping laser; Short length (less than 10cm) ultrahigh concentration is mixed thulium silicate glass optical fiber 3 and is bonded on the long adjuster 4 in piezoelectricity chamber, regulates through the long output optical maser wavelength that realizes of voltage-regulation laser chamber; The other end that short length (less than 10cm) ultrahigh concentration is mixed thulium silicate glass optical fiber and the polarization-maintaining fiber grating of an antiradar reflectivity 5 are connected through fused fiber splice; Antiradar reflectivity polarization-maintaining fiber grating 5 forms the optical-fiber laser reflection chambers with high reflectance fiber grating 2, and is tuning through the tuning realization output of the control Wavelength of Laser to second temperature controller 8 of first temperature controller 7 of high reflectance fiber grating 2 and antiradar reflectivity polarization-maintaining fiber grating 5; Do not mixed pumping laser that thulium silicate glass optical fiber absorbs and be eliminated through behind pumping laser remover and the fibre optic isolater 6,2 microns laser of high power of the single longitudinal mode that produces in the laser chamber, narrow linewidth, wavelength tuning are exported through remover and fibre optic isolater 6.
Embodiment two: the full-optical-fiber laser of a kind of single longitudinal mode, extremely narrow spectral line width, 2 microns (1.8 to 2.2 microns) wavelength tuning laser outputs is 2 microns laser outputs of high power of adopting short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber to produce single longitudinal mode, extremely narrow spectral line width, wavelength tuning, and the polarization-maintaining fiber grating that adopts high reflectance and antiradar reflectivity is to as linear cavity fiber laser cavity speculum and output coupler.Pumping laser enters into short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber through the fiber grating at signal laser wavelength high reflectance; The energy level number of ions counter-rotating on the signal laser wavelength produces of short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber absorptive pumping laser forms laser gain; The big longitudinal mode spacing of cavity that short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber constitutes helps single longitudinal mode laser and produces, through regulating with the long output optical maser wavelength that realizes of voltage-regulation laser chamber the temperature control of antiradar reflectivity polarization-maintaining fiber grating is tuning.Its concrete annexation is: an end of locating to have the fiber grating of high reflectance at signal laser wavelength (1.8 to 2.2 microns) is connected through fused fiber splice with the output optical fibre end of pumping laser; The other end of high reflectance fiber grating is connected through welding with an end of one section short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber, and pumping laser is gone in ultrashort length ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber through the high reflectance fiber grating is laggard; Produce laser gain in the signal laser wavelength behind short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber absorptive pumping laser; Short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber is bonded on the long adjuster in piezoelectricity chamber, regulates through the long output optical maser wavelength that realizes of voltage-regulation laser chamber; The other end of short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber is connected through fused fiber splice with the polarization-maintaining fiber grating of an antiradar reflectivity; Antiradar reflectivity polarization-maintaining fiber grating and high reflectance fiber grating form the optical-fiber laser reflection chamber; Be not eliminated behind the pumping laser process remover of short length (less than 10cm) ultrahigh concentration thulium-holmium mixing and doping silicate glass optical fiber absorption and the fibre optic isolater, the single longitudinal mode that produces in the laser chamber, extremely narrow spectral line width, wavelength tuning, high power micron laser are exported through remover and fibre optic isolater.
Claims (2)
1. single longitudinal mode narrow cable and wide optical fiber laser; Comprise pumping laser light source (1), the fiber grating first cavity speculum, gain media laserresonator and the output optical fibre grating second cavity speculum; It is characterized in that: the high reflectance fiber grating (2) of the said fiber grating first cavity speculum for constituting by non-polarization maintaining optical fibre, high reflectance fiber grating (2) is provided with first temperature controller (7); The antiradar reflectivity fiber grating (5) of the said output optical fibre grating second cavity speculum for constituting by polarization maintaining optical fibre, antiradar reflectivity fiber grating (5) is provided with second temperature controller (8); Said gain media laserresonator be length less than the active rare earth doped gain fibre of 10cm (3), gain media laserresonator place is provided with the long adjuster in piezoelectricity chamber (4) that piezoelectric device constitutes; Output optical maser wavelength is 1.8 microns to 2.2 microns, and the laser spectroscopy live width is less than 100kHz.
2. single longitudinal mode narrow cable and wide optical fiber laser according to claim 1 is characterized in that: concrete cavity body structure comprises:
One segment length connects through the low loss fiber welding with an end of high reflectance fiber grating (2) less than an end of the rare earth doped gain fibre (3) of 10cm;
Rare earth doped gain fibre (3) is bonded on the long adjuster in piezoelectricity chamber (4) of a piezoelectric device formation;
The other end of rare earth doped gain fibre (3) connects through the low loss fiber welding with an end of antiradar reflectivity fiber grating (5);
The other end of antiradar reflectivity fiber grating (5) connects through the low loss fiber welding with the input of a fibre optic isolater (6);
The other end of fibre optic isolater (6) is the output of single longitudinal mode narrow-linewidth laser.
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| CN2011203303489U CN202183551U (en) | 2011-09-05 | 2011-09-05 | Single longitudinal mode and narrow line width fiber laser |
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| CN2011203303489U CN202183551U (en) | 2011-09-05 | 2011-09-05 | Single longitudinal mode and narrow line width fiber laser |
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| CN102780149A (en) * | 2012-07-25 | 2012-11-14 | 西安电子科技大学 | Optical-fiber side surface coupled laser diode pumped solid-state laser and manufacture technology |
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| CN102780149B (en) * | 2012-07-25 | 2014-08-13 | 西安电子科技大学 | Optical-fiber side surface coupled laser diode pumped solid-state laser and manufacture technology |
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| CN103236630A (en) * | 2013-05-05 | 2013-08-07 | 山东海富光子科技股份有限公司 | Single-frequency optical fiber laser using rare earth-doped quartz optical fiber as gain medium |
| CN103531994A (en) * | 2013-10-11 | 2014-01-22 | 山东海富光子科技股份有限公司 | Same-bandwidth pumping single-frequency optical fiber laser using erbium-doped quartz optical fiber as gain medium |
| WO2015106606A1 (en) * | 2014-01-17 | 2015-07-23 | 华南理工大学 | Tunable narrow-linewidth single-frequency linear-polarization laser device |
| US9787050B2 (en) | 2014-01-17 | 2017-10-10 | South China University Of Technology | Tunable narrow-linewidth single-frequency linear-polarization laser device |
| CN103825167B (en) * | 2014-02-12 | 2015-04-22 | 华南理工大学 | Continuously-tunable single-frequency optical fiber laser |
| CN103825166A (en) * | 2014-02-12 | 2014-05-28 | 华南理工大学 | High-precision and wide-tunability single-frequency optical fiber laser |
| CN103825167A (en) * | 2014-02-12 | 2014-05-28 | 华南理工大学 | Continuously-tunable single-frequency optical fiber laser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20120404 |