CN202906186U - Multi-wavelength erbium-doped photonic crystal fiber laser - Google Patents
Multi-wavelength erbium-doped photonic crystal fiber laser Download PDFInfo
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- CN202906186U CN202906186U CN 201220365468 CN201220365468U CN202906186U CN 202906186 U CN202906186 U CN 202906186U CN 201220365468 CN201220365468 CN 201220365468 CN 201220365468 U CN201220365468 U CN 201220365468U CN 202906186 U CN202906186 U CN 202906186U
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Abstract
The utility model is applicable to the technical field of fiber laser design, and provides a multi-wavelength erbium-doped photonic crystal fiber laser. The multi-wavelength erbium-doped photonic crystal fiber laser comprises a pumping source and a unidirectional ring resonator, wherein the unidirectional ring resonator comprises a wavelength division multiplexer arranged on a transmission channel of pumping light from the pumping source, an erbium-doped photonic crystal fiber used as gain medium, a polarization dependent isolator, a polarization controller, and a coupler, a first output end of the coupler is connected with the wavelength division multiplexer; the wavelength division multiplexer, the erbium-doped photonic crystal fiber, the polarization dependent isolator, the polarization controller, and the coupler are sequentially arranged in a closed ring along the laser transmission direction in the unidirectional ring resonator. Compared with the prior art, based on the non-linear polarization rotation principle, the multi-wavelength erbium-doped photonic crystal fiber laser obtains the stable and adjustable multi-wavelength output, and also has other advantages of simple structure, low cost and convenient operation. The multi-wavelength erbium-doped photonic crystal fiber laser is especially suitable for simultaneously measuring the concentrations of several gases in a gas sensor.
Description
Technical field
The utility model belongs to the fiber laser design field, relates in particular to a kind of multi-wavelength er-doped Photonic Crystal Fiber Lasers.
Background technology
In recent years, in the technical fields such as spectrum, optical communication, optical instrument test, Fibre Optical Sensor, multiple-wavelength laser was widely used.
Known ground, the multiwavelength laser implement body that prior art provides comprises following several types:
The first multiple-wavelength laser is the wavelength Raman fiber laser.From the nineties in last century, Raman fiber lasers and amplifier begin to receive much concern, and become one of study hotspot of fibre-optical active component.
The second multiple-wavelength laser is the multi-wavelength semiconductor fiber laser.
The third multiple-wavelength laser is multi-wavelength hybrid gain fiber laser.
The 4th kind of multiple-wavelength laser is common erbium doped fiber laser.
All there is the problem that complex structure, cost are high, temperature stability is low and capability of resistance to radiation is weak in the above-mentioned multi-wavelength optical fiber laser that prior art provides.
The utility model content
The purpose of this utility model is to provide a kind of multi-wavelength er-doped Photonic Crystal Fiber Lasers, is intended to solve the multi-wavelength er-doped Photonic Crystal Fiber Lasers complex structure that prior art provides, the problem that cost is high, temperature stability is low and capability of resistance to radiation is weak.
The utility model is to realize like this, a kind of multi-wavelength er-doped Photonic Crystal Fiber Lasers, comprise pumping source and unidirectional loop resonant cavity, described unidirectional loop resonant cavity comprises wavelength division multiplexer, the er-doped photonic crystal fiber as gain media, polarization relative photo isolator, Polarization Controller, the coupler that places on the pump light transmission channel that described pumping source sends, and the first output of described coupler connects described wavelength division multiplexer;
Described wavelength division multiplexer, described er-doped photonic crystal fiber, described polarization relative photo isolator, described Polarization Controller and described coupler are along the direction of laser transmission in described unidirectional loop resonant cavity closed loop arrangement in turn.
Wherein, described pumping source is that peak power output can be the 980nm semiconductor laser of 500mW.
Wherein, described wavelength division multiplexer can be a 980/1550nm wavelength division multiplexer.
Wherein, described er-doped photonic crystal fiber can be that a length is that 9m, core diameter are 4um, and the airport diameter is 2um, and pitch of holes is 4um, and mode field diameter is 4.34um, and erbium ion-doped concentration is the photonic crystal fiber of 1000ppm.
Wherein, described coupler can be the coupler of a 10:90, and the second output of described coupler connects a spectrometer simultaneously.
Wherein, described Polarization Controller works in the 1550nm wave band, and being provided with three optical path differences is λ/4, λ/2, the crank of λ/4.
Above-mentioned multi-wavelength er-doped Photonic Crystal Fiber Lasers is integrated in the gas sensor.
The multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides is based on the nonlinear polarization rotation principle, in annular chamber, adopted polarization relative photo isolator and high birefringence er-doped photonic crystal fiber to consist of the birefringent light fiber filter, the non-homogeneous loss that the nonlinear polarization rotation effect is induced can reduce the mode competition of Er-doped fiber under the normal temperature, obtains to stablize adjustable multi-wavelength output.In addition, because photonic crystal fiber has overcome stress and doping problem in the traditional fiber, therefore possesses good temperature stability, low to radiation, magnetic field and extraneous stress sensitive degree, and design freedom is large, have high double refractive inde thereby can obtain unique optical characteristics by the flexible design structural parameters, thereby possess the potentiality of development high-performance Er-Doped superfluorescent fiber source.In sum, the multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides can also be realized the switching output of wavelength when obtaining to stablize adjustable multi-wavelength output, have simple in structure, cost is low, the advantage such as easy to operate, and possesses good temperature stability, low to radiation, magnetic field and extraneous stress sensitive degree, design freedom is large.In the fields of measurement of Fibre Optical Sensor multi-parameter, have potential application, be specially adapted in the gas sensor to measure when realizing mixed gas composition analysis and multiple gases concentration.
Description of drawings
Fig. 1 is the structure chart of the multi-wavelength er-doped Photonic Crystal Fiber Lasers that provides of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The baroque problem of multi-wavelength er-doped Photonic Crystal Fiber Lasers that provides for prior art, the multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides is based on the nonlinear polarization rotation principle, in annular chamber, adopted polarization relative photo isolator and high birefringence er-doped photonic crystal fiber to consist of the birefringent light fiber filter, the non-homogeneous loss that the nonlinear polarization rotation effect is induced can reduce the mode competition of Er-doped fiber under the normal temperature, obtains to stablize adjustable multi-wavelength output.
Fig. 1 shows the structure of the multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides, and for convenience of explanation, only shows the part relevant with the utility model.
The multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides comprises: pumping source 11 is used for the pump light that output has the first wave long value; And place unidirectional loop resonant cavity 12 on the pump light transmission channel, be used for exporting after pump light with pumping source 11 outputs converts single wavelength laser or multiwavelength laser to.Unidirectional loop resonant cavity 12 wherein specifically comprises: place the wavelength division multiplexer 121 on the pump light transmission channel; As the er-doped photonic crystal fiber 122 of gain media, be used for and convert the flashlight with Second Wave long value to through the pump light with first wave long value of wavelength division multiplexer 121 outputs; Polarization relative photo isolator 123 is used for converting the flashlight with Second Wave long value after 122 conversions of er-doped photonic crystal fiber to different wave length linearly polarized light; Polarization Controller 124 is used for that the linearly polarized light with different wave length after 123 conversions of polarization relative photo isolator is carried out polarization state and regulates the elliptically polarized light of output different polarization states; Coupler 125, the first output of coupler 125 connects wavelength division multiplexer 121, be used for the part elliptically polarized light output with each polarization state of Polarization Controller 124 outputs, and another part elliptical polarization of each polarization state of Polarization Controller 124 outputs is optically coupled into wavelength division multiplexer 121.
The multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides is to have adopted polarization relative photo isolator 123 and high birefringence er-doped photonic crystal fiber 122 to consist of optical fiber filter in annular chamber.Polarization relative photo isolator 123 wherein is equivalent to the combination of polarizer and optical isolator, and difference is, the polarizer and isolator is integrated, reduces loss; The loss of 123 pairs of different polarization states light of polarization relative photo isolator is different, the difference of polarization state can be converted to the difference of loss; Different phase shifts can occur in the linearly polarized light through the different wave length of polarization relative photo isolator 123 output by Polarization Controller 124 time, thereby because the difference that polarization state changes forms the elliptically polarized light of different polarization states.Synthetic polarization state is rotated along with the propagation of light, and the angle of rotation is relevant with luminous intensity.Afterwards, by regulating the azimuth of wave plate in the Polarization Controller 124, can realize the output arranged side by side of single wavelength output or multi-wavelength and wavelength and the quantity that changes output light-wave.With respect to prior art, the multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides is when obtaining to stablize adjustable multi-wavelength output, simple in structure, cost is low, easy to operate, simultaneously, owing to adopted the er-doped photonic crystal fiber 122 with high birefringence coefficient, make and omitted polarization maintaining optical fibre in the resonant cavity, thereby simplified light-source structure, simultaneously so that this multi-wavelength er-doped Photonic Crystal Fiber Lasers also has the temperature stability height, low to radiation, magnetic field and extraneous stress sensitive degree, the advantage such as design freedom is large.In the fields of measurement of Fibre Optical Sensor multi-parameter, have potential application, be specially adapted in the gas sensor to measure when realizing multiple gases concentration.
Wherein, wavelength division multiplexer 121, er-doped photonic crystal fiber 122, polarization relative photo isolator 123, Polarization Controller 124 and coupler 125 are along the direction (that is: direction shown in the empty arrow among Fig. 1) of laser transmission in the unidirectional loop resonant cavity 12 closed loop arrangement in turn.
Wherein, the polarization loss of polarization relative photo isolator 123 and isolation loss can be 35dB and 25dB respectively, and the effect that it both can play the polarizer can guarantee the light path one-way transmission again.
Wherein, can be provided with three cranks on the Polarization Controller 124, the optical path difference of three cranks is λ/4, λ/2, λ/4.Wherein, the relevant isolator of described polarization and high birefringence er-doped photonic crystal fiber consist of the birefringent light fiber filter, realize multi-wavelength output.
Preferably, pumping source 11 is that a peak power output is the 980nm semiconductor laser of 500mW; Wavelength division multiplexer 121 is one 980/1550 wavelength division multiplexers; Er-doped photonic crystal fiber 122 is the long photonic crystal fibers of a 9m, and the erbium ion-doped concentration of er-doped photonic crystal fiber 122 is 1000ppm; The insertion loss of polarization relative photo isolator 123 is that 0.5dB, polarization loss are that 25dB, isolation are 58dB; The operation wavelength of Polarization Controller 124 is 1550nm; Coupler 125 is couplers of a 10:90; The second output of coupler 125 connects a spectrometer.
At this moment, the operation principle of the multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides is: the wavelength that pumping source 11 sends is that the pump light of 980nm enters unidirectional loop resonant cavity 12 by wavelength division multiplexer 121, it is the flashlight of 1550nm that this pump light produces wavelength through photonic crystal fiber, this wavelength is that the flashlight of 1550nm is behind polarization relative photo isolator 123, the cut-in operation wavelength is the Polarization Controller 124 of 1550nm, carry out tuning by the wave plate azimuth of regulating Polarization Controller 124 to wavelength, access the coupler 125 of 10:90 through the light of Polarization Controller 124, coupler 125 will be coupled into wavelength division multiplexer 121 through 90% of the light of Polarization Controller 124 and form the closed annular chambeies, and will output to spectrometer through 10% of the light of Polarization Controller 124 and carry out spectrum analysis.
The multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides has adopted polarization relative photo isolator 123 and high birefringence er-doped photonic crystal fiber 122 to consist of optical fiber filter in annular chamber, overcome the mode competition of er-doped photonic crystal fiber under the normal temperature by polarization rotation effect, obtain to stablize adjustable multi-wavelength output.In addition, because photonic crystal fiber has overcome stress and doping problem in the traditional fiber, therefore possesses good temperature stability, low to radiation, magnetic field and extraneous stress sensitive degree, and design freedom is large, have high double refractive inde thereby can obtain unique optical characteristics by the flexible design structural parameters, thereby possess the potentiality of development high-performance Er-Doped superfluorescent fiber source.In sum, the multi-wavelength er-doped Photonic Crystal Fiber Lasers that the utility model provides can also be realized the switching output of wavelength when obtaining to stablize adjustable multi-wavelength output, have simple in structure, cost is low, the advantage such as easy to operate, and possesses good temperature stability, low to radiation, magnetic field and extraneous stress sensitive degree, design freedom is large.In the fields of measurement of Fibre Optical Sensor multi-parameter, have potential application, be specially adapted in the gas sensor to measure when realizing mixed gas composition analysis and multiple gases concentration.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. multi-wavelength er-doped Photonic Crystal Fiber Lasers, comprise pumping source and unidirectional loop resonant cavity, it is characterized in that, described unidirectional loop resonant cavity comprises wavelength division multiplexer, the er-doped photonic crystal fiber as gain media, polarization relative photo isolator, Polarization Controller, the coupler that places on the pump light transmission channel that described pumping source sends, and the first output of described coupler connects described wavelength division multiplexer.
Described wavelength division multiplexer, described er-doped photonic crystal fiber, described polarization relative photo isolator, described Polarization Controller and described coupler are along the direction of laser transmission in described unidirectional loop resonant cavity closed loop arrangement in turn.
2. multi-wavelength er-doped Photonic Crystal Fiber Lasers as claimed in claim 1 is characterized in that, described pumping source is that peak power output is the 980nm semiconductor laser of 500mW.
3. multi-wavelength er-doped Photonic Crystal Fiber Lasers as claimed in claim 1 is characterized in that, described wavelength division multiplexer is a 980/1550nm wavelength division multiplexer.
4. multi-wavelength er-doped Photonic Crystal Fiber Lasers as claimed in claim 1, it is characterized in that, described er-doped photonic crystal fiber is that a length is 9m, core diameter is 4um, the airport diameter is 2um, pitch of holes is 4um, and mode field diameter is 4.34um, and erbium ion-doped concentration is the photonic crystal fiber of 1000ppm.
5. multi-wavelength er-doped Photonic Crystal Fiber Lasers as claimed in claim 1 is characterized in that, described coupler is the coupler of a 10:90, and the second output of described coupler connects a spectrometer.
6. multi-wavelength er-doped Photonic Crystal Fiber Lasers as claimed in claim 1 is characterized in that described Polarization Controller works in the 1550nm wave band, and being provided with three optical path differences is λ/4, λ/2, the crank of λ/4.
7. multi-wavelength er-doped Photonic Crystal Fiber Lasers as claimed in claim 1 is characterized in that, the relevant isolator of described polarization and high birefringence er-doped photonic crystal fiber consist of the birefringent light fiber filter.
8. such as each described multi-wavelength er-doped Photonic Crystal Fiber Lasers of claim 1 to 7, it is characterized in that described multi-wavelength er-doped Photonic Crystal Fiber Lasers is integrated in the gas sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220365468 CN202906186U (en) | 2012-07-26 | 2012-07-26 | Multi-wavelength erbium-doped photonic crystal fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220365468 CN202906186U (en) | 2012-07-26 | 2012-07-26 | Multi-wavelength erbium-doped photonic crystal fiber laser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283096A (en) * | 2014-10-21 | 2015-01-14 | 天津理工大学 | Multi-wavelength Er-doped optical fiber laser device with wavelength interval continuously adjustable |
| CN105048268A (en) * | 2015-08-26 | 2015-11-11 | 广东量泽激光技术有限公司 | Integrated phase biasing device and optical fiber laser employing same |
| CN107968312A (en) * | 2018-01-15 | 2018-04-27 | 深圳大学 | One kind mixes bait Photonic Crystal Fiber Lasers |
| CN113036587A (en) * | 2021-02-07 | 2021-06-25 | 中国科学院合肥物质科学研究院 | Amplified mid-infrared laser based on erbium-doped single crystal fiber seed light source |
-
2012
- 2012-07-26 CN CN 201220365468 patent/CN202906186U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283096A (en) * | 2014-10-21 | 2015-01-14 | 天津理工大学 | Multi-wavelength Er-doped optical fiber laser device with wavelength interval continuously adjustable |
| CN105048268A (en) * | 2015-08-26 | 2015-11-11 | 广东量泽激光技术有限公司 | Integrated phase biasing device and optical fiber laser employing same |
| CN107968312A (en) * | 2018-01-15 | 2018-04-27 | 深圳大学 | One kind mixes bait Photonic Crystal Fiber Lasers |
| CN107968312B (en) * | 2018-01-15 | 2023-12-05 | 深圳大学 | Erbium-doped photonic crystal fiber laser |
| CN113036587A (en) * | 2021-02-07 | 2021-06-25 | 中国科学院合肥物质科学研究院 | Amplified mid-infrared laser based on erbium-doped single crystal fiber seed light source |
| CN113036587B (en) * | 2021-02-07 | 2022-07-01 | 中国科学院合肥物质科学研究院 | Amplified mid-infrared laser based on erbium-doped single crystal fiber seed light source |
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