CN202749673U - Intermediate infrared super-continuum spectrum optical fiber laser device excited by super-continuum spectrum light source - Google Patents
Intermediate infrared super-continuum spectrum optical fiber laser device excited by super-continuum spectrum light source Download PDFInfo
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- CN202749673U CN202749673U CN 201220385208 CN201220385208U CN202749673U CN 202749673 U CN202749673 U CN 202749673U CN 201220385208 CN201220385208 CN 201220385208 CN 201220385208 U CN201220385208 U CN 201220385208U CN 202749673 U CN202749673 U CN 202749673U
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Abstract
The utility model provides an intermediate infrared super-continuum spectrum optical fiber laser device excited by a super-continuum spectrum light source and relates to the technical field of laser photoelectron. The intermediate infrared super-continuum spectrum fiber laser device specifically comprises a pulse optical fiber laser device, a quartz photonic crystal optical fiber and a chalcogenide glass optical fiber, wherein pulse laser emitted by the pulse optical fiber laser device through the quartz photonic crystal optical fiber is super-continuum spectrum laser with a wavelength range of 1000-2300nm, the super-continuum spectrum laser serves as an excitation source, excites the chalcogenide glass optical fiber in a cone-shaped structure or a photonic crystal optical fiber structure with air holes and produces intermediate infrared super-continuum spectrum laser with a wavelength range of 2000-5000nm to be output. The intermediate infrared super-continuum spectrum optical fiber laser device excited by the super-continuum spectrum light source is used for achieving output of the intermediate infrared super-continuum spectrum laser with high power and high coupling efficiency.
Description
Technical field
The utility model relates to the laser optoelectronic technical field, relate in particular to the excitation of a kind of super continuum source in infrared optical fiber laser with super continuous spectrum.
Background technology
Usually be wavelength that the wave band of 3 ~ 25 μ m is defined as middle-infrared band, wherein the mid-infrared laser of 3 ~ 5 mu m wavebands is used more extensive.The method that can realize at present 3 ~ 5 μ m Laser outputs mainly contains: optical parametric oscillator method, difference frequency generation, quantum cascade laser and gas laser.Utilize the optical parametric oscillator method to realize the middle-infrared band Laser output, need to use ultra-short pulse laser pumping source and nonlinear crystalline material to realize, cost is higher; Utilize the difference frequency generation method can only realize lower powered middle-infrared band Laser output, and conversion efficiency is low; Quantum cascade laser structure is relatively simple, and conversion efficiency is relatively high, but wavelength is untunable; The infrared-gas laser has CO gas laser and CO in typical
2Gas laser, but the shortcoming of gas laser is bulky, uses inconvenient.
Characteristics for the method for above several realization mid-infrared lasers, can utilize fiber laser to produce mid-infrared laser, the fiber laser volume is little, lightweight, conversion efficiency is high, easy to use and flexible, wavelength modulation range are large, can export the high-power laser of high light beam quality.Because the restriction of middle infrared material and doping process level, rare earth ion doped ZBLAN fiber laser development commonly used is comparatively ripe at present, but mostly be small-power output, and laser output wavelength is less than 4 μ m, the application greater than 4 μ m is restricted for the wavelength demand.
Utilize at present binary chalcogenide glass material optical fiber produce in also report to some extent of infrared excess continuous spectrum laser, but its driving source adopts Raman fiber lasers more or mixes the fiber laser of thulium, but the power output of this middle infrared optical fiber super continuous spectrums laser substantially all is the milliwatt magnitude, power output is low, can not realize powerful middle infrared excess continuous spectrum Laser output.
Therefore, instantly need a urgent technical problem that solves to be exactly: how a kind of effective measures can be proposed, with solve existing in the low and low problem of coupling efficiency of the power output of infrared optical fiber laser with super continuous spectrum.
The utility model content
The utility model provide the excitation of a kind of super continuum source in infrared optical fiber laser with super continuous spectrum, in order to solve existing in the low and low problem of coupling efficiency of the power output of infrared optical fiber laser with super continuous spectrum, realize the middle infrared excess continuous spectrum Laser output of high power and high coupling efficiency.
In order to solve the problems of the technologies described above, the utility model provide the excitation of a kind of super continuum source in infrared optical fiber laser with super continuous spectrum, comprise pulse optical fiber, quartzy photonic crystal fiber and chalcogenide glass fiber, wherein, the pulse laser that described pulse optical fiber sends, producing wave-length coverage by quartzy photonic crystal fiber is the super continuous spectrums laser of 1000 ~ 2300nm, described super continuous spectrums laser is as driving source, the excitation chalcogenide glass fiber, producing wavelength is the middle infrared excess continuous spectrum Laser output of 2000 ~ 5000nm.
Further, infrared optical fiber laser with super continuous spectrum also comprises amplifying stage in the described super continuum source excitation, and the pulse laser that pulse optical fiber sends is the super continuous spectrums laser of 1000 ~ 2300nm by quartzy photonic crystal fiber generation wave-length coverage again after entering amplifying stage.
Further, the cavity structure of described pulse optical fiber comprises F-P chamber, annular chamber and 8 letter lock mould annular chambers.
Further, described amplifying stage is one or more levels structure for amplifying, and the gain fibre that adopts comprises doubly clad optical fiber, the erbium ytterbium co doped double clad fiber of er-doped and mixes the doubly clad optical fiber of ytterbium.
Further, the wavelength of the semiconductor laser driving source that adopts according to the material decision self of employing gain fibre of described amplifying stage.
Further, the connected mode of described quartzy photonic crystal fiber and chalcogenide glass fiber is direct mechanical docking, direct welding or lens focus spatial coupling.
Further, when the zero-dispersion wavelength of described chalcogenide glass fiber material dispersion during less than or equal to 2300nm, described chalcogenide glass fiber is common single covering monomode fiber.
Further, when the zero-dispersion wavelength of described chalcogenide glass fiber material dispersion during greater than 2300nm, described chalcogenide glass fiber is to be provided with the pyramidal structure of cone section length and cone district core diameter or to be the photonic crystals optical fiber structure with airport.
Further, infrared optical fiber laser with super continuous spectrum also comprises condenser lens in the described super continuum source excitation, described condenser lens focuses on super continuous spectrums laser and is coupled to chalcogenide glass fiber to produce wavelength be the middle infrared excess continuous spectrum Laser output of 2000 ~ 5000nm, and described condenser lens plating is to the anti-reflection film of 1000-2300nm wavelength laser.
To sum up, use infrared excess continuous laser in the generation of super continuous laser source excitation chalcogenide glass fiber in the scheme described in the utility model, avoid using to reach high-power Raman fiber lasers and expensive thulium-doped fiber laser as driving source, adopts common ytterbium, er-doped or the erbium-ytterbium co-doped fiber mixed to realize that as gain fibre high power laser light exports; Adopt three kinds of coupled modes to realize the coupling of quartzy photonic crystal fiber and chalcogenide glass fiber:, if quartzy photonic crystal fiber and chalcogenide glass fiber adopt direct mechanical Butt-coupling mode, can reduce the welding difficulty, technique is very simple, if quartzy photonic crystal fiber and chalcogenide glass fiber adopt the welding mode can realize all optical fibre structure, easy to use and flexible, if one section fusing point matched fiber of welding can reduce to a certain extent splice loss, splice attenuation and improve coupling efficiency between quartzy photonic crystal fiber and chalcogenide glass fiber, if quartzy photonic crystal fiber and chalcogenide glass fiber adopt the lens space coupled modes, can realize the middle infrared excess continuous spectrum Laser output of high coupling efficiency.
Description of drawings
Fig. 1 be embodiment 1 of the present utility model the excitation of a kind of super continuum source in the structural representation of infrared optical fiber laser with super continuous spectrum;
Fig. 2 be embodiment 2 of the present utility model the excitation of a kind of super continuum source in the structural representation of infrared optical fiber laser with super continuous spectrum;
Fig. 3 is the pyramidal structure schematic diagram of the chalcogenide glass fiber described in the embodiment of the present utility model;
Fig. 4 is the photonic crystals optical fiber structure schematic diagram with airport of the chalcogenide glass fiber described in the embodiment of the present utility model.
Embodiment
Because chalcogenide glass has high index of refraction, high non-linearity characteristic, and have long long wavelength limit (〉 12 μ m) and lower phonon energy, therefore the utility model embodiment is used for chalcogenide glass fiber in the infrared optical fiber laser with super continuous spectrum, to realize more high power and the more Laser output of 3 ~ 5 mum wavelengths of high coupling efficiency.Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment 1:
As shown in Figure 1, the excitation of a kind of super continuum source in infrared optical fiber laser with super continuous spectrum specifically comprise pulse optical fiber 1, quartzy photonic crystal fiber 3 and chalcogenide glass fiber 4.
In the present embodiment, the laser of certain repetition rate that pulse optical fiber 1 sends, wavelength, pulsewidth, through quartzy photonic crystal fiber 3, produce near the super continuous spectrums output of wave-length coverage near-infrared, super continuous spectrums produces the longer super continuous spectrums output of wavelength through chalcogenide glass fiber 4.
In the present embodiment, quartzy photonic crystal fiber 3 can adopt direct mechanical to dock or directly welding with chalcogenide glass fiber 4.
More specifically, for this connected mode of direct welding, can quartzy photonic crystal fiber 3 and chalcogenide glass fiber 4 between one section fusing point matched fiber of welding, to reduce the fusing point loss and to improve coupling efficiency.
Preferably, when the zero-dispersion wavelength of the material dispersion of chalcogenide glass fiber 4 during less than or equal to 2300nm, chalcogenide glass fiber 4 is common single covering monomode fiber; And when the zero-dispersion wavelength of chalcogenide glass fiber 4 material dispersions during greater than 2300nm, the structure of chalcogenide glass fiber 4 is for as shown in Figure 3 the pyramidal structure that is provided with cone section length and cone district core diameter or be as shown in Figure 4 the photonic crystals optical fiber structure that is provided with airport.
More specifically, the wave-length coverage of the super continuous spectrums laser that quartzy photonic crystal fiber 3 produces is 1000 ~ 2300nm, also namely: near the wave-length coverage of the super continuous spectrums of this programme medium wavelength scope near-infrared is 1000 ~ 2300nm, and the wavelength of the super continuous spectrums that wavelength is longer is 2000 ~ 5000nm.
Embodiment 2:
As shown in Figure 2, the excitation of a kind of super continuum source in infrared optical fiber laser with super continuous spectrum comprise that pulse optical fiber 1, amplifying stage 2, quartzy photonic crystal fiber 3, chalcogenide glass fiber 4 and condenser lens 6 form.
In the present embodiment, the laser of certain repetition rate that pulse optical fiber 1 sends, wavelength, pulsewidth is amplified through amplifying stage 2 power, power is through the quartzy photonic crystal fiber 3 of laser process after amplifying, produce near the super continuous spectrums output of wave-length coverage near-infrared, super continuous spectrums laser focuses on through condenser lens 6 and is coupled to the longer super continuous spectrums output of chalcogenide glass fiber 4 generation wavelength.
Preferably, when the zero-dispersion wavelength of the material dispersion of chalcogenide glass fiber 4 during less than or equal to 2300nm, chalcogenide glass fiber 4 is common single covering monomode fiber; And when the zero-dispersion wavelength of chalcogenide glass fiber 4 material dispersions during greater than 2300nm, the structure of chalcogenide glass fiber 4 for as shown in Figure 3 be provided with cone section length and the pyramidal structure of cone district core diameter and photonic crystals optical fiber structure as shown in Figure 4.
Supplementary notes, in the accompanying drawing, 1, pulse optical fiber, 2, amplifying stage, 3, quartzy photonic crystal fiber, 4, chalcogenide glass fiber, 5, Output of laser, 6, condenser lens.
In this programme, pulse optical fiber 1 is selected the pulse optical fiber of different cavity structures according to the wavelength of the super continuous spectrums of output and the requirement of power, and its cavity structure comprises F-P chamber, annular chamber and 8 letter lock mould annular chambers.
Simultaneously, wavelength and the power of the super continuous spectrums that amplifying stage 2 is exported are as required selected one or more levels structure for amplifying, and the gain fibre that adopts comprises doubly clad optical fiber, the erbium ytterbium co doped double clad fiber of er-doped and mixes the doubly clad optical fiber of ytterbium.
Concrete, the gain fibre that amplifying stage 2 adopts according to self is different, and the semiconductor laser driving source wavelength that amplifying stage adopts according to self is also different.
Wherein, the connected mode of quartzy photonic crystal fiber 3 and chalcogenide glass fiber 4 is direct welding or spatial coupling.More specifically, described chalcogenide glass fiber 4 is for the pyramidal structure that is provided with cone section length and cone district core diameter or be as shown in Figure 4 the photonic crystals optical fiber structure that is provided with airport.
Simultaneously, condenser lens 6 can plate the anti-reflection film of 1000-2300nm wavelength laser to improve coupling efficiency.
Infrared optical fiber laser with super continuous spectrum in the excitation of super continuum source that the utility model provides and utilize at present MOPA structured optical fiber laser (pulse optical fiber 1 and amplifying stage 2) and quartzy photonic crystal fiber can realize the high-power near infrared band super continuous spectrums laser of generation utilizes this high power super continuous spectrums laser to encourage chalcogenide glass fiber can realize the super continuous spectrums laser of the middle-infrared band of high power (tens watts) as driving source.In addition, adopted in the light path that the utility model provides condenser lens in the coupling efficiency of infrared optical fiber laser with super continuous spectrum far above the coupling efficiency of infrared optical fiber laser with super continuous spectrum in the existing full optical fiber, have very large practicality.
Above infrared optical fiber laser with super continuous spectrum in the super continuum source provided by the utility model excitation is described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (9)
- Super continuum source excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, comprise pulse optical fiber, quartzy photonic crystal fiber and chalcogenide glass fiber, wherein, the pulse laser that described pulse optical fiber sends, producing wave-length coverage by quartzy photonic crystal fiber is the super continuous spectrums laser of 1000 ~ 2300nm, described super continuous spectrums laser is as driving source, the excitation chalcogenide glass fiber, producing wavelength is the middle infrared excess continuous spectrum Laser output of 2000 ~ 5000nm.
- Super continuum source according to claim 1 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, also comprise amplifying stage, the pulse laser that pulse optical fiber sends is the super continuous spectrums laser of 1000 ~ 2300nm by quartzy photonic crystal fiber generation wave-length coverage again after entering amplifying stage.
- Super continuum source according to claim 1 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, the cavity structure of described pulse optical fiber comprises F-P chamber, annular chamber and 8 letter lock mould annular chambers.
- Super continuum source according to claim 2 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, described amplifying stage is one or more levels structure for amplifying, and the gain fibre that adopts comprises doubly clad optical fiber, the erbium ytterbium co doped double clad fiber of er-doped and mixes the doubly clad optical fiber of ytterbium.
- Super continuum source according to claim 4 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that the wavelength of the semiconductor laser driving source that described amplifying stage adopts according to the material decision self of employing gain fibre.
- Super continuum source according to claim 1 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, the connected mode of described quartzy photonic crystal fiber and chalcogenide glass fiber is direct mechanical docking, direct welding or lens focus spatial coupling.
- Super continuum source according to claim 1 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, when the zero-dispersion wavelength of described chalcogenide glass fiber material dispersion during less than or equal to 2300nm, described chalcogenide glass fiber is common single covering monomode fiber.
- Super continuum source according to claim 1 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, when the zero-dispersion wavelength of described chalcogenide glass fiber material dispersion during greater than 2300nm, described chalcogenide glass fiber is to be provided with the pyramidal structure of cone section length and cone district core diameter or to be the photonic crystals optical fiber structure with airport.
- Super continuum source according to claim 1 excitation in infrared optical fiber laser with super continuous spectrum, it is characterized in that, also comprise condenser lens, described condenser lens focuses on super continuous spectrums laser and is coupled to chalcogenide glass fiber to produce wavelength be the middle infrared excess continuous spectrum Laser output of 2000 ~ 5000nm, and described condenser lens plating is to the anti-reflection film of 1000-2300nm wavelength laser.
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| CN 201220385208 CN202749673U (en) | 2012-08-03 | 2012-08-03 | Intermediate infrared super-continuum spectrum optical fiber laser device excited by super-continuum spectrum light source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505700A (en) * | 2014-12-16 | 2015-04-08 | 中国科学院上海光学精密机械研究所 | Method for generating intermediate infrared super-continuum spectrum |
| CN108512020A (en) * | 2017-09-22 | 2018-09-07 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
-
2012
- 2012-08-03 CN CN 201220385208 patent/CN202749673U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505700A (en) * | 2014-12-16 | 2015-04-08 | 中国科学院上海光学精密机械研究所 | Method for generating intermediate infrared super-continuum spectrum |
| CN104505700B (en) * | 2014-12-16 | 2017-10-20 | 中国科学院上海光学精密机械研究所 | In infrared super continuous spectrums production method |
| CN108512020A (en) * | 2017-09-22 | 2018-09-07 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
| CN108512020B (en) * | 2017-09-22 | 2019-06-25 | 中国人民解放军国防科技大学 | Incoherent super-continuum spectrum light source with controllable spectrum and tunable output power |
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