CN103368056B - Multi-wave-length laser switching and outputting device - Google Patents
Multi-wave-length laser switching and outputting device Download PDFInfo
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- CN103368056B CN103368056B CN201310308351.4A CN201310308351A CN103368056B CN 103368056 B CN103368056 B CN 103368056B CN 201310308351 A CN201310308351 A CN 201310308351A CN 103368056 B CN103368056 B CN 103368056B
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Abstract
The invention discloses a multi-wave-length laser switching and outputting device which comprises a fundamental frequency laser source, multiple frequency multiplication devices, multiple electro-optical devices, multiple polarizers and one output window. The fundamental frequency laser source is used for producing fundamental frequency light. The frequency multiplication devices are used for producing multi-frequency multiplication light. The electro-optical devices rotate the polarization direction of the light under the control of voltage. The polarizers are used for performing high reflection on the light in the preset polarization direction and performing high transmission on the light in the direction vertical to the preset polarization direction. The output window is used for outputting the fundamental frequency light or the multi-frequency multiplication light, and one of the fundamental frequency light and the multi-fundamental frequency light can be output by the output window by exerting voltage or not exerting voltage on one or more electro-optical devices. According to the multi-wave-length laser switching and outputting device with the scheme, a nonlinear crystal and a spectroscopic lens do not need to be moved, and various wave lengths can be output along the same output optical path and through the same light outlet hole. In addition, lasers of all wave lengths can be output to the maximum.
Description
Technical field
The present invention relates to field of laser device technology, particularly a kind of multiwavelength laser switches output device.
Background technology
Along with the fast development of laser technology, various laser obtains in fields such as industry, scientific research, national defence, medical science, amusements respectively and applies more and more widely.In these fields, there is higher requirement to the convenience that is comprehensive and that use of the function of laser.Itself have simultaneously or alternately export the laser of multi-wavelength's laser, because it has the multiple application function that multi-wavelength brings, becoming the object of numerous Institutions Development.
In existing technology, as shown in Figure 1, a kind of traditional laser multi-wavelength way of output comprises basic frequency laser light source 11, two frequency-doubling crystals 121 thereafter and frequency tripling crystal 122, first spectroscope 131, second spectroscope 132 and laser absorption body 14, second spectroscope 132 is placed on the reverberation circuit of the first spectroscope 131, and other parts are placed on the incident light axis of LASER Light Source 11 successively.During work, the fundamental frequency light that basic frequency laser light source 11 sends is through the nonlinear effect of two frequency-doubling crystals 121 and frequency tripling crystal 122, be partially converted to two frequency doubled lights and frequency tripling light, again through the light splitting of the first spectroscope 131 and the second spectroscope 132, by frequency tripling light output, it is inner that basic frequency laser and two double-frequency lasers then incide laser absorption body 14.By that analogy, by changing nonlinear crystal and spectroscope, fundamental frequency light and two frequency doubled lights can be exported respectively.Fundamental frequency light and two, frequency tripling light all can separately along same output light path, export through same light hole.
Said apparatus, when carrying out wavelength and switching, not only needs ceaselessly to change various spectroscope by mechanical means, requires the mechanical translator with precision, also needs moved into by nonlinear crystal frequently and withdraw from light path.If such as will basic frequency laser be exported, need two frequency-doubling crystals and frequency tripling crystal all to withdraw from light path, then the spectroscope changed for frequency tripling light is the spectroscope for fundamental frequency light; By that analogy, if need output two double-frequency laser, need frequency tripling crystal to withdraw from light path, then to change frequency tripling spectroscope be two frequency multiplication spectroscopes.Due to nonlinear crystal under normal circumstances frequency translation efficiency to level and luffing angle responsive, therefore move at crystal and withdraw from the process of light path, need the precision optical machinery device guarantee with very high degree of precision in mobile front and back, the angle of crystal remains unchanged, otherwise can affect each crystal reset after frequency translation efficiency, and the precision optical machinery device of this very high degree of precision is often very expensive and be difficult to ensure the accuracy stability of long-term work.Moreover, so many immigration be completed and withdraw from action, needing incidentally many precision optical machinery devices and control device, considerably increase the cost of laser equipment, reduce the global reliability of equipment.
In the prior art, as shown in Figure 2, another traditional laser multi-wavelength way of output comprises basic frequency laser light source 21, two frequency-doubling crystals 221 thereafter and frequency tripling crystal 222, first, second spectroscope 231,232, be placed on the incident light axis of LASER Light Source 21 successively with upper-part, the 3rd spectroscope 233 and the 4th spectroscope 234 are placed on the reverberation circuit of the first spectroscope 231 and the second spectroscope 232 respectively.First 231 pairs, spectroscope frequency tripling light high reverse--bias, to fundamental frequency light and two frequency doubled light height transmissions; Second spectroscope 232 is to two frequency doubled light high reverse--bias, to the transmission of fundamental frequency light height.3rd 233 pairs, spectroscope frequency tripling light high reverse--bias; 4th spectroscope 234 is to two frequency doubled light high reverse--bias.During work, utilize each spectroscopical light splitting function, export fundamental frequency light, two frequency doubled lights and frequency tripling light simultaneously.Each nonlinear crystal does not need moved into frequently and withdraw from light path.But fundamental frequency light, frequency doubled light and frequency tripling light but export, through three light-emitting windows along different optical axises.Can comparatively trouble when this changes out optical wavelength in actual use, must again to aim at, the whole external transmission of adjustment laser and control light path again.Simultaneously, the fundamental frequency light obtained is the residue laser after experienced by two frequencys multiplication and frequency tripling conversion, two frequency doubled lights obtained are the residue laser after experienced by frequency tripling conversion, power can have than initial condition and significantly reduces, reduce the range of application of laser, be unfavorable for the multifunctional application of laser equipment.
Summary of the invention
The object of this invention is to provide one and neither need mobile nonlinear crystal and light splitting eyeglass, can ensure that again multi-wavelength is along same output light path, export through same light hole, and the multiwavelength laser that can export each wavelength laser to greatest extent switches output device.
For this reason, the present invention proposes a kind of multiwavelength laser and switch output device, it comprises:
Basic frequency laser source, it is for generation of fundamental frequency light;
Multiple frequency doubling device, it is for generation of multiple frequence light;
Multiple electro-optical device, it rotates polarisation of light direction under voltage control;
Multiple polarizer, it is for the light high reverse--bias to predetermined polarisation direction, to the light height transmission perpendicular to predetermined direction polarization; An output window, it is for exporting fundamental frequency light or multiple frequence light;
Wherein, by applying voltage to wherein one or more electro-optical devices described or not applying voltage, the one in output window output fundamental frequency light or multiple frequence light is made.
The invention has the beneficial effects as follows and provide one neither to need mobile nonlinear crystal and light splitting eyeglass, can ensure that again multi-wavelength is along same output light path, export through same light hole, and the multiwavelength laser that can export each wavelength laser to greatest extent switches output device.Make multiple-wavelength laser when practical application, do not need to use the precision optical machinery device with very high degree of precision, greatly reduce manufacture difficulty and cost; Do not need again to aim at, adjustment external transmission controls light path, can switch, export fully the laser of each wavelength easily at any time, under various operating state and condition.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of multiwavelength laser way of output in prior art;
Fig. 2 is the structural representation of the another kind of multiwavelength laser way of output in prior art;
Fig. 3 is the structural representation that multiwavelength laser of the present invention switches output device.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
Fig. 3 shows the multiwavelength laser switching output device structure chart that the present invention proposes.As shown in Figure 3, this multiwavelength laser switching output device comprises:
One basic frequency laser source 31, it is for the obtain polarization direction linear polarization fundamental frequency light of (be parallel to paper and perpendicular to light) in the horizontal direction, and fundamental frequency light wavelength is 1064nm;
First electro-optical device 321, it is for playing the effect in rotatory polarization direction to described linear polarization fundamental frequency light, include electrooptic crystal KDP (potassium dihydrogen phosphate), two logical optical surfaces are all coated with the high transmission rete to 1064nm fundamental frequency light, by machine exterior drive source by applying voltage control (not shown) to crystal, by applying certain voltage, the polarization direction half-twist of incident linear polarization 1064nm fundamental frequency light can be made;
Described linear polarization fundamental frequency 1064nm light is carried out to the first polarizer 331, second polarizer 332 and the 3rd polarizer 333 of polarization, this three polarizer to the linear polarization 1064nm light high reverse--bias of polarization direction vertically (perpendicular to paper), to the linear polarization 1064nm light height transmission of polarization direction (be parallel to paper and perpendicular to light) in the horizontal direction;
First spectroscope 351, for fundamental frequency 1064nm light high reverse--bias;
For generation of two frequency doubling devices 341 of two frequency multiplication 532nm laser, it produces two frequency doubled lights after receiving fundamental frequency light, adopt non-critical type I type-Ⅱphase matching LBO (three lithium borates) crystal, two logical optical surfaces are coated with fundamental frequency 1064nm, two frequency multiplication 532nm laser height transmission retes.
For the second electro-optical device 322 being played rotatory polarization effect by remaining linear polarization fundamental frequency light after described two frequency doubling devices 341, include electrooptic crystal KDP (potassium dihydrogen phosphate), two logical optical surfaces are all coated with the high transmission rete to fundamental frequency 1064nm laser, by machine exterior drive source by applying voltage control (not shown) to crystal, by applying certain voltage, the incident polarization direction half-twist by remaining linear polarization fundamental frequency 1064nm laser after two frequency doubling devices 341 can be made;
Second spectroscope 352 and the 3rd spectroscope 353, it is for fundamental frequency 1064nm light high reverse--bias;
4th spectroscope 354 and the 5th spectroscope 355, it is for fundamental frequency 1064nm light high reverse--bias; For two frequency multiplication 532nm light height transmissions;
For generation of the frequency tripling device 342 of frequency tripling 355nm laser, it produces frequency tripling light after receiving fundamental frequency light and two frequency doubled lights, it is coated with fundamental frequency 1064nm, two frequency multiplication 532nm, frequency tripling 355nm laser height transmission rete with critical type II type-Ⅱphase matching LBO (three lithium borates) crystal, two logical optical surfaces;
6th spectroscope 356, for fundamental frequency 1064nm light and two frequency multiplication 532nm light high reverse--bias, to the transmission of frequency tripling 355nm light height;
Described two frequency multiplication 532nm light are played to the 3rd electro-optical device 323 of rotatory polarization effect, include electrooptic crystal KDP (potassium dihydrogen phosphate), two logical optical surfaces are all coated with the high transmission rete to two frequency multiplication 532nm laser, by machine exterior drive source by applying voltage control (not shown) to crystal, by applying certain voltage, the polarization direction half-twist of incident linear polarization two frequency multiplication 532nm laser can be made;
Described two frequency multiplication 532nm light are carried out to the 4th polarizer 334 of polarization, this polarizer to the linear polarization 532nm light high reverse--bias of polarization direction vertically (perpendicular to paper), to the linear polarization two frequency multiplication 532nm light height transmission of polarization direction (be parallel to paper and perpendicular to light) in the horizontal direction;
7th spectroscope 357, for two frequency multiplication 532nm light high reverse--bias, for the transmission of fundamental frequency 1064nm light height;
8th spectroscope 358, for two frequency multiplication 532nm light high reverse--bias;
9th spectroscope 359, for two frequency multiplication 532nm light high reverse--bias, for fundamental frequency 1064nm light and the transmission of frequency tripling 355nm light height;
First absorber 361, for receiving the fundamental frequency 1064nm light that the 3rd polarizer 333 reflects;
Second absorber 362, for receiving the fundamental frequency 1064nm light of the 7th spectroscope 357 transmission;
3rd absorber 363, for receiving the two frequency multiplication 532nm light that the 4th polarizer 334 reflects; These three absorbers are used for absorbing remaining laser, avoid laser to reveal and cause danger.
Diaphragm 37, various wavelength laser is all final to be exported from this diaphragm, and this diaphragm is for fundamental frequency 1064nm, two frequency multiplication 532nm, the transmission of frequency tripling 355nm laser height.
In above-mentioned multiple device, the first electro-optical device 321, first polarizer 331, two frequency doubling device 341, the 4th spectroscope 354, the 5th spectroscope 355, frequency tripling device 342, the 6th spectroscope 356, the 9th spectroscope 359 and diaphragm 37 are placed in the light path of described basic frequency laser source 31 bright dipping successively; Second polarizer 332 is positioned on the reflected light path of described first polarizer 331; Described first spectroscope 351 is placed on the reflected light path of described second polarizer 332, and the reflected light path of the first spectroscope 351 is incident on the 6th spectroscope 356; Described second spectroscope 352 is placed on the reflected light path of described 4th spectroscope 354, and the second electro-optical device 322 is positioned on the reflected light path of described second spectroscope 352; 3rd polarizer 333 is positioned on the emitting light path of described second electro-optical device 322; First absorber 361 is positioned on the reflected light path of described 3rd polarizer 333; Described 3rd spectroscope 353 is positioned on the transmitted light path of described 3rd polarizer 333, and its reflected light path is incident to the 5th spectroscope 355; Described 6th spectroscope 356 and described 7th spectroscope 357 are positioned on the reflected light path of the first spectroscope 351 successively; Described second absorber 362 is positioned on the transmitted light path of described 7th spectroscope 357; Described 3rd electro-optical device 323 is positioned on the reflected light path of described 7th spectroscope 357, and described 4th polarizer 334 is positioned on the emitting light path of described 3rd electro-optical device, and described 3rd absorber 363 is positioned on the reflected light path of described 4th polarizer 334; Described 8th spectroscope 358 is positioned on the transmitted light path of the 4th polarizer 334, and its reflected light path is incident on the 9th spectroscope 359.
Adopt device of the present invention, the method realizing multiwavelength laser switching output is as follows:
Structure accordingly, puts each device successively, and first, second, third electro-optical device 321,322,323 does not all apply voltage, makes it not change incident linear polarization fundamental frequency 1064nm light and the polarization direction of two frequency multiplication 532nm laser.Now open lasing light emitter 31, then the fundamental frequency 1064nm laser of its polarization direction of launching (be parallel to paper and perpendicular to light) in the horizontal direction enters two frequency doubling devices 341 by transmission after the first polarizer 331, obtains two frequency multiplication 532nm laser of polarization direction vertically (perpendicular to paper).Now remaining fundamental frequency 1064nm light is by the 4th spectroscope 354, after second spectroscope 352 high reverse--bias, by the high transmission of the 3rd polarizer 333 after the second electro-optical device 322, frequency tripling device 342 is entered again via after the 3rd spectroscope 353 and the 5th spectroscope 355 high reverse--bias, and two frequency multiplication 532nm laser are by also entering frequency tripling device 342 after the 4th spectroscope 354 and the high transmission of the 5th spectroscope 355, fundamental frequency 1064nm light and two frequency multiplication 532nm light produce frequency tripling 355nm light in frequency tripling device 342, via the 6th spectroscope 356, after the high transmission of 9th spectroscope 359, by diaphragm 37 outgoing, and by remaining fundamental frequency 1064nm light after frequency tripling device 342, via the 6th spectroscope 356 high reverse--bias, the high transmission of 7th spectroscope 357 enters the second absorber 362, remaining two frequency multiplication 532nm light are via after the 6th spectroscope 356 and the 7th spectroscope 357 high reverse--bias, the 3rd absorber 363 is entered by the 4th polarizer 334 high reverse--bias after the 3rd electro-optical device 323, so what finally export from diaphragm 37 is simple frequency tripling 355nm light.
Pass through external drive source, second electro-optical device 322 applies voltage, it is made to be become vertically (perpendicular to paper) by fundamental frequency 1064nm laser polarization direction half-twist passed through, 3rd electro-optical device 323 applies voltage, the two frequency multiplication 532nm laser polarization direction half-twists passed through are become in the horizontal direction (be parallel to paper and perpendicular to light), now after the second electro-optical device 322, enter first absorber 361 by the 3rd polarizer 333 high reverse--bias by remaining fundamental frequency 1064nm light after two frequency doubling devices 341, the two frequency multiplication 532nm light produced do not produce frequency translation through frequency tripling device 342 separately, after height is transmitted through, after the 6th spectroscope 356 and the 7th spectroscope 357 high reverse--bias, by the high transmission of the 4th polarizer 334 behind the 3rd electro-optical device 323 rotatory polarization direction, diaphragm 37 outgoing is passed through via after the 8th spectroscope 358 and the 9th spectroscope 359 high reverse--bias, finally from diaphragm 37 output is two simple frequency multiplication 532nm light.
By the drive source of laser external, first electro-optical device 321 applies voltage, it is made to be become vertically (perpendicular to paper) by fundamental frequency 1064nm laser polarization direction half-twist passed through, then its fundamental frequency 1064nm laser launched is by the first polarizer 331 high reverse--bias, by the second polarizer 332, first spectroscope 351, the 6th spectroscope 356 high reverse--bias by after the high transmission of the 9th spectroscope 359, export via window 37, thus device obtains simple fundamental frequency 1064nm Laser output thus;
Light is 45 ° for the incidence angle of described first spectroscope 351, second spectroscope 352, the 3rd spectroscope 353, the 4th spectroscope 354, the 5th spectroscope 355, the 6th spectroscope 356, the 7th spectroscope 357, the 8th spectroscope 358, the 9th spectroscope 359 minute surface, and the high transmission that each spectroscope minute surface is coated with, high reverse--bias rete be condition premised on angle of incidence of light 45 ° all.
The switching between wavelength can be carried out by the real-time drive source by controlling laser external easily between above three kinds of working methods, do not need mobile any nonlinear crystal and light splitting eyeglass, can ensure that again multi-wavelength is along same output light path, export through same light hole, and each wavelength laser can be exported to greatest extent.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. multiwavelength laser switches an output device, and it comprises:
Basic frequency laser source, it is for generation of fundamental frequency light;
Multiple frequency doubling device, it is for generation of multiple frequence light; Described multiple frequency doubling device comprises two frequency doubling devices and frequency tripling device;
Multiple electro-optical device, it rotates polarisation of light direction under voltage control; Described multiple electro-optical device comprises the first electro-optical device, the second electro-optical device and the 3rd electro-optical device;
Multiple polarizer, it is for the light high reverse--bias to predetermined polarisation direction, to the light height transmission perpendicular to predetermined direction polarization; An output window, it is for exporting fundamental frequency light or multiple frequence light; Described multiple polarizer comprises the first polarizer, the second polarizer, the 3rd polarizer and the 4th polarizer;
Multiple spectroscope, for fundamental frequency light or multiple frequence light high reverse--bias or high transmission; Described multiple spectroscope comprises the first spectroscope, the second spectroscope, the 3rd spectroscope, the 4th spectroscope, the 5th spectroscope, the 6th spectroscope, the 7th spectroscope, the 8th spectroscope and the 9th spectroscope;
Three absorbers, i.e. the first absorber, the second absorber and the 3rd absorber, it is respectively used to, when exporting fundamental frequency light or multiple frequence light, absorb unnecessary fundamental frequency light or multiple frequence light;
Wherein, by applying voltage to wherein one or more electro-optical devices described or not applying voltage, the one in output window output fundamental frequency light or multiple frequence light is made;
Wherein, described first electro-optical device, the first polarizer, two frequency doubling devices, the 4th spectroscope, the 5th spectroscope, frequency tripling device, the 6th spectroscope, the 9th spectroscope and diaphragm are placed in the light path of described basic frequency laser source bright dipping successively; Second polarizer is positioned on the reflected light path of described first polarizer; Described first spectroscope is placed on the reflected light path of described second polarizer, and first spectroscopical reflected light path is incident on the 6th spectroscope; Described second spectroscope is placed on described 4th spectroscopical reflected light path, and the second electro-optical device is positioned on described second spectroscopical reflected light path; 3rd polarizer is positioned on the emitting light path of described second electro-optical device; First absorber is positioned on the reflected light path of described 3rd polarizer; Described 3rd spectroscope is positioned on the transmitted light path of described 3rd polarizer, and its reflected light path is incident to the 5th spectroscope; Described 6th spectroscope and the 7th spectroscope are positioned on first spectroscopical reflected light path successively; Described second absorber is positioned on described 7th spectroscopical transmitted light path; Described 3rd electro-optical device is positioned on described 7th spectroscopical reflected light path, and described 4th polarizer is positioned on the emitting light path of described 3rd electro-optical device, and described 3rd absorber is positioned on the reflected light path of described 4th polarizer; Described 8th spectroscope is positioned on the transmitted light path of the 4th polarizer, and its reflected light path is incident on the 9th spectroscope, and the 9th spectroscope is positioned on described first spectroscopical reflected light path.
2. multiwavelength laser as claimed in claim 1 switches output device, it is characterized in that, described multiple polarizer is used for polarization direction light high reverse--bias vertically, to polarization direction light height transmission in the horizontal direction.
3. multiwavelength laser as claimed in claim 1 switches output device, it is characterized in that, multiwavelength laser switches output device for exporting fundamental frequency light, two frequency doubled lights and frequency tripling light.
4. multiwavelength laser as claimed in claim 3 switches output device, it is characterized in that, when described multiwavelength laser switches output device for exporting fundamental frequency light, described first electro-optical device applies voltage, and the second electro-optical device and the 3rd electro-optical device do not apply voltage; Described multiwavelength laser switches output device for exporting two frequency doubled lights, and wherein the first electro-optical device does not apply voltage, and the second electro-optical device and the 3rd electro-optical device apply voltage; When described multiwavelength laser switches output device for exporting frequency tripling light, three electro-optical devices all do not apply voltage.
5. multiwavelength laser switches an output intent, and it comprises:
When step 1, output fundamental frequency light, apply voltage to the first electro-optical device; The fundamental frequency light that fundamental frequency light source produces is incident to the first electro-optical device, first electro-optical device rotates the polarization direction of described fundamental frequency light, through the postrotational fundamental frequency light in polarization direction by after the first polarizer and the second polarizer high reverse--bias, be incident to the first spectroscope, described fundamental frequency light, is exported from output window by the first spectroscope and the 6th dichroic mirror again after the 9th spectroscope transmission;
Step 2, when exporting two frequency doubled lights, the first electro-optical device does not apply voltage, and second, third electro-optical device applies voltage; The fundamental frequency light that fundamental frequency light source produces exports through the first electro-optical device, the fundamental frequency light exported enters two frequency doubling devices after the first polarizer transmission, and export two frequency doubled lights, two frequency doubled lights enter frequency tripling device through the 4th spectroscope and the 5th spectroscope, after the 4th spectroscope and the second dichroic mirror, enter the second electro-optical device through the remaining fundamental frequency light of two frequency doubling devices simultaneously, second electro-optical device rotates its polarization direction, and through polarization direction, postrotational fundamental frequency light is entered the first absorber absorb by the 3rd polarizer reflection; Two frequency doubled lights entering separately frequency tripling device do not produce frequency inverted and directly export, after the 6th spectroscope and the 7th dichroic mirror, again behind the 3rd electro-optical device rotatory polarization direction by the 4th polarizer height transmission, then by output window outgoing after the 8th spectroscope and the 9th dichroic mirror;
When step 3, output frequency tripling light, described first electro-optical device, the second electro-optical device and the 3rd electro-optical device all do not apply voltage, the fundamental frequency light that fundamental frequency light source produces exports through the first electro-optical device, the fundamental frequency light exported enters two frequency doubling devices after the first polarizer transmission, and export two frequency doubled lights, two frequency doubled lights enter frequency tripling device through the 4th spectroscope and the 5th spectroscope, after the 4th spectroscope and the second dichroic mirror, enter the second electro-optical device through the remaining fundamental frequency light of two frequency doubling devices simultaneously, frequency tripling device is entered through the 3rd spectroscope and the 5th dichroic mirror again after the 3rd polarizer transmission, frequency tripling device produces frequency tripling light based on the fundamental frequency light and two frequency doubled lights entering it, and export through output window after the 6th spectroscope and the 9th spectroscope transmission, remaining fundamental frequency light after frequency tripling device simultaneously, absorb via entering the second absorber after the 6th dichroic mirror, the 7th spectroscope transmission, remaining two frequency doubled lights, via after the 6th spectroscope and the 7th dichroic mirror, are entered the 3rd absorber by the 4th polarizer reflection and absorb after the 3rd electro-optical device.
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| CN109412006A (en) * | 2018-12-22 | 2019-03-01 | 苏州英谷激光有限公司 | It is able to achieve the outer Wavelength converter of chamber of output wavelength switching |
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