CN201910568U - Green laser - Google Patents
Green laser Download PDFInfo
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- CN201910568U CN201910568U CN2010206895864U CN201020689586U CN201910568U CN 201910568 U CN201910568 U CN 201910568U CN 2010206895864 U CN2010206895864 U CN 2010206895864U CN 201020689586 U CN201020689586 U CN 201020689586U CN 201910568 U CN201910568 U CN 201910568U
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Abstract
The utility model provides a green laser which comprises an LD (laser diode) pumping light source for emitting pumping light, a laser crystal for converting the pumping light into fundamental frequency light, and a frequency doubling crystal for converting the fundamental frequency light into green frequency double light, wherein the light emiiting surface of the laser crystal is coated with a pumping light partial reflecting membrane which can reflect the pumping light that is not converted by the laser crystal back into the laser crystal. In the green laser, by coating the pumping light partial reflecting membrane on the light emitting surface of the laser crystal in the laser, without changing the absorbing efficiency of the laser crystal on the pumping light, the doping concentration of the laser crystal can be reduced, so that the problems of non-uniform heat distribution and obvious heat effect due to the high doping concentration of the laser crystal can be avoided.
Description
Technical field
The utility model relates to optical field, particularly a kind of green (light) laser.
Background technology
Higher energy conversion efficiency and volume are little owing to having for the solid state laser of LD pumping, compact conformation, stable, the life-span long and advantage such as full curing has broad application prospects.In concrete the application, the color of laser that laser sends there is multiple demand, the green (light) laser that sends green laser is exactly a kind of common laser.At present, the solid green light laser of LD pumping mainly comprises LD pump light source, laser crystal and frequency-doubling crystal.Wherein, laser crystal is converted to fundamental frequency light with pump light after receiving the pump light of LD pump light source emission, and this fundamental frequency light becomes frequency doubled light after by described frequency-doubling crystal, and the frequency doubled light of wavelength in the 500nm-570nm scope belongs to green glow.
In the LD end-face pump solid laser, usually the method by plated film makes an end face of laser crystal as the front cavity mirror of resonant cavity in the laser.Fig. 1 is in a kind of mode of the both ends of the surface of laser crystal plating laser film, promptly at high saturating, fundamental frequency light of the incidence surface plating pump light of laser crystal and the high anti-film of frequency doubled light, at the exiting surface plating fundamental frequency light high transmittance film and the frequency doubled light high-reflecting film of laser crystal in the prior art.After finishing coating operation by the way, can be with the incidence surface of resulting laser crystal front cavity mirror as resonant cavity.
But above-mentioned existing film plating process has following shortcoming:
1) unabsorbed pump light can be from the exiting surface outgoing of laser crystal in the laser crystal, reduced the absorption efficiency of laser crystal to pump light, though can improve the absorption efficiency of laser crystal by the method that improves laser crystal doping content or lengthening laser crystal optical direction length to pump light, but the method that improves the laser crystal doping content just can make on the laser crystal end face almost all absorptive pumping light, cause the end face of heat localization in laser crystal, bring thermal lens and end face deformation problems thus, just said heat distribution is inhomogeneous, problems such as thermal effect is obvious; And the method for lengthening laser crystal optical direction length can make absorbing phenomenon increase the weight of again, and in addition, considers factors such as pump light focusing system, best pattern match, and the length of laser crystal also can not increase a lot;
2) a frequency doubled light part that produces by frequency-doubling crystal is from the exiting surface outgoing of frequency-doubling crystal, some frequency doubled light incides in the laser crystal by the laser crystal exiting surface that is coated with the frequency doubled light high transmittance film, after laser crystal absorbs frequency doubled light, increase the thermal effect of laser crystal, reduced the stability of laser crystal.
The utility model content
The purpose of this utility model is to overcome film plating process in the existing green (light) laser to make the defective that laser crystal is lower to the absorption efficiency of pump light, thereby a kind of green (light) laser with higher absorption efficient is provided.
To achieve these goals, the utility model provides a kind of green (light) laser, comprise the LD pump light source that is used to launch pump light, be used for frequency-doubling crystal that pump light is converted to the laser crystal of fundamental frequency light and is used for fundamental frequency light is converted to green frequency doubled light, then be coated with pump light partial reflection film on the exiting surface of described laser crystal; Wherein,
Described pump light partial reflection film is with in the described laser crystal of the still non-switched pump light reflected back of described laser crystal.
In the technique scheme, be coated with pump light high transmittance film, fundamental frequency light high-reflecting film and frequency doubled light high-reflecting film on the incidence surface of described laser crystal, also be coated with fundamental frequency light high transmittance film and frequency doubled light high transmittance film on the exiting surface of described laser crystal.
In the technique scheme, be coated with pump light high transmittance film and fundamental frequency light high-reflecting film on the incidence surface of described laser crystal, also be coated with fundamental frequency light high transmittance film and frequency doubled light high-reflecting film on the exiting surface of described laser crystal.
In the technique scheme, also comprise condenser lens, described condenser lens is used for being transmitted into described laser crystal after the pump light focusing with described LD pump light source emission between described LD pump light source and laser crystal.
In the technique scheme, the luminous power after the reflectivity of described pump light partial reflection film will make the pump light that reflected transmit via the exiting surface of described laser crystal is less than the damage threshold of described LD pump light source.
In the technique scheme, the pumping light wavelength that described LD pump light source is sent is 808nm, and described pump light partial reflection film is the partial reflection film of the light of 808nm for being fit to reflection wavelength.
The utility model also provides a kind of green (light) laser, comprise the LD pump light source that is used to launch pump light, be used for frequency-doubling crystal that pump light is converted to the laser crystal of fundamental frequency light and is used for fundamental frequency light is converted to green frequency doubled light, be coated with the frequency doubled light high-reflecting film on the exiting surface of described laser crystal; Wherein,
Described frequency doubled light high-reflecting film is with described frequency-doubling crystal generated and incide the described frequency-doubling crystal of frequency doubled light reflected back on the described laser crystal.
In the technique scheme, be coated with pump light high transmittance film and fundamental frequency light high-reflecting film on the incidence surface of described laser crystal, also be coated with fundamental frequency light high transmittance film on the exiting surface of described laser crystal.
In the technique scheme, be coated with pump light high transmittance film and fundamental frequency light high-reflecting film on the incidence surface of described laser crystal, also be coated with fundamental frequency light high transmittance film and pump light partial reflection film on the exiting surface of described laser crystal; Described pump light partial reflection film is with in the described laser crystal of the still non-switched pump light reflected back of described laser crystal.
In the technique scheme, also comprise condenser lens, described condenser lens is used for being transmitted into described laser crystal after the pump light focusing with described LD pump light source emission between described LD pump light source and laser crystal.
In the technique scheme, the luminous power after the reflectivity of described pump light partial reflection film will make the pump light that reflected transmit via the exiting surface of described laser crystal is less than the damage threshold of described LD pump light source.
In the technique scheme, the pumping light wavelength that described LD pump light source is sent is 808nm, and described pump light partial reflection film is the partial reflection film of the light of 808nm for being fit to reflection wavelength.
In the technique scheme, the pumping light wavelength that described LD pump light source is sent is 808nm, described laser crystal is that the pump light of 808nm converts the fundamental frequency light that wavelength is 1064nm to described wavelength, and described frequency-doubling crystal is that the fundamental frequency light of 1064nm is converted to the frequency doubled light that wavelength is 532nm with described wavelength; Described frequency doubled light high-reflecting film is the high-reflecting film of the light of 532nm for being fit to reflection wavelength.
Advantage of the present utility model is:
1, the utility model is by the exiting surface plating pump light partial reflection film of the laser crystal in laser, can keep under the described laser crystal prerequisite constant pump light absorption efficiency, reduce the doping content of laser crystal, inhomogeneous, the tangible problem of thermal effect of heat distribution of having avoided laser crystal to cause because of higher doping content.
2, the utility model makes frequency doubled light can not enter in the described laser crystal, thereby has improved the stability of laser crystal by the exiting surface plating frequency doubled light high-reflecting film of the laser crystal in laser.
Description of drawings
Fig. 1 is the schematic diagram of two films that end face plated of laser crystal in the prior art;
Fig. 2 is a green (light) laser of the present utility model structural representation in one embodiment;
Fig. 3 is the schematic diagram of two films that end face plated of the laser crystal in the green (light) laser in one embodiment;
Fig. 4 is the schematic diagram of two films that end face plated of the laser crystal in the green (light) laser in another embodiment;
Fig. 5 is the schematic diagram of two films that end face plated of the laser crystal in the green (light) laser In yet another embodiment;
Fig. 6 is a green (light) laser of the present utility model structural representation in another embodiment.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing the utility model is further specified, but its qualification of not opposing.
In Fig. 2, provided green (light) laser of the present utility model structural representation in one embodiment.As shown in Figure 2, this green (light) laser comprises: LD pump light source 101, laser crystal 102 and frequency-doubling crystal 103.Structure, function and realization to the above-mentioned parts in this green (light) laser is illustrated respectively below.
Wherein, LD pump light source 101 is used to launch pump light; Described pumping light wavelength can have multiple possibility, and for example, wavelength is the pump light of 808nm, or wavelength is the pump light of 880nm.In the present embodiment, the pumping light wavelength of described LD pump light source 101 emissions is 808nm.
Laser crystal 102 is used for the pump light of LD pump light source 101 emissions is converted to fundamental frequency light.Fig. 3 is the schematic diagram of two films that end face plated of laser crystal described in the present embodiment, as shown in Figure 3, on the incidence surface of laser crystal 102, be coated with the pump light high transmittance film, fundamental frequency light high-reflecting film and frequency doubled light high-reflecting film, on the exiting surface of laser crystal 102, then be coated with pump light partial reflection film, fundamental frequency light high transmittance film and frequency doubled light high transmittance film.
As what mentioned in the background technology, prior art improves the absorptivity of described laser crystal to pump light by improving the laser crystal doping content, but higher-doped concentration can make the end face of laser crystal absorb most pump light, cause the end face of heat localization, bring that heat distribution is inhomogeneous, the tangible problem of thermal effect in laser crystal; Make easily that also the end face of assembling heat produces deformation and heat distribution is inhomogeneous.Therefore, compare with prior art shown in Figure 1, in the present embodiment, on the exiting surface of described laser crystal 102, also be coated with pump light partial reflection film, this makes the pump light that is not absorbed by laser crystal can be reflected back toward described laser crystal 102 inside when arriving on the exiting surface that is coated with described pump light partial reflection film, laser crystal 102 is absorptive pumping light once more, raising is to the absorptivity of pump light, needn't be again for the absorptivity that improves pump light painstakingly improves doping content, so laser crystal 102 can be issued in lower doping content with prior art in the equal pump light absorptivity of laser crystal of higher-doped concentration.Because the doping content of laser crystal 102 is lower, therefore also just no longer have inhomogeneous, the tangible problem of thermal effect of heat distribution that causes because of higher-doped concentration.In addition, light path according to green (light) laser, the unabsorbed pump light of laser crystal can be incided in the frequency-doubling crystal 103, cause the thermal effect of frequency-doubling crystal 103, therefore, also help improving the stability of described frequency-doubling crystal 103 by coating pump light partial reflection film on the exiting surface of laser crystal 102.
The selection of described pump light partial reflection film is relevant with the concrete wavelength of described pump light.In the present embodiment, the pumping light wavelength that described LD pump light source 101 is sent is 808nm, described laser crystal 102 is that the pump light of 808nm converts the fundamental frequency light that wavelength is 1064nm to described wavelength, and described frequency-doubling crystal 103 is that the fundamental frequency light of 1064nm is converted to the frequency doubled light that wavelength is 532nm with described wavelength.Therefore the pump light partial reflection film on the exiting surface of laser crystal 102 is the partial reflection film of the light of 808nm for being fit to reflection wavelength.In addition, in the present embodiment, pump light high transmittance film on the incidence surface of described laser crystal 102 is the high transmittance film of the light of 808nm for being fit to see through wavelength, described fundamental frequency light high-reflecting film is the high-reflecting film of the light of 1064nm for being fit to reflection wavelength, and described fundamental frequency light high transmittance film is the high transmittance film of the light of 1064nm for being fit to see through wavelength.
Need to prove, the pump light that goes out reflected back laser crystal inside from the pump light partial reflection film of laser crystal can not all be absorbed by laser crystal again, also can be transmitted to LD pump light source 101 by some incidence surface from laser crystal, and LD pump light source 101 has damage threshold, when the light that sends when LD pump light source 101 is reflected to self once more, if catoptrical luminous power is greater than this damage threshold, will damage LD pump light source 101, therefore, when determining the reflectivity of pump light partial reflection film, can determine according to following principle: should guarantee that described pump light reflectance coating can improve the absorptivity of laser crystal to pump light, the luminous power after the pump light of guaranteeing reflected back again transmits from the incidence surface of laser crystal 102 is less than the damage threshold of LD pump light source 101.
Frequency-doubling crystal 103 is used for the fundamental frequency light of laser crystal 102 conversions is carried out frequency multiplication, produces frequency doubled light, is the interior frequency doubled light of 500nm-570nm scope, i.e. green glow thereby generate wavelength.
In another embodiment of the present utility model, as shown in Figure 4, be coated with pump light high transmittance film and fundamental frequency light high-reflecting film on the incidence surface of the laser crystal 102 of green (light) laser, be coated with fundamental frequency light high transmittance film and frequency doubled light high-reflecting film on the exiting surface of laser crystal 102, all the other structures of green (light) laser are identical with last embodiment.
In the prior art, on the incidence surface of laser crystal, be coated with the frequency doubled light high-reflecting film, and on exiting surface, be coated with the frequency doubled light high transmittance film, like this, a part of frequency doubled light in the frequency doubled light that obtains by frequency-doubling crystal can incide in the laser crystal, after laser crystal has absorbed these frequency doubled lights, can increase the thermal effect of laser crystal, thereby reduce the stability of laser crystal.And in the present embodiment frequency doubled light high-reflecting film has been plated in the exiting surface of laser crystal 102 and saved original frequency doubled light high transmittance film, can make like this when inciding the exiting surface of laser crystal 102 through a part of frequency doubled light in the frequency doubled light that obtains after frequency-doubling crystal 103 frequencys multiplication, be coated with 103 li of the exiting surface reflected back frequency-doubling crystals of frequency doubled light high-reflecting film, and make frequency doubled light can not enter in the described laser crystal 102, bring influence just can for laser crystal 102 yet, thereby improve the stability of laser crystal 102.
The selection of described frequency doubled light high-reflecting film is relevant with the concrete wavelength of described frequency doubled light.In the present embodiment, the pumping light wavelength that described LD pump light source 101 is sent is 808nm, described laser crystal 102 is that the pump light of 808nm converts the fundamental frequency light that wavelength is 1064nm to described wavelength, and described frequency-doubling crystal 103 is that the fundamental frequency light of 1064nm is converted to the frequency doubled light that wavelength is 532nm with described wavelength.Therefore, the frequency doubled light high-reflecting film is the high-reflecting film of the light of 532nm for being fit to reflection wavelength.
As a kind of preferred implementation, in another embodiment of the present utility model, as shown in Figure 5, be coated with pump light partial reflection film, fundamental frequency light high transmittance film and frequency doubled light high-reflecting film on the exiting surface of described laser crystal 102 simultaneously, on its incidence surface, be coated with pump light high transmittance film and fundamental frequency light high-reflecting film simultaneously.This makes the green (light) laser among this embodiment neither need to improve the absorptivity of described laser crystal to pump light by improving the laser crystal doping content, the pump light that can avoid reflected back again can damage LD pump light source 101 after going out from the incidence surface transmission of described laser crystal, and a part of frequency doubled light in the frequency doubled light of having avoided obtaining through frequency-doubling crystal incides in the laser crystal, improved the stability of laser crystal.
In order to improve the power density that incides pump light in the laser crystal, in another embodiment, as shown in Figure 6, on the basis of aforementioned a plurality of embodiment, green (light) laser of the present utility model can also comprise condenser lens 104, this condenser lens 104 is used for being transmitted into laser crystal 102 after the pump light focusing with 101 emissions of LD pump light source between LD pump light source 101 and laser crystal 102.
It should be noted last that above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (13)
1. green (light) laser, comprise the LD pump light source (101) that is used to launch pump light, be used for frequency-doubling crystal (103) that pump light is converted to the laser crystal (102) of fundamental frequency light and is used for fundamental frequency light is converted to green frequency doubled light, it is characterized in that, then be coated with pump light partial reflection film on the exiting surface of described laser crystal (102); Wherein,
Described pump light partial reflection film is with in described laser crystal (102) the described laser crystal of still non-switched pump light reflected back (102).
2. green (light) laser according to claim 1, it is characterized in that, be coated with pump light high transmittance film, fundamental frequency light high-reflecting film and frequency doubled light high-reflecting film on the incidence surface of described laser crystal (102), also be coated with fundamental frequency light high transmittance film and frequency doubled light high transmittance film on the exiting surface of described laser crystal (102).
3. green (light) laser according to claim 1, it is characterized in that, be coated with pump light high transmittance film and fundamental frequency light high-reflecting film on the incidence surface of described laser crystal (102), also be coated with fundamental frequency light high transmittance film and frequency doubled light high-reflecting film on the exiting surface of described laser crystal (102).
4. green (light) laser according to claim 1, it is characterized in that, also comprise condenser lens (104), described condenser lens is positioned between described LD pump light source (101) and the laser crystal (102), is used for being transmitted into described laser crystal (102) after the pump light focusing with described LD pump light source (101) emission.
5. green (light) laser according to claim 1 and 2, it is characterized in that the luminous power after the reflectivity of described pump light partial reflection film will make the pump light that reflected transmit via the exiting surface of described laser crystal (102) is less than the damage threshold of described LD pump light source (101).
6. according to claim 1 or 2 or 3 described green (light) lasers, it is characterized in that the pumping light wavelength that described LD pump light source (101) is sent is 808nm, described pump light partial reflection film is the partial reflection film of the light of 808nm for being fit to reflection wavelength.
7. green (light) laser, comprise the LD pump light source (101) that is used to launch pump light, be used for frequency-doubling crystal (103) that pump light is converted to the laser crystal (102) of fundamental frequency light and is used for fundamental frequency light is converted to green frequency doubled light, it is characterized in that, be coated with the frequency doubled light high-reflecting film on the exiting surface of described laser crystal (102); Wherein,
That described frequency doubled light high-reflecting film is generated described frequency-doubling crystal (103) and incide the described frequency-doubling crystal of frequency doubled light reflected back (103) on the described laser crystal (102).
8. green (light) laser according to claim 7 is characterized in that, is coated with pump light high transmittance film and fundamental frequency light high-reflecting film on the incidence surface of described laser crystal (102), also is coated with fundamental frequency light high transmittance film on the exiting surface of described laser crystal (102).
9. green (light) laser according to claim 7, it is characterized in that, be coated with pump light high transmittance film and fundamental frequency light high-reflecting film on the incidence surface of described laser crystal (102), also be coated with fundamental frequency light high transmittance film and pump light partial reflection film on the exiting surface of described laser crystal (102); Described pump light partial reflection film is with in described laser crystal (102) the described laser crystal of still non-switched pump light reflected back (102).
10. according to claim 7 or 8 or 9 described green (light) lasers, it is characterized in that, also comprise condenser lens (104), described condenser lens is positioned between described LD pump light source (101) and the laser crystal (102), is used for being transmitted into described laser crystal (102) after the pump light focusing with described LD pump light source (101) emission.
11. green (light) laser according to claim 9, it is characterized in that the luminous power after the reflectivity of described pump light partial reflection film will make the pump light that reflected transmit via the exiting surface of described laser crystal (102) is less than the damage threshold of described LD pump light source (101).
12. green (light) laser according to claim 9 is characterized in that, the pumping light wavelength that described LD pump light source (101) is sent is 808nm, and described pump light partial reflection film is the partial reflection film of the light of 808nm for being fit to reflection wavelength.
13. according to claim 7 or 8 or 9 described green (light) lasers, it is characterized in that, the pumping light wavelength that described LD pump light source (101) is sent is 808nm, described laser crystal (102) is that the pump light of 808nm converts the fundamental frequency light that wavelength is 1064nm to described wavelength, and described frequency-doubling crystal (103) is that the fundamental frequency light of 1064nm is converted to the frequency doubled light that wavelength is 532nm with described wavelength; Described frequency doubled light high-reflecting film is the high-reflecting film of the light of 532nm for being fit to reflection wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206895864U CN201910568U (en) | 2010-12-30 | 2010-12-30 | Green laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206895864U CN201910568U (en) | 2010-12-30 | 2010-12-30 | Green laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201910568U true CN201910568U (en) | 2011-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010206895864U Expired - Fee Related CN201910568U (en) | 2010-12-30 | 2010-12-30 | Green laser |
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| CN (1) | CN201910568U (en) |
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2010
- 2010-12-30 CN CN2010206895864U patent/CN201910568U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING GOODWILL LAW FIRM Free format text: FORMER OWNER: OPTOELECTRONICS TECHNOLOGY CO., LTD. OF BEIJING ZHONGSHIDA + CHINESE ACADEMY OF Effective date: 20140715 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100094 HAIDIAN, BEIJING TO: 100010 DONGCHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140715 Address after: 100010, D building, Fuhua building, No. 8 North Main Street, Beijing, Dongcheng District, Chaoyangmen, 14A Patentee after: Beijing Sega law firm Address before: 100094, Haidian District, Yongfeng hi tech industrial base, 3 North Wing Road, modern enterprise accelerator B block, 5 floor, Beijing Patentee before: Optoelectronics Technology Co., Ltd. Of Beijing Zhongshida & Chinese Academy Of |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110727 Termination date: 20141230 |
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| EXPY | Termination of patent right or utility model |