CN201910569U - Blue laser - Google Patents
Blue laser Download PDFInfo
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- CN201910569U CN201910569U CN2010206898951U CN201020689895U CN201910569U CN 201910569 U CN201910569 U CN 201910569U CN 2010206898951 U CN2010206898951 U CN 2010206898951U CN 201020689895 U CN201020689895 U CN 201020689895U CN 201910569 U CN201910569 U CN 201910569U
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Abstract
The utility model provides a blue laser, which comprises an LD (laser diode) pump light source for transmitting pump light, a laser crystal for converting the pump light into base frequency light, and a frequency doubling crystal for converting the base frequency light into blue frequency doubled light. The blue laser is characterized in that a pump light partial reflecting film is coated on an emergent face of the laser crystal, and pump light not yet converted by the laser crystal can be reflected back to the laser crystal. The pump light partial reflecting film is coated on the emergent face of the laser crystal of the blue laser, the efficiency of the laser crystal absorbing the pump light is increased while doping concentration of the laser crystal is lower, the frequency doubled light highly-reflecting film is coated on the emergent face of the laser crystal in the blue laser so hat frequency doubled light cannot enter the laser crystal and stability of the laser crystal is enhanced.
Description
Technical field
The utility model relates to optical field, particularly a kind of blue 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 blue laser that sends blue laser is exactly a kind of common laser.At present, the solid blue 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 420nm～470nm scope belongs to blue light.
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 reduce the absorption efficiency of laser crystal to pump light from the exiting surface outgoing of laser crystal in the laser crystal.Improve laser crystal can adopt raising laser crystal doping content or lengthening laser crystal optical direction length to the absorptivity of pump light method in the prior art.But for blue laser, laser crystal with higher-doped concentration not only can absorptive pumping light, also can absorb the fundamental frequency light that is transformed by pump light, promptly absorbing phenomenon is serious again, and the laser crystal that therefore is arranged in blue laser must remain under the lower doping content; And the method for lengthening laser crystal optical direction length also 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 blue 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 blue 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 blue 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 blue 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 blue 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 912nm to described wavelength, and described frequency-doubling crystal is that the fundamental frequency light of 912nm is converted to the frequency doubled light that wavelength is 456nm with described wavelength; Described frequency doubled light high-reflecting film is the high-reflecting film of the light of 456nm for being fit to reflection wavelength.
Advantage of the present utility model is:
1, the exiting surface plating pump light partial reflection film of the laser crystal of the utility model by in laser can improve the absorption efficiency of laser crystal to pump light keeping described laser crystal to have under the prerequisite than low doping concentration.
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 of the prior art;
Fig. 2 is a blue 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 blue laser in one embodiment;
Fig. 4 is the schematic diagram of two films that end face plated of the laser crystal in the blue laser in another embodiment;
Fig. 5 is the schematic diagram of two films that end face plated of the laser crystal in the blue laser In yet another embodiment;
Fig. 6 is a blue 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 blue laser of the present utility model structural representation in one embodiment.As shown in Figure 2, this blue 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 blue 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, laser crystal in blue laser can't improve the absorptivity of described laser crystal to pump light by improving doping content, 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 102 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 makes laser crystal 102 can improve the pump light absorptivity under lower doping content to the absorptivity of pump light.In addition, light path according to blue 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, 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 912nm to described wavelength, and described frequency-doubling crystal 103 is that the fundamental frequency light of 912nm is converted to the frequency doubled light that wavelength is 456nm 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 912nm for being fit to reflection wavelength, and described fundamental frequency light high transmittance film is the high transmittance film of the light of 912nm 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 420nm～470nm scope, i.e. blue light 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 blue 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 blue 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.
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 912nm to described wavelength, and described frequency-doubling crystal 103 is that the fundamental frequency light of 912nm is converted to the frequency doubled light that wavelength is 456nm with described wavelength.Therefore the frequency doubled light high-reflecting film is the high-reflecting film of the light of 456nm 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 blue 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, on the basis of aforementioned a plurality of embodiment, blue 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. blue 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 blue 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. blue 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. blue 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. blue 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. blue 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 blue 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. blue 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 blue 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. blue 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. blue 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 blue 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. blue 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. blue 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 blue 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 912nm to described wavelength, and described frequency-doubling crystal (103) is that the fundamental frequency light of 912nm is converted to the frequency doubled light that wavelength is 456nm with described wavelength; Described frequency doubled light high-reflecting film is the high-reflecting film of the light of 456nm for being fit to reflection wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206898951U CN201910569U (en) | 2010-12-30 | 2010-12-30 | Blue laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206898951U CN201910569U (en) | 2010-12-30 | 2010-12-30 | Blue laser |
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| CN201910569U true CN201910569U (en) | 2011-07-27 |
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| CN2010206898951U Expired - Fee Related CN201910569U (en) | 2010-12-30 | 2010-12-30 | Blue laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581434A (en) * | 2019-09-20 | 2019-12-17 | 中国空间技术研究院 | Method for generating 2-micron-waveband single-wavelength stable laser output and laser device |
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- 2010-12-30 CN CN2010206898951U patent/CN201910569U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581434A (en) * | 2019-09-20 | 2019-12-17 | 中国空间技术研究院 | Method for generating 2-micron-waveband single-wavelength stable laser output and laser device |
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| 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: 20140716 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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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: 20140716 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 |