CN201345494Y - OPO laser - Google Patents
OPO laser Download PDFInfo
- Publication number
- CN201345494Y CN201345494Y CNU2009201367027U CN200920136702U CN201345494Y CN 201345494 Y CN201345494 Y CN 201345494Y CN U2009201367027 U CNU2009201367027 U CN U2009201367027U CN 200920136702 U CN200920136702 U CN 200920136702U CN 201345494 Y CN201345494 Y CN 201345494Y
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- light
- birefringece crystal
- separation module
- prism
- mirror
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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The utility model belongs to the field of lasers and especially belongs to the field of OPO lasers. The OPO laser adopts a birefringent crystal prism or prism to replace a polarization dichroic mirror of the prior art and to separate the signal light with the fundamental frequency light and the idling light in the cavity, the prism alignment is adopted, the dispersed angles are different for different wavelengths, and the rear cavity mirror adopts a flat mirror. The utility model does not adopt a membrane structure and only needs simple antireflection coating, so that the operating difficulty is reduced; and in addition, the OPO laser can be suitable for beam splitting for a majority of wavelengths.
Description
Technical field
The utility model relates to laser field, relates in particular to the OPO field of lasers.
Background technology
U.S. Pat 7447245 discloses a kind of OPO laser, and its structure is divided into flashlight and idle light two parts with fundamental frequency light F through frequency division crystal 30 based on the frequency division principle as shown in Figure 1.Wherein F represents fundamental frequency light, and its polarization direction is parallel paper direction (in an X-Y plane, shown in V), and the polarization direction of flashlight part is vertical paper direction (identical with Z-direction, shown in H), and idle light polarization direction is identical with F.Flashlight is to utilize polarization dichronic mirror 36 with separating of fundamental frequency light and idle light, is coated with a layer dielectric at the front surface of polarization dichronic mirror 36, and is high anti-to the fundamental frequency light and the idle light of V direction polarization, high saturating to the flashlight of H direction.This membrane structure required precision is higher, and operation easier is big, and difficulty is carried out beam splitting to the wave-length coverage of broad, and especially in the pulse pump optical cavity, the easier rete that causes damages.
The utility model content
At the problems referred to above, the utility model proposes a kind of new technical scheme, without membrane structure, only need simple anti-reflection film, be suitable for the OPO laser of most of wavelength.
The technical solution of the utility model is as follows:
OPO laser of the present utility model, comprise chamber mirror, frequency division crystal and light separation module and fundamental frequency light laser, each optics is arranged in order by light path, and is main, the beam splitter of described smooth separation module is to adopt the birefringece crystal element, plating anti-reflection film on it.
Further, first embodiment of described birefringece crystal element is the birefringece crystal right-angle prism, and the Effect of Back-Cavity Mirror of described smooth separation module adopts level crossing.
Further, second embodiment of described birefringece crystal element walks from crystal, and the Effect of Back-Cavity Mirror of described smooth separation module adopts level crossing.
Further, the 3rd embodiment of described birefringece crystal element is that Luo Sen birefringece crystal prism is right, and the Effect of Back-Cavity Mirror of described smooth separation module adopts level crossing.
Further, the 4th embodiment of described birefringece crystal element is made of the optical element of " sandwich " shape structure three birefringece crystals, wherein the optical axis of interlayer and bilevel optical axis are inconsistent, the optical axis of levels is vertical with incident light axis, and the Effect of Back-Cavity Mirror of described smooth separation module adopts concave mirror.
The utility model adopts as above technical scheme, adopt birefringece crystal prism or prism to flashlight in the chamber and fundamental frequency light and idle light are separated,, only need simple anti-reflection film without membrane structure, thereby operation easier is reduced, and go for the beam splitting of most of wavelength.
Description of drawings
Fig. 1 is the structural representation of prior art;
Fig. 2 is the structural representation of first embodiment of the present utility model;
Fig. 3 is the structural representation of second embodiment of the present utility model;
Fig. 4 is the structural representation of the 3rd embodiment of the present utility model;
Fig. 5 is the structural representation of the 4th embodiment of the present utility model.
Embodiment
Existing accompanying drawings and embodiment further specify the utility model.
The utility model is to utilize birefringece crystal prism or prism to idle light and flashlight in the separate chamber, without membrane structure, only needs simple anti-reflection film, is suitable for the OPO laser of most of wavelength.The utility model employing birefringece crystal prism or prism are right, and the flashlight in the frequency division chamber is separated with fundamental frequency light and idle light.Birefringece crystal can separate incident monochromatic o light and e light wherein according to the polarization direction.Fundamental frequency light is vertical with the birefringece crystal main cross section with idle light polarization direction, can regard o light as, and the law of refraction is followed in its propagation, and the flashlight polarization direction can be regarded the light as e as in the birefringece crystal main cross section, behind prism, its direction of propagation has a deflection angle, thereby flashlight is separated.
The structure of first embodiment of the present utility model as shown in Figure 2.Wherein, 201 is the fundamental frequency light laser, 202 is concavees lens, the high anti-idle light high transmittance film of its front surface plating fundamental frequency light, 203 is level crossing, 204 and 205 is the birefringece crystal prism, 205 can be used as the fundamental frequency light polarizer, its optical axis direction is shown in K, 206 is nonlinear optical crystal, frequency division crystal just, and fundamental frequency light (representing with heavy line among the figure) frequency division therein becomes flashlight (representing with fine line among the figure) and idle light (being represented by dotted lines among the figure), 207 is concave mirror, on be coated with high-reflecting film to fundamental frequency light, flashlight and idle light.Fundamental frequency light is identical with idle polarisation of light direction, vertical with paper (representing with V among the figure), the polarization direction of flashlight parallel with paper (representing with H among the figure).The thick dashed line square frame is a smooth separation module part of the present utility model.The light of frequency division crystal 2 06 is respectively the fundamental frequency light (representing with heavy line among the figure) of polarization direction vertical with paper (representing with V among the figure) and the flashlight (representing with fine line among the figure) of idle light (being represented by dotted lines among the figure) and polarization direction parallel with paper (representing with H among the figure), birefringece crystal prism 205 through the right angle, fundamental frequency light (representing with heavy line among the figure) is reflected on 45 ° of inclined-planes with idle light (being represented by dotted lines among the figure) and the output of vertical prism, again through the idle light (being represented by dotted lines among the figure) of concavees lens 202 selective transmissions of plated film, reflection fundamental frequency light (representing with heavy line among the figure) is to fundamental frequency light laser 201, and flashlight (representing with fine line among the figure) reflects in the birefringece crystal prism 205 at right angle and slightly departs from outgoing, again by birefringece crystal prism 204 bending light paths to level crossing 203 outputs.
The structure of second embodiment of the present utility model as shown in Figure 3.Its light path principle and first embodiment shown in Figure 2 are similar, wherein, 303 is right-angle prism, rotating the direction in chamber regulates for convenient, 204 is level crossing, and 305 for walking the crystal from (work-off), fundamental frequency light therein and the normal outgoing of idle light positive, the emergent light of flashlight has a deviation angle, thereby makes them separately.
The structure of the 3rd embodiment of the present utility model as shown in Figure 4.Its light path principle and second embodiment shown in Figure 3 are similar, and wherein, 404 and 405 is that a pair of Luo Sen (Rochon) birefringece crystal prism is right, separately fundamental frequency light and the o light of idle light and the e light of flashlight.
The structure of the 4th embodiment of the present utility model as shown in Figure 5.Wherein, 504 is optical elements that three birefringece crystals constitute " sandwich " shape structure, its optical axis direction in the figure sign, wherein the optical axis of interlayer and bilevel optical axis are inconsistent, the optical axis of levels is vertical with incident light axis, total reflection takes place in flashlight at the intermediate course interface, thereby separates with fundamental frequency light and idle light, and the Effect of Back-Cavity Mirror of this light separation module adopts concave mirror.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (5)
1. an OPO laser comprises chamber mirror, frequency division crystal and light separation module and fundamental frequency light laser, and each optics is arranged in order by light path, it is characterized in that: the beam splitter of described smooth separation module is to adopt the birefringece crystal element, plating anti-reflection film on it.
2. OPO laser according to claim 1 is characterized in that: described birefringece crystal element is the birefringece crystal right-angle prism, and the Effect of Back-Cavity Mirror of described smooth separation module adopts level crossing.
3. OPO laser according to claim 1 is characterized in that: described birefringece crystal element is to walk from crystal, and the Effect of Back-Cavity Mirror of described smooth separation module adopts level crossing.
4. OPO laser according to claim 1 is characterized in that: described birefringece crystal element is that Luo Sen birefringece crystal prism is right, and the Effect of Back-Cavity Mirror of described smooth separation module adopts level crossing.
5. OPO laser according to claim 1, it is characterized in that: described birefringece crystal element is the optical element of the sandwich-like structure of three birefringece crystals formations, wherein the optical axis of interlayer and bilevel optical axis are inconsistent, the optical axis of levels is vertical with incident light axis, and the back cavity of described smooth separation module adopts concave mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201367027U CN201345494Y (en) | 2009-02-10 | 2009-02-10 | OPO laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201367027U CN201345494Y (en) | 2009-02-10 | 2009-02-10 | OPO laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201345494Y true CN201345494Y (en) | 2009-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201367027U Expired - Fee Related CN201345494Y (en) | 2009-02-10 | 2009-02-10 | OPO laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201345494Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556769A (en) * | 2013-09-18 | 2016-05-04 | 富士胶片株式会社 | Solid-state laser device and photoacoustic measurement device |
-
2009
- 2009-02-10 CN CNU2009201367027U patent/CN201345494Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105556769A (en) * | 2013-09-18 | 2016-05-04 | 富士胶片株式会社 | Solid-state laser device and photoacoustic measurement device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091111 Termination date: 20130210 |