CN209805087U - Double 45-degree refraction and reflection solid laser resonant cavity - Google Patents
Double 45-degree refraction and reflection solid laser resonant cavity Download PDFInfo
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- CN209805087U CN209805087U CN201920186519.1U CN201920186519U CN209805087U CN 209805087 U CN209805087 U CN 209805087U CN 201920186519 U CN201920186519 U CN 201920186519U CN 209805087 U CN209805087 U CN 209805087U
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Abstract
The utility model provides a double 45-degree reflecting solid laser resonant cavity, which comprises a total reflector, a working substance, a double 45-degree reflector and an output mirror; a total reflector and a double 45-degree reflector are coaxially arranged at two ends of the working substance respectively; the laser generated by the working substance is incident to the total reflector, and the laser reflected by the total reflector is incident to the double 45-degree reflectors through the working substance; the double 45-degree reflecting mirrors refract the incident laser by 180 degrees to obtain reflected laser which is parallel to the incident laser and has the opposite direction; on the transmission light path of the reflected laser light of the double 45 ° mirrors, an output mirror is arranged. Has the advantages that: the utility model discloses under the condition that reduces the resonant cavity chamber length, keep the output mirror to have longer regulation distance with the work material, through the distance of adjusting work material and output mirror to improve the laser output performance, including improving laser output energy and improving the light beam quality.
Description
Technical Field
The utility model belongs to the technical field of laser, concretely relates to two 45 book reflection of solid laser resonator.
background
The solid laser resonant cavity is an important component of a laser, and the design of the structure of the solid laser resonant cavity is the key to realize the laser output with high beam quality, high efficiency and high stability.
at present, the solid laser resonant cavity is mostly a straight-line cavity, namely: the solid laser resonant cavity comprises two reflectors which can be plane mirrors or spherical mirrors and are arranged at two ends of a laser working substance. The distance between the two mirrors is the cavity length. One of the mirrors is a total reflection mirror, and the other mirror has a slightly low reflectivity, so that the laser light is output from the mirror, and the mirror is called an output mirror. The working principle is as follows: the laser working substance is excited to generate light, the light is repeatedly transmitted in a resonant cavity formed by the total reflection mirror and the output mirror to form stable and continuous oscillation, the light with certain frequency and consistent direction is firstly amplified and is output from the output mirror. The distance between the total reflection mirror and the output mirror is the cavity length L, and the length of the light in one cycle of the resonant cavity is 2L.
the above-described linear chamber has the following problems: (1) since the length of a cycle of light traveling in the resonant cavity is related to the laser output performance, while for a linear cavity, the length of a cycle of light traveling in the resonant cavity is twice the cavity length, it is generally necessary to design the cavity length of the resonant cavity to a large value in order to obtain a high laser output performance, thereby increasing the cavity length of the resonant cavity. (2) The distance between the output mirror and the laser working substance affects the laser output performance. In the limited volume, the distance between the output mirror of the linear cavity and the laser working substance cannot be adjusted, so that the requirement for improving the laser output performance cannot be met.
SUMMERY OF THE UTILITY MODEL
The defect to prior art existence, the utility model provides a two 45 reflect solid laser resonator can effectively solve above-mentioned problem.
the utility model adopts the technical scheme as follows:
The utility model provides a double 45-degree reflecting solid laser resonant cavity, which comprises a total reflector (1), a working substance (2), a double 45-degree reflector (A) and an output mirror (5);
The two ends of the working substance (2) are respectively and coaxially provided with the total reflector (1) and the double 45-degree reflectors (A); the laser generated by the working substance (2) is incident to the total reflection mirror (1), and the laser reflected by the total reflection mirror (1) is incident to the double 45-degree reflection mirror (A) through the working substance (2); the double 45-degree reflecting mirror (A) refracts the incident laser by 180 degrees to obtain reflected laser parallel to the incident laser and in the opposite direction; and the output mirror (5) is arranged on the transmission light path of the reflected laser light of the double 45-degree reflecting mirror (A).
Preferably, the double 45-degree reflecting mirror (A) comprises a first 45-degree total reflecting mirror (3) and a second 45-degree total reflecting mirror (4);
the included angle between the first 45-degree total reflection mirror (3) and the main optical axis of the working substance (2) is 45 degrees; the reflection light path of the first 45-degree total reflection mirror (3) is vertical to the incident light path of the first 45-degree total reflection mirror; the second 45-degree total reflector (4) is arranged on the reflection light path of the first 45-degree total reflector (3), and the included angle between the second 45-degree total reflector (4) and the reflection light path of the first 45-degree total reflector (3) is 45 degrees; the reflection light path of the second 45-degree total reflecting mirror (4) is perpendicular to the incident light path of the second 45-degree total reflecting mirror, so that the incident light path of the first 45-degree total reflecting mirror (3) is parallel to the reflection light path of the second 45-degree total reflecting mirror (4) and the direction of the incident light path is opposite.
Preferably, the double 45 ° mirror (a) is a prism for 180-degree folding of the light path.
Preferably, the liquid crystal display further comprises a polaroid (6); the polaroid (6) is coaxially arranged on an optical path between the working substance (2) and the total reflection mirror (1).
preferably, the device also comprises a Q-switched crystal (7); the Q-switching crystal (7) is coaxially arranged between the polaroid (6) and the total reflection mirror (1); the Q-switching crystal (7) and the polarizing plate (6) form a light Q-switching switch.
The utility model provides a two 45 reflect solid laser resonator have following advantage:
The utility model discloses under the condition that reduces the resonant cavity chamber length, keep the output mirror to have longer regulation distance with the work material, through the distance of adjusting work material and output mirror to improve the laser output performance, including improving laser output energy and improving the light beam quality.
Drawings
fig. 1 is a schematic structural diagram of a dual 45 ° catadioptric solid-state laser resonator according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a double 45 ° catadioptric solid-state laser resonator according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a double 45 ° catadioptric solid-state laser resonator according to a third embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a double 45 ° catadioptric solid-state laser resonator according to a third embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a dual 45 ° catadioptric solid-state laser resonator according to a fourth embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a two 45 book anti-solid laser resonator designs through the structure to the solid laser resonator, realizes following advantage: (1) under the condition that the cavity length of the resonant cavity is fixed, the method prolongs the length of light in one cycle of the operation of the resonant cavity, so that the laser output performance can be improved under the condition that the cavity length of the resonant cavity is not changed; (2) in the limited volume of the resonant cavity, the distance adjusting range of the output mirror and the working substance is increased, and the laser output performance can be improved by adjusting the distance between the output mirror and the working substance.
The utility model provides a two 45 reflect solid laser resonator mainly includes holophote 1, working substance 2, two 45 speculum A and output mirror 5.
referring to fig. 1, the specific arrangement of the double 45 ° catadioptric solid-state laser resonator is as follows: a total reflector 1 and a double 45-degree reflector A are coaxially arranged at two ends of the working substance 2 respectively; the laser generated by the working substance 2 is incident to the total reflection mirror 1, and the laser reflected by the total reflection mirror 1 is incident to the double 45-degree reflection mirror A through the working substance 2; the double 45-degree reflecting mirrors A refract the incident laser by 180 degrees to obtain reflected laser which is parallel to the incident laser and has the opposite direction; on the transmission optical path of the reflected laser light of the double 45 ° mirror a, an output mirror 5 is arranged.
The main innovation of the application is as follows: a double 45-degree reflector A is additionally arranged between the working substance 2 and the output mirror 5, laser enters the output mirror after being folded back through the double 45-degree reflector A, and the optical axis of the output mirror is not coaxial with the optical axis of the working substance 2 any more, but is arranged in parallel with the optical axis of the working substance 2 from top to bottom. Therefore, the output mirror can be arranged at any position on the optical axis where the output mirror is located, and the adjustment range can reach the length of one cavity length at most. Therefore, the cavity length of the resonant cavity can be reduced according to requirements, and meanwhile, the longer adjusting distance between the output mirror and the working substance is kept, so that the laser output performance is improved.
it should be emphasized that the specific form of the double 45 ° mirror a is not limited in the present application, and the structure that can fold the optical path by 180 degrees is within the protection scope of the present application.
Based on the design concept, for fully understanding the present application, four embodiments are introduced below:
The first embodiment is as follows:
referring to fig. 1, the double 45 ° mirror a includes a first 45 degree total reflection mirror 3 and a second 45 degree total reflection mirror 4;
the two ends of the working substance 2 are respectively and coaxially provided with a total reflector 1 and a first 45-degree total reflector 3;
The included angle between the first 45-degree total reflection mirror 3 and the main optical axis of the working substance 2 is 45 degrees; the reflection light path of the first 45-degree total reflector 3 is vertical to the incident light path of the first 45-degree total reflector; a second 45-degree total reflector 4 is arranged on a reflection light path of the first 45-degree total reflector 3, and an included angle between the second 45-degree total reflector 4 and the reflection light path of the first 45-degree total reflector 3 is 45 degrees; the reflection light path of the second 45-degree total reflecting mirror 4 is perpendicular to the incident light path thereof, so that the incident light path of the first 45-degree total reflecting mirror 3 is parallel to and opposite to the reflection light path of the second 45-degree total reflecting mirror 4. On the reflection optical path of the second 45 degree total reflection mirror 4, an output mirror 5 is arranged.
therefore, the laser generated by the working substance 2 enters the total reflection mirror 1, is reflected by the total reflection mirror 1, and then enters the first 45-degree total reflection mirror 3 through the working substance 2; the first 45-degree total reflection mirror 3 reflects the incident light, and the reflected light is perpendicular to the incident light; the laser reflected by the first 45-degree total reflector 3 is incident to the second 45-degree total reflector 4, and the laser reflected by the second 45-degree total reflector 4 is parallel to the incident laser of the first 45-degree total reflector 3 but opposite in direction. Then, the laser light reflected by the second 45-degree total reflection mirror 4 is incident on the output mirror 5. Therefore, the laser oscillates between the total reflection mirrors 1 and the output mirror 5, and the length of the period of the light running in the resonant cavity is 2 (the linear distance from the total reflection mirror 1 to the first 45-degree total reflection mirror 3 + the linear distance from the first 45-degree total reflection mirror 3 to the second 45-degree total reflection mirror 4 + the linear distance from the second 45-degree total reflection mirror 4 to the output mirror 5).
Example two:
referring to fig. 2, in this embodiment, a polarizer 6 is added on the basis of the first embodiment; the polarizing plate 6 is coaxially disposed in the optical path between the working substance 2 and the total reflection mirror 1.
by adding the polarizing plate 6, output of linearly polarized laser light can be realized.
Example three:
Referring to fig. 3 and 4, in this embodiment, a Q-switching crystal 7 is added on the basis of the second embodiment. The Q-switched crystal 7 is coaxially arranged between the polaroid 6 and the total reflection mirror 1; the Q-switching crystal 7 and the polarizing plate 6 form a Q-switching optical modulator.
By adding the light Q-switching switch, the Q-switching output of the linear polarization laser can be realized.
Example four:
The present embodiment is different from the first embodiment in that, referring to fig. 5, the first 45-degree total reflection mirror 3 and the second 45-degree total reflection mirror 4 of the first embodiment are replaced with a prism for 180-degree folding of the optical path. Namely: the double 45 ° mirror a is realized directly by a prism.
To sum up, the utility model provides a two 45 book anti-solid laser resonator need the following content of important protection:
(1) the output mirror of the laser resonant cavity and the working substance form a resonant cavity through a double 45-degree reflecting mirror A. The double 45-degree reflecting mirrors A can be formed by two 45-degree total reflecting mirrors and can also be realized by a prism capable of realizing 180-degree refraction and reflection of a light path.
(2) Further covering the case where the cavity contains horizontal or vertical polarizers.
(3) The resonant cavity is further covered with an active or passive Q-switching crystal, and the situation of active electro-optical Q-switching and passive Q-switching devices is realized through the cooperation with the polaroid.
The utility model provides a two 45 reflect solid laser resonator through experiment and application product, uses this technical output to be greater than 800mj, the transfer Q laser of 8ns pulsewidth, and this like product is under with working substance and pumping condition, and the energy promotes 20% -30%.
From this can prove completely, the utility model discloses realize under the condition that reduces resonant cavity chamber length, keep output mirror and working substance to have longer regulation distance, through the distance of adjusting working substance and output mirror to improve laser output performance, including improving laser output energy and improving the light beam quality.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (5)
1. A double 45-degree refraction and reflection solid laser resonant cavity is characterized by comprising a total reflector (1), a working substance (2), a double 45-degree reflector (A) and an output mirror (5);
the two ends of the working substance (2) are respectively and coaxially provided with the total reflector (1) and the double 45-degree reflectors (A); the laser generated by the working substance (2) is incident to the total reflection mirror (1), and the laser reflected by the total reflection mirror (1) is incident to the double 45-degree reflection mirror (A) through the working substance (2); the double 45-degree reflecting mirror (A) refracts the incident laser by 180 degrees to obtain reflected laser parallel to the incident laser and in the opposite direction; and the output mirror (5) is arranged on the transmission light path of the reflected laser light of the double 45-degree reflecting mirror (A).
2. The dual 45 ° catadioptric solid-state laser resonator according to claim 1, wherein the dual 45 ° mirrors (a) comprise a first 45 ° total reflection mirror (3) and a second 45 ° total reflection mirror (4);
The included angle between the first 45-degree total reflection mirror (3) and the main optical axis of the working substance (2) is 45 degrees; the reflection light path of the first 45-degree total reflection mirror (3) is vertical to the incident light path of the first 45-degree total reflection mirror; the second 45-degree total reflector (4) is arranged on the reflection light path of the first 45-degree total reflector (3), and the included angle between the second 45-degree total reflector (4) and the reflection light path of the first 45-degree total reflector (3) is 45 degrees; the reflection light path of the second 45-degree total reflecting mirror (4) is perpendicular to the incident light path of the second 45-degree total reflecting mirror, so that the incident light path of the first 45-degree total reflecting mirror (3) is parallel to the reflection light path of the second 45-degree total reflecting mirror (4) and the direction of the incident light path is opposite.
3. The dual 45 ° catadioptric solid-state laser resonator of claim 1, wherein the dual 45 ° mirror (a) is a prism for 180 ° catadioptric light path.
4. A dual 45 ° catadioptric solid-state laser resonator according to claim 1, further comprising a polarizer (6); the polaroid (6) is coaxially arranged on an optical path between the working substance (2) and the total reflection mirror (1).
5. The dual 45 ° catadioptric solid-state laser resonator of claim 4, further comprising a Q-tuning crystal (7); the Q-switching crystal (7) is coaxially arranged between the polaroid (6) and the total reflection mirror (1); the Q-switching crystal (7) and the polarizing plate (6) form a light Q-switching switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920186519.1U CN209805087U (en) | 2019-02-02 | 2019-02-02 | Double 45-degree refraction and reflection solid laser resonant cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920186519.1U CN209805087U (en) | 2019-02-02 | 2019-02-02 | Double 45-degree refraction and reflection solid laser resonant cavity |
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| CN209805087U true CN209805087U (en) | 2019-12-17 |
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| CN201920186519.1U Ceased CN209805087U (en) | 2019-02-02 | 2019-02-02 | Double 45-degree refraction and reflection solid laser resonant cavity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115347443A (en) * | 2022-10-20 | 2022-11-15 | 中国科学院长春光学精密机械与物理研究所 | Laser device |
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2019
- 2019-02-02 CN CN201920186519.1U patent/CN209805087U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115347443A (en) * | 2022-10-20 | 2022-11-15 | 中国科学院长春光学精密机械与物理研究所 | Laser device |
| CN115347443B (en) * | 2022-10-20 | 2023-02-14 | 中国科学院长春光学精密机械与物理研究所 | Laser device |
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Decision date of declaring invalidation: 20220506 Decision number of declaring invalidation: 55673 Granted publication date: 20191217 |