CN113794096A - Laser resonant cavity and laser - Google Patents
Laser resonant cavity and laser Download PDFInfo
- Publication number
- CN113794096A CN113794096A CN202110973575.1A CN202110973575A CN113794096A CN 113794096 A CN113794096 A CN 113794096A CN 202110973575 A CN202110973575 A CN 202110973575A CN 113794096 A CN113794096 A CN 113794096A
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- CN
- China
- Prior art keywords
- sleeve
- laser
- mirror
- resonant cavity
- total reflection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003292 glue Substances 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 18
- 239000013078 crystal Substances 0.000 claims abstract description 14
- 229910000833 kovar Inorganic materials 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 230000003749 cleanliness Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08059—Constructional details of the reflector, e.g. shape
Abstract
The invention discloses a laser resonant cavity and a laser, wherein the laser resonant cavity comprises: the device comprises a total reflection sleeve 1, a total reflection mirror 5, a Q-switched crystal 7, a first rod sleeve 2, a working substance 3 and a second rod sleeve 4; the working substance 3 is in a rod shape and comprises an input end and an output end which are opposite, wherein the input end is encapsulated with the first rod sleeve 2, and the output end is encapsulated with the second rod sleeve 4; the total reflection mirror 5 is fixed in the total reflection sleeve 1 through fixing glue, the first rod sleeve 2 is glued in the total reflection sleeve 1 and is oppositely arranged with the total reflection mirror 5, and the first rod sleeve 2 is fixed with the Q-switched crystal 7 through fixing glue between the total reflection mirror 5. The embodiment of the invention reduces the use of redundant mechanical fixing pieces, thereby reducing the volume of the mechanical parts of the resonant cavity, and improving the structural stability and reliability of the resonant cavity by gluing the fixing glue.
Description
Technical Field
The invention relates to the technical field of laser application, in particular to a laser resonant cavity and a laser.
Background
The small and micro laser range finders and laser cameras are widely applied in the application field. As a core device of the laser range finder, a small micro laser is indispensable. The volume of the laser is required to be as small as possible and the weight is required to be as light as possible on the premise of ensuring stable and reliable laser output; and the laser resonant cavity is ensured not to be detuned under the conditions of strong impact vibration and high and low temperature.
Disclosure of Invention
The embodiment of the invention provides a laser resonant cavity and a laser, which are used for reducing the volume of a mechanical part and improving the structural stability and reliability of the resonant cavity.
The embodiment of the invention provides a laser resonant cavity, which comprises: the device comprises a total reflection sleeve 1, a total reflection mirror 5, a Q-switched crystal 7, a first rod sleeve 2, a working substance 3 and a second rod sleeve 4;
the working substance 3 is in a rod shape and comprises an input end and an output end which are opposite, wherein the input end is encapsulated with the first rod sleeve 2, and the output end is encapsulated with the second rod sleeve 4;
the total reflection mirror 5 is fixed in the total reflection sleeve 1 through fixing glue, the first rod sleeve 2 is glued in the total reflection sleeve 1 and is oppositely arranged with the total reflection mirror 5, and the first rod sleeve 2 is fixed with the Q-switched crystal 7 through fixing glue between the total reflection mirror 5.
In one embodiment, a gasket 6 is further disposed between the total reflection mirror 5 and the Q-switching crystal 7.
In one embodiment, the output end of the working substance 3 is coated with an output film layer.
In one embodiment, the first and second jackets 2, 4 are both kovar alloy jackets.
In one embodiment, the fully inverted sleeve 1 is a kovar alloy sleeve.
In one embodiment, the fixing glue is 914 glue.
The embodiment of the invention also provides a laser, which comprises the resonant cavity and an output mirror;
the output mirror and the output end of the working substance 3 of the resonant cavity are adjacently arranged along a light path.
In one embodiment, the output mirror is aligned parallel to the all-mirror 5 during the curing time of the fixing glue of the all-mirror 5 of the resonator.
In one embodiment, the laser further includes a housing, the output mirror and the resonant cavity are mounted on the housing, and the housing is a non-metal housing.
The embodiment of the invention reduces the use of redundant mechanical fixing pieces, thereby reducing the volume of the mechanical parts of the resonant cavity, and improving the structural stability and reliability of the resonant cavity by gluing the fixing glue.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a cross-sectional view of a resonant cavity of the present invention;
FIG. 2 is a front view of a resonant cavity of the present invention;
fig. 3 is a side view of a resonant cavity of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The requirement on the alignment precision of cavity mirrors in front of and behind the laser resonant cavity is extremely high within a range of seconds. Generally, a laser adopts an adjustable mechanical structure to align a resonant cavity, but the tuned laser resonant cavity is often detuned in tests of stress release, impact vibration, high and low temperature and the like of mechanical parts.
The illumination intensity of laser is very high, so the requirement on the cleanliness of each optical component in the laser is very high, and the laser must ensure the stability and reliability of laser output for a long time under a severe detection use environment, so that the laser or a resonant cavity is required to be sealed. Conventional methods of sealing individual optical elements necessarily add bulk to the laser.
The embodiment of the invention provides a laser resonant cavity, which comprises: the device comprises a total reflection sleeve 1, a total reflection mirror 5, a Q-switched crystal 7, a first rod sleeve 2, a working substance 3 and a second rod sleeve 4;
the working substance 3 is in a rod shape and comprises an input end and an output end which are opposite, wherein the input end is encapsulated with the first rod sleeve 2, and the output end is encapsulated with the second rod sleeve 4;
the total reflection mirror 5 is fixed in the total reflection sleeve 1 through fixing glue, the first rod sleeve 2 is glued in the total reflection sleeve 1 and is oppositely arranged with the total reflection mirror 5, and the first rod sleeve 2 is fixed with the Q-switched crystal 7 through fixing glue between the total reflection mirror 5.
As shown in fig. 1, 2 and 3, the total reflection mirror 5 in this example is arranged in the total reflection sleeve 1 and is fixed by gluing with a fixing glue, and the working substance 3 is in a rod shape, for example, the working substance 3 may be a YAG crystal rod. The working substance 3 comprises opposite input and output ends, wherein the input end is encapsulated with the first sleeve 2 and the output end is encapsulated with the second sleeve 4. In one embodiment, the output end of the working substance 3 is coated with an output film layer, such as an anti-reflection film. As shown in fig. 1 and 2, the first sleeve 2 is sleeved in the transflective sleeve 1 and is disposed opposite to the transflective mirror 5 along the light path direction, and the first sleeve 2 may also be fixed to the transflective mirror 5 by gluing with a fixing glue. A Q-switched crystal 7 is glued between the first rod sleeve 2 and the total reflection mirror 5. The gluing in this example can be done with 914 glue. The mode of gluing through the fixed glue can satisfy the sealed effect of resonant cavity in this example to because most optical element is sealed in the totally-reflecting sleeve, dust, aqueous vapor etc. are difficult to get into, have guaranteed optical element's cleanliness factor, and then have guaranteed that the laser instrument is reliable and stable of long-time performance under abominable detection service environment. Meanwhile, the scheme of the embodiment greatly reduces the use of redundant mechanical fixing pieces, reduces the volume of the mechanical parts of the resonant cavity, and improves the structural stability and reliability of the resonant cavity by gluing the fixing glue.
As shown in fig. 1, in one embodiment, a gasket 6 is further disposed between the total reflection mirror 5 and the Q-switching crystal 7.
In one embodiment, the first and second jackets 2, 4 are both kovar alloy jackets.
In one embodiment, the fully inverted sleeve 1 is a kovar alloy sleeve.
In this example, the transflective sleeve 1, the first sleeve 2 and the second sleeve 4 may be made of a material having a thermal expansion coefficient similar to that of glass, such as KOVAR alloy KOVAR, which has a thermal expansion coefficient similar to that of glass and therefore can match with that of a general transflective lens material, thereby ensuring high and low temperature reliability and stability of the laser resonator.
In conclusion, the resonant cavity provided by the invention eliminates a series of problems caused by mechanical part stress release, high and low temperature, impact vibration and the like, and further ensures the alignment precision of the laser resonant cavity. Because most of optical elements are sealed in the full-reflection sleeve, dust, water vapor and the like are difficult to enter, the cleanliness of the optical elements is ensured, and the stability and reliability of long-time performance of the laser under a severe detection use environment are ensured. The resonant cavity adopts a gluing mode, so that the using amount of metal parts such as screws and the like is reduced, the volume of mechanical parts is reduced, and the volume and the weight of the laser are reduced.
The embodiment of the invention also provides a laser, which comprises the resonant cavity and the output mirror;
the output mirror and the output end of the working substance 3 of the resonant cavity are adjacently arranged along a light path.
In one embodiment, the output mirror is aligned parallel to the all-mirror 5 during the curing time of the fixing glue of the all-mirror 5 of the resonator.
In one embodiment, the laser further includes a housing, the output mirror and the resonant cavity are mounted on the housing, and the housing is a non-metal housing.
The laser in this example comprises the resonant cavity and the output mirror, and the output mirror is arranged adjacent to the output end of the working substance 3 of the resonant cavity along the optical path. For example, the output mirror is disposed adjacent to the output end of the YAG crystal rod. And the output mirror is adjusted to be parallel to the full-reflecting mirror 5 within the time of curing the fixing glue of the full-reflecting mirror 5 of the resonant cavity. For example, when the adhesive is glued by 914 glue, the adhesive is cured for 1 hour at room temperature and is completely cured for 3 hours, and the high temperature and the low temperature after the curing are basically free of pollution. And in the gluing and curing time, the flatness of the total reflecting mirror 5 and the output mirror surface of the resonant cavity can be adjusted by using corresponding tools and the collimator, the tools and the collimator are taken down after curing, and the resonant cavity is assembled and adjusted.
By the scheme of the example, a nonmetal material with lower density, such as polysulfone, can be selected as the housing, so that the weight of the laser is further reduced.
In the specific implementation process, 10 lasers are sampled from the laser for impact vibration and high and low temperature (-40-60 ℃) tests, and the data comparison before and after the tests is good, so that the resonant cavity has great popularization value.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A laser resonator, comprising: the device comprises a total reflection sleeve (1), a total reflection mirror (5), a Q-switching crystal (7), a first rod sleeve (2), a working substance (3) and a second rod sleeve (4);
the working substance (3) is in a rod shape and comprises an input end and an output end which are opposite, wherein the input end is encapsulated with the first rod sleeve (2), and the output end is encapsulated with the second rod sleeve (4);
it fixes to reflect mirror (5) entirely through the fixed glue in reflecting sleeve (1) entirely, first stick cover (2) veneer is in reflect sleeve (1) entirely, and with it sets up to reflect mirror (5) entirely relatively, just first stick cover (2) with it is fixed with through the fixed glue between mirror (5) entirely to transfer Q crystal (7).
2. A laser resonator according to claim 1, characterized in that a washer (6) is further arranged between the totally reflecting mirror (5) and the Q-switched crystal (7).
3. A laser resonator according to claim 1, characterized in that the output of the working substance (3) is coated with an output film layer.
4. A laser resonator according to any of claims 1-3, characterized in that the first (2) and second (4) rod sleeves are kovar alloy rod sleeves.
5. A laser resonator according to any of claims 1-3, characterized in that the totally reflecting sleeve (1) is a kovar alloy sleeve.
6. A laser resonator according to any of claims 1-3, wherein the fixing glue is 914 glue.
7. A laser comprising a resonator cavity according to any of claims 1 to 6 and an output mirror;
the output mirror and the output end of the working substance (3) of the resonant cavity are arranged adjacently along a light path.
8. A laser according to claim 7, characterized in that the output mirror is aligned parallel to the fully reflecting mirror (5) during the curing time of the glue holding the fully reflecting mirror (5) of the resonator.
9. The laser of claim 7, further comprising a housing, said output mirror and said resonator being mounted on said housing, said housing being a non-metallic housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973575.1A CN113794096A (en) | 2021-08-24 | 2021-08-24 | Laser resonant cavity and laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973575.1A CN113794096A (en) | 2021-08-24 | 2021-08-24 | Laser resonant cavity and laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113794096A true CN113794096A (en) | 2021-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110973575.1A Pending CN113794096A (en) | 2021-08-24 | 2021-08-24 | Laser resonant cavity and laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113794096A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209200361U (en) * | 2018-12-28 | 2019-08-02 | 北京华莱科技有限公司 | A kind of short-pulse laser of integration bonding |
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2021
- 2021-08-24 CN CN202110973575.1A patent/CN113794096A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209200361U (en) * | 2018-12-28 | 2019-08-02 | 北京华莱科技有限公司 | A kind of short-pulse laser of integration bonding |
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Application publication date: 20211214 |