CN107742818A - A kind of corner medium and the compact laser based on the corner medium - Google Patents
A kind of corner medium and the compact laser based on the corner medium Download PDFInfo
- Publication number
- CN107742818A CN107742818A CN201711189815.9A CN201711189815A CN107742818A CN 107742818 A CN107742818 A CN 107742818A CN 201711189815 A CN201711189815 A CN 201711189815A CN 107742818 A CN107742818 A CN 107742818A
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- reflection
- plane
- face
- light output
- reflective mirror
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Classifications
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- 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
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/0606—Crystal lasers or glass lasers with polygonal cross-section, e.g. slab, prism
-
- 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
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/0615—Shape of end-face
-
- 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
- H01S3/06—Construction or shape of active medium
- H01S3/0619—Coatings, e.g. AR, HR, passivation layer
- H01S3/0621—Coatings on the end-faces, e.g. input/output surfaces of the laser light
- H01S3/0623—Antireflective [AR]
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
Abstract
The invention provides a kind of corner medium, there is the light output end being oppositely arranged, reflection end face, and the perisporium extended between light output end and reflection end face, light output end is plane, and reflection end face is that three fully reflecting surfaces intersect vertically the triangular prism method to be formed.Present invention also offers a kind of compact laser, including corner medium, two-way total reflective mirror and two-way semi-reflective mirror, two-way total reflective mirror has the fully-reflected plane being oppositely arranged with light output end, two-way semi-reflective mirror has the half reflection plane being oppositely arranged with light output end, and laserresonator is formed between fully-reflected plane, half reflection plane and reflection end face.Gain media of the corner medium of the present invention as laser, resonator length is effectively improved on the premise of space length is not increased, be advantageous to small divergence angle output, simultaneously, using the light beam reflection compensation in corner medium, beam aberration, optical axis drift and beam quality can decline caused by effective compensation pumping inhomogeneities.
Description
Technical field
The present invention relates to field of laser device technology, more particularly to a kind of corner medium, further relates to a kind of based on corner Jie
The compact laser of matter.
Background technology
Laser is the part that ray machine configuration is the most complicated in laser system, and laser performance and configuration directly determine sharp
The space distribution of the ray machine configurations of photosystem, technical system and other each group parts.In laser radar, laser ranging, target
Application field, the lasers of compact such as instruction are the targets of researcher's long-sought.
The miniature laser system integrated by compact laser can be directly integrated with electro-optical system, be mounted in individual soldier, vehicle,
The platforms such as helicopter, unmanned plane are used for ranging, survey high, guidance, have stabilization lasting for a long time to need in military affairs, defence, civil area
Ask.In the application aspect being had higher requirements to the laser system performance indications such as ranging, it is desirable to which laser has higher energy, small hair
Angle, high light beam quality, high optical axis stability are dissipated, it is necessary to using compact solid state laser technological approaches.In laser design,
Short cavity can cause the angle of divergence is big, higher energy output can caused by the hot inhomogeneities of pumping beam drift, each index it is comprehensive
Close in matching process, the realization of compact configuration is always one of bottleneck of laser engineer applied.
The content of the invention
For technical problem present in above-mentioned prior art, the invention provides a kind of corner medium and one kind to be based on
The compact laser of the corner medium, for solve the beam divergence angle that laser compact configuration brings is big, beam quality compared with
The problem of poor, to meet in laser acquisition, laser pointer system the needs of to compact, high-performance laser.
The technical scheme is that：A kind of corner medium, for the gain media as laser, it is characterised in that：
Be oppositely arranged light output end, reflection end face, and the perisporium that extends between light output end and reflection end face, it is described go out
Light end face is plane, and the reflection end face is that three fully reflecting surfaces intersect vertically the triangular prism method to be formed.
As preferred：The perisporium of the corner medium is in drum type.
As preferred：The corner medium is Nd:YAG or Nd:YVO4.
The present invention another technical scheme be：A kind of compact laser, including two-way total reflective mirror and two-way semi-reflective mirror, also
Including the corner medium described in above-mentioned any one；
The two-way total reflective mirror has the fully-reflected plane being oppositely arranged with the light output end, the two-way semi-reflective mirror tool
There are the half reflection plane being oppositely arranged with the light output end, the fully-reflected plane, half reflection plane and the reflection end face
Between form laserresonator.
As preferred：The fully-reflected plane is generally aligned in the same plane with the half reflection plane.
As preferred：The fully-reflected plane is bonded the light output end with the half reflection plane and set.
As preferred：Also include being arranged on pumping source of the two-way total reflective mirror backwards to the side of the corner medium.
As preferred：The pumping source uses centre wavelength 808nm 3kw semiconductor array modules.
As preferred：The surface of the two-way total reflective mirror is coated with 1064nm and is all-trans film and 808nm anti-reflection films, and described two-way half
The surface of anti-mirror is coated with half anti-films of 1064nm and 808nm is all-trans film.
As preferred：Also include the pumping source set around the perisporium of the corner medium.
The beneficial effects of the invention are as follows：The present invention using geometry for corner cube corner medium as laser increasing
Beneficial medium, resonator length is effectively improved on the premise of space length is not increased, is advantageous to small divergence angle output, together
When, can beam aberration, optical axis drift caused by effective compensation pumping inhomogeneities using the light beam reflection compensation in corner medium
And beam quality declines.
Laser configuration of the invention based on corner medium has advantages below：
(1) laser is occurred when laser resonance intracavitary vibrates by three fully reflecting surfaces of the reflection end face of corner medium
It is totally reflected three times, the chamber length of laserresonator is most of to be made up of the light path in corner medium, is totally reflected three times spatially certainly
It is dynamic to fold, the long problem of one-dimensional length of linear medium is avoided, relative to two-dimentional refrative cavity in terms of the stretching that chamber is grown
It is more advantageous.The configuration makes it possible that the chamber under tight space grows stretching, is advantageous to narrowing for laser divergence angle.
(2) corner medium can be to as realize symmetrical sex reversal, therefore laser beam is in laser resonance intracavitary reciprocating vibration,
Automatically left and right and upper and lower pumping inhomogeneities, light beam asymmetry can be compensated, effectively avoid light beam distortion and
Optical axis drifts about.
(3) by reducing the distance between fully-reflected plane, half reflection plane and light output end, laser can further be compressed
The volume of device, can be by two-way total reflective mirror, the light output end of two-way semi-reflective mirror Integrated design to corner medium.
(4) corner medium can be different material, such as Nd:YAG、Nd:YVO4 etc., with suitable for various different wave lengths
Laser, reach the chamber length of tight space stretch laser resonator, compensate the purpose of pumping fuel factor and light beam inequality.
(5) laser configuration of the invention can be also expanded applied to side pump pattern, realize that big energy (high power) exports, pump
Pu source is set around the perisporium of corner medium, and pumping source can enter medium from the side surface coupling of corner medium, can still realize resonator
Tight space stretching, the inequality of light beam and pumping thermal effect compensation.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the corner medium of the embodiment of the present invention；
Fig. 2 is that the beam aberration of corner medium compensates schematic diagram；
Fig. 3 is the structural representation of the laser of the embodiment of the present invention 1.
1 in figure, corner medium；11st, light output end；12nd, end face is reflected；13rd, perisporium；2nd, two-way total reflective mirror；3rd, two-way half
Anti- mirror；4th, pumping source.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below
Detailed description.Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
Therefore, below the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to what the present invention protected
Scope.
As shown in figure 1, the embodiments of the invention provide a kind of corner medium 1, should for the gain media as laser
Corner medium 1 has the light output end 11 being oppositely arranged, reflection end face 12, and between light output end 11 and reflection end face 12
The perisporium 13 of extension, light output end 11 are plane, and reflection end face 12 is that three fully reflecting surfaces intersect vertically the triangular prism method to be formed.
Optionally embodiment, the perisporium 13 of corner medium 1 is in drum type.Drum type refers to gradually justify from the middle to both ends
The sliding shape shunk.Specifically, the light output end 11 of corner medium 1 is the round and smooth plane in an edge, reflects three of end face 12
The area equation of fully reflecting surface, and reflect the center of the summit of the end face 12 vertically projection to light output end 11 and light output end 11
Overlap.Projection of the end face 12 vertically to light output end 11 is reflected to be respectively positioned in the range of the edge of light output end 11.Corner medium 1
Perisporium 13 is from the edge of light output end 11 to the extension of the reflection direction of end face 12, and first gradual expansion then gradually tapers up and light output end
12 three fully reflecting surfaces are crossed to form.
Three fully reflecting surfaces of corner medium 1 can be realized to light in corner medium 1 through but not limited in the following manner
The total reflection of son：
First way, the material of corner medium 1 is selected by calculating, the light for making to enter in corner medium 1 can only be through
Three fully reflecting surfaces are reflected, and can not be projected through three fully reflecting surfaces, so as to realize to entering the light in corner medium 1
Total reflection.
The second way, by three fully reflecting surface plating total reflection films, to realize to entering the light in corner medium 1
Total reflection.
Fig. 2 shows the beam aberration compensation schematic diagram of corner medium 1.As shown in Fig. 2 light is from the entering angle of light output end 11
The light of corner medium 1 through three fully reflecting surfaces, occurs to be totally reflected three times altogether successively, then is projected from light output end 11, adds light and exists
Light path in corner medium 1.
Optionally embodiment, corner medium 1 are Nd:YAG or Nd:YVO4.In addition, corner medium 1 is gone back
It can be other materials, with the laser suitable for various different wave lengths, reach the chamber of tight space stretch laser resonator
The purpose of long, compensation pumping fuel factor and light beam inequality.
As shown in figure 3, the embodiment of the present invention additionally provides a kind of compact laser, including two-way total reflective mirror 2, two-way half
Anti- mirror 3 and above-mentioned corner medium 1.
Two-way total reflective mirror 2 has the fully-reflected plane being oppositely arranged with light output end 11, and two-way semi-reflective mirror 3 has and light extraction
The half reflection plane that end face 11 is oppositely arranged, laser resonance is formed between fully-reflected plane, half reflection plane and reflection end face 12
Chamber.
Optionally embodiment, fully-reflected plane are generally aligned in the same plane with half reflection plane, to reduce laser resonance
The space of chamber, make laser that there is smaller volume.
Optionally embodiment, fully-reflected plane are bonded light output end 11 with half reflection plane and set.So may be used
Further to compress the volume of laser.
It should be noted that in the case where not conflicting, the feature in embodiment and/or embodiment in the present invention can
To be combined with each other.
Embodiment 1:
As shown in figure 3, a kind of compact laser provided in an embodiment of the present invention, including it is corner medium 1, pumping source 4, double
To total reflective mirror 2 and two-way semi-reflective mirror 3.
Corner medium 1 is Nd:YAG.Corner medium 1 has the light output end 11 being oppositely arranged, reflection end face 12, Yi Ji
The perisporium 13 extended between light output end 11 and reflection end face 12.In drum type, (drum type refers to from centre the perisporium 13 of corner medium 1
To the shape of the gradual round and smooth contraction in both ends).
The light output end 11 of corner medium 1 is a plane.Reflection end face 12 is that three fully reflecting surfaces intersect vertically what is formed
Triangular prism method.The area equation of three fully reflecting surfaces, and reflect end face 12 summit vertically the projection to light output end 11 with going out
The center superposition of light end face 11.
Pumping source 4 is coupled into corner using centre wavelength 808nm 3kw semiconductor array modules by shaping lens
Medium 1.
Two-way total reflective mirror 2 can be passed through for wavelength 808nm light, and wavelength 1064nm light is all reflected, and can not be passed through.
The surface of two-way total reflective mirror 2 is coated with 1064nm and is all-trans film and 808nm anti-reflection films.The 1064nm films that are all-trans can be realized pair
Wavelength is the total reflection of 1064nm light.808nm anti-reflection films can pass completely through for the light that wavelength is 808nm.
Two-way semi-reflective mirror 3 can be passed through for wavelength 1064nm light, and wavelength 808nm light is all reflected, and can not be passed through.
The surface of two-way semi-reflective mirror 3 is coated with half anti-films of 1064nm and 808nm is all-trans film.Half anti-films of 1064nm can be for wavelength
Passed through for 1064nm light, the light of other wavelength can not pass through half anti-films of 1064nm.The 808nm films that are all-trans can be realized and be to wavelength
The total reflection of 808nm light.
Two-way total reflective mirror 2 and two-way semi-reflective mirror 3 are disposed in parallel in the side of the light output end 11 of corner medium 1, two-way complete
Anti- mirror 2 is with projection of the two-way semi-reflective mirror 3 to the light output end 11 of corner medium 1 in the range of the edge of light output end 11.
Two-way total reflective mirror 2 towards the side of light output end 11 be fully-reflected plane.Fully-reflected plane is plane and and light extraction
End face 11 be arranged in parallel.
Two-way semi-reflective mirror 3 towards the side of light output end 11 be half reflection plane.Half reflection plane is plane and and light extraction
End face 11 be arranged in parallel.
Laserresonator is formed between fully-reflected plane, half reflection plane and reflection end face 12.
Fully-reflected plane is generally aligned in the same plane with half reflection plane, to reduce the space of laserresonator, makes laser utensil
There is smaller volume.
Pumping source 4 is arranged on two-way total reflective mirror 2 backwards to the side of corner medium 1.Light caused by pumping source 4 passes through two-way complete
Enter laserresonator after anti-mirror 2.
Pumping source 4 is coupled into corner using centre wavelength 808nm 3kw semiconductor array modules by shaping lens
Medium 1.The fully-reflected plane of two-way total reflective mirror 2, the half reflection plane of two-way semi-reflective mirror 3 are formed towards the side of corner medium 1
1064nm laserresonators.
Two-way total reflective mirror 2 is coated with 1064nm and is all-trans film, 808nm anti-reflection films, and 808nm anti-reflection films make caused by pumping source 4
808nm laser (wavelength 808nm) is completely into 1064nm laser resonance intracavitary, the 1064nm formed through the gain of corner medium 1
Laser (wavelength 1064nm) film that can be then all-trans by 1064nm is reflected back inside corner medium 1 and continues oscillator gain.
Two-way semi-reflective mirror 3 is coated with half anti-films of 1064nm, 808nm is all-trans film, half anti-films of 1064nm make through the gain of corner medium 1
The 1064nm laser of formation can project from two-way semi-reflective mirror 3, the 808nm laser without gain then through 808nm be all-trans film reflection
Go back to the inside of corner medium 1 and carry out oscillator gain.Corner medium 1 produces gain by absorbing 808nm pump lights, realizes that 1064nm swashs
Light output.
Compact laser configuration feature provided in an embodiment of the present invention is as follows：
(1) 1064nm laser is all-trans when laser resonance intracavitary vibrates by three of the reflection end face 12 of corner medium 1
Penetrate face to occur to be totally reflected three times, the chamber length of laserresonator is most of to be made up of the light path in corner medium 1, is totally reflected three times
Spatially auto-folder, avoid the long problem of one-dimensional length of linear medium, the drawing grown relative to two-dimentional refrative cavity in chamber
It is also more advantageous to stretch aspect.The configuration makes it possible that the chamber under tight space grows stretching, is advantageous to laser divergence angle
Narrow.
(2) corner medium can realize symmetrical sex reversal to picture, therefore 1064nm laser beams are reciprocal in laser resonance intracavitary
During vibration, left and right and upper and lower pumping inhomogeneities, light beam asymmetry can be compensated automatically, effectively avoid light beam
Distortion and optical axis drift.
Embodiment 2：
The present embodiment 2 and the difference of embodiment 1 are：Compact laser provided in an embodiment of the present invention it is two-way complete
Anti- mirror and two-way semi-reflective mirror are integrally disposed in the light output end of corner medium.I.e. fully-reflected plane is bonded out with half reflection plane
Light end face is set, and so can further compress the volume of laser.
Embodiment 3：
The present embodiment 3 and the difference of embodiment 1 are：The pumping source of compact laser provided in an embodiment of the present invention
Perisporium around corner medium is set.Expand the corner medium of the present invention and be applied to side pump pattern, realize big energy (Gao Gong
Rate) export, the perisporium of pumping source from pyramid medium is coupled into corner medium, can still realize that the tight space of laserresonator is drawn
Stretch, the inequality of light beam and pumping thermal effect compensation.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.
Claims (10)
- A kind of 1. corner medium, for the gain media as laser, it is characterised in that：With the light output end being oppositely arranged (11) end face (12), are reflected, and the perisporium (13) extended between light output end (11) and reflection end face (12), the light extraction End face (11) is plane, and reflection end face (12) is that three fully reflecting surfaces intersect vertically the triangular prism method to be formed.
- 2. corner medium (1) according to claim 1, it is characterised in that：The perisporium (13) of the corner medium (1) is in drum Shape.
- 3. corner medium (1) according to claim 1 or 2, it is characterised in that：The corner medium (1) is Nd:YAG or Person Nd:YVO4.
- 4. a kind of compact laser, including two-way total reflective mirror (2) and two-way semi-reflective mirror (3), it is characterised in that：Also include basis Corner medium (1) in claims 1 to 3 described in any one；The two-way total reflective mirror (2) has the fully-reflected plane being oppositely arranged with the light output end (11), and described two-way half is anti- Mirror (3) has the half reflection plane being oppositely arranged with the light output end (11), the fully-reflected plane, half reflection plane and institute State reflection end face (12) between form laserresonator.
- 5. compact laser according to claim 4, it is characterised in that：The fully-reflected plane is put down with the half reflection Face is generally aligned in the same plane.
- 6. compact laser according to claim 5, it is characterised in that：The fully-reflected plane is put down with the half reflection Face is bonded the light output end (11) setting.
- 7. the compact laser according to any one in claim 4 to 6, it is characterised in that：Also include being arranged on institute State pumping source (4) of the two-way total reflective mirror (2) backwards to the side of the corner medium (1).
- 8. compact laser according to claim 7, it is characterised in that：The pumping source (4) uses centre wavelength 808nm 3kw semiconductor array modules.
- 9. compact laser according to claim 8, it is characterised in that：The surface of the two-way total reflective mirror (2) is coated with 1064nm is all-trans film and 808nm anti-reflection films, and the surface of the two-way semi-reflective mirror (3) is coated with half anti-films of 1064nm and 808nm is all-trans Film.
- 10. the compact laser according to any one in claim 4 to 6, it is characterised in that：Also include around described The pumping source (4) that the perisporium (13) of corner medium (1) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711189815.9A CN107742818A (en) | 2017-11-24 | 2017-11-24 | A kind of corner medium and the compact laser based on the corner medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711189815.9A CN107742818A (en) | 2017-11-24 | 2017-11-24 | A kind of corner medium and the compact laser based on the corner medium |
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| CN107742818A true CN107742818A (en) | 2018-02-27 |
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| CN201711189815.9A Pending CN107742818A (en) | 2017-11-24 | 2017-11-24 | A kind of corner medium and the compact laser based on the corner medium |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5121404A (en) * | 1988-11-16 | 1992-06-09 | Hamamatsu Photonics K.K. | Optically pumped solid laser |
| CN105514776A (en) * | 2016-01-25 | 2016-04-20 | 中国工程物理研究院应用电子学研究所 | Improved folding corner prism pulse Q-switching laser resonant cavity |
| CN207542557U (en) * | 2017-11-24 | 2018-06-26 | 顶扬光电技术(上海)有限公司 | A kind of corner medium and the compact laser based on the corner medium |
-
2017
- 2017-11-24 CN CN201711189815.9A patent/CN107742818A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5121404A (en) * | 1988-11-16 | 1992-06-09 | Hamamatsu Photonics K.K. | Optically pumped solid laser |
| CN105514776A (en) * | 2016-01-25 | 2016-04-20 | 中国工程物理研究院应用电子学研究所 | Improved folding corner prism pulse Q-switching laser resonant cavity |
| CN207542557U (en) * | 2017-11-24 | 2018-06-26 | 顶扬光电技术(上海)有限公司 | A kind of corner medium and the compact laser based on the corner medium |
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