CN108565666A - Nd is processed using Brewster's angle:The method of YAG laser crystal - Google Patents
Nd is processed using Brewster's angle:The method of YAG laser crystal Download PDFInfo
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- CN108565666A CN108565666A CN201810347595.6A CN201810347595A CN108565666A CN 108565666 A CN108565666 A CN 108565666A CN 201810347595 A CN201810347595 A CN 201810347595A CN 108565666 A CN108565666 A CN 108565666A
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- crystal
- angle
- brewster
- ray
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Lasers (AREA)
Abstract
Nd is processed using Brewster's angle the invention discloses a kind of:The method of YAG laser crystal, including：Sorting, orientation, cutting and the polishing of crystal；The sorting, using the visible scattering point of He Ne laser irradiation naked eyes；The orientation, using X ray direction finders；The crystal-cut, using X ray direction finders；The polishing is polished using four axis polishing grinding machines of diamond micro mist.Brewster's angle processing method of the present invention is suitable for laser crystal and processes, and processing technology is simple and reliable, and versatility is good, does not have to plated film, threshold for resisting laser damage is high, improves the service life of crystal and reduces processing cost.
Description
Technical field
The present invention relates to functional crystal manufacture fields, more particularly to a kind of processing method suitable for laser crystal.
Background technology
Now, the mode of plated film after the processing of laser crystal is generally oriented, cuts and polished, can after optical element film coated
To significantly improve the performance of optical element." light just has film " is the famous dictum of optical field, plated film after optical element polishing
The always important component of optical field, plated film are made that important tribute as the development that a proprietary technology is optical device
It offers.
But plated film complex process itself, high, the optical element overall cost after plated film is required to the polishing of optical element
Height, and falling off for film is be easy to cause after plated film, surface smoothness reduces, and film layer is easy to be damaged by laser in use
Wound.If there is a kind of crystal pro cessing technology energy structure of not plated film achievees the effect that plated film will substantially reduce the cost of optical element,
And use the laser crystal of Brewster's angle processing that can reach approximately the effect.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that one kind processing Nd by Brewster's angle:YAG laser crystal
Method.
It is proposed by the present invention a kind of using Brewster's angle processing Nd:The method of YAG laser crystal, it is characterised in that：It presses
It is carried out according to following steps：
The sorting of step 1, crystal
The sorting, using the visible scattering point of He-Ne laser irradiation naked eyes；
Step 2, the orientation of crystal
The orientation, using X-ray direction finder；The crystal-cut, using X-ray direction finder；
The cutting of step 3, crystal
Brewster's angle is processed into two end faces of laser crystal by the crystal-cut using X-ray direction finder, and
Ensure the depth of parallelism, Cr:Refractive index of the YAG laser crystal at 1064nm is 1.9169, and Nd can be calculated:The cloth of YAG crystal
This spy angle α of scholar1=63.2.
The polishing of step 4, crystal
The polishing is polished using four axis polishing grinding machines of diamond micro mist.
Further, the Brewster's angle of the cutting of the crystal, incident ray is at incident interface with Brewster's angle
When incident, refracted light can be propagated along the direction for the side for being parallel to optical element, pass through same cloth scholar in other end
The reversed of this special angle is refracted into air dielectric, and such incident ray passes through Nd:After YAG crystal, emergent ray and incident ray
It is parallel.
The present invention processes Nd using Brewster's angle:YAG crystal methods can reach approximately conventional laser using this method
The effect of processing can be realized and avoid crystal coating, and can reach identical or even more better than plated film technique effect, to
Substantially reduce Nd:The processing cost of YAG laser crystal.
Description of the drawings
Fig. 1 is the schematic diagram of Brewster's angle laser crystal processing.
Fig. 2 is to process Nd using Brewster's angle:The schematic diagram of YAG laser crystal.
Specific implementation mode
The present invention proposes a kind of using Brewster's angle processing Nd:The method of YAG laser crystal, in accordance with the following steps into
Row：
The sorting of step 1, crystal
The sorting, using the visible scattering point of He-Ne laser irradiation naked eyes；
Step 2, the orientation of crystal
The orientation, using X-ray direction finder；The crystal-cut, using X-ray direction finder；
The cutting of step 3, crystal
Brewster's angle is processed into two end faces of laser crystal by the crystal-cut using X-ray direction finder, and
Ensure the depth of parallelism；The Brewster's angle of the cutting of the crystal, incident ray when incident interface is with brewster angle incidence,
Its refracted light can be propagated along the direction for the side for being parallel to optical element, in other end by same Brewster's angle
Reversed to be refracted into air dielectric, such incident ray passes through Nd:After YAG crystal, emergent ray is parallel with incident ray；Cr:
Refractive index of the YAG laser crystal at 1064nm is 1.9169, and Nd can be calculated:The Brewster's angle α of YAG crystal1=
63.2°。
The polishing of step 4, crystal
The polishing is polished using four axis polishing grinding machines of diamond micro mist.
As shown in Fig. 2, Sin (α in attached drawing1)/Sin(α2)=n wherein α1+α2=90 °, n indicates Cr:YAG laser crystal
Refractive index at 1064nm is 1.9169, and Nd can be calculated:The Brewster's angle α of YAG crystal1=63.2 °, such as Fig. 2 institutes
Show.
The principle of Brewster's angle laser crystal processing is as follows：
As shown in Figure 1, if meeting α when on the interface for projecting two kinds of different mediums of light beam1+α2=90 °
When, only smaller s polarised lights of light intensity in reflection light, without the p-polarization light that light intensity is larger, the at this moment reflected light in the plane of incidence
Line and refracted light are vertical, and incidence angle at this moment is called Brewster angle, also referred to as polarizing angle by we.
Brewster's angle is processed into two end faces of laser crystal, and ensures the depth of parallelism needed, incident ray is entering
When firing area face is with brewster angle incidence, refracted light can be propagated along the direction for the side for being parallel to optical element, another
End face is refracted into air dielectric by the reversed of same Brewster's angle, and such incident ray passes through Nd:After YAG crystal,
Emergent ray is parallel with incident ray, reaches the processing effect of common laser crystal.
Claims (2)
1. a kind of processing Nd using Brewster's angle:The method of YAG laser crystal, it is characterised in that：It carries out in accordance with the following steps：
The sorting of step 1, crystal
The sorting, using the visible scattering point of He-Ne laser irradiation naked eyes；
Step 2, the orientation of crystal
The orientation, using X-ray direction finder；The crystal-cut, using X-ray direction finder；
The cutting of step 3, crystal
Brewster's angle is processed into, and ensure in two end faces of laser crystal by the crystal-cut using X-ray direction finder
The depth of parallelism, Cr:Refractive index of the YAG laser crystal at 1064nm is 1.9169, and Nd can be calculated:The cloth scholar of YAG crystal this
Special angle α1=63.2.
The polishing of step 4, crystal
The polishing is polished using four axis polishing grinding machines of diamond micro mist.
2. according to claim 1 process Nd using Brewster's angle:The method of YAG laser crystal, it is characterised in that：Institute
The Brewster's angle of the cutting for the crystal stated, for incident ray when incident interface is with brewster angle incidence, refracted light can
To be propagated along the direction for the side for being parallel to optical element, it is refracted by the reversed of same Brewster's angle in other end
Air dielectric, such incident ray pass through Nd:After YAG crystal, emergent ray is parallel with incident ray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810347595.6A CN108565666A (en) | 2018-04-18 | 2018-04-18 | Nd is processed using Brewster's angle:The method of YAG laser crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810347595.6A CN108565666A (en) | 2018-04-18 | 2018-04-18 | Nd is processed using Brewster's angle:The method of YAG laser crystal |
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| Publication Number | Publication Date |
|---|---|
| CN108565666A true CN108565666A (en) | 2018-09-21 |
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ID=63535353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810347595.6A Pending CN108565666A (en) | 2018-04-18 | 2018-04-18 | Nd is processed using Brewster's angle:The method of YAG laser crystal |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276126A (en) * | 2008-04-23 | 2008-10-01 | 清华大学 | Double Brewster's angle nonlinear optical crystal and cutting method thereof |
| CN103182750A (en) * | 2011-12-29 | 2013-07-03 | 北京有色金属研究总院 | Method for processing reference surface by adopting linear cutting of gallium arsenide monocrystal |
-
2018
- 2018-04-18 CN CN201810347595.6A patent/CN108565666A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101276126A (en) * | 2008-04-23 | 2008-10-01 | 清华大学 | Double Brewster's angle nonlinear optical crystal and cutting method thereof |
| CN103182750A (en) * | 2011-12-29 | 2013-07-03 | 北京有色金属研究总院 | Method for processing reference surface by adopting linear cutting of gallium arsenide monocrystal |
Non-Patent Citations (2)
| Title |
|---|
| 李修 等: ""用于紫外倍频的CLBO晶体最佳切割方式研究"", 《光电技术应用》 * |
| 查立豫，林鸿海编著: "《光学零件工艺学》", 31 July 1987, 兵器工业出版社 * |
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Application publication date: 20180921 |
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