CN1061786C - High power narrow line width regulatable laser - Google Patents
High power narrow line width regulatable laser Download PDFInfo
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- CN1061786C CN1061786C CN96114077A CN96114077A CN1061786C CN 1061786 C CN1061786 C CN 1061786C CN 96114077 A CN96114077 A CN 96114077A CN 96114077 A CN96114077 A CN 96114077A CN 1061786 C CN1061786 C CN 1061786C
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- laser
- grating
- mirror
- line width
- high power
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Abstract
The present invention relates to a tunable laser with high power and narrow line width, which comprises a laser gain medium 2 and a plane grating 3 or a grating combining device which is placed on one end of the laser gain medium 2; a cylindrical mirror 1 is placed on the other end of the laser gain medium 2, and the generating line of the cylindrical mirror is perpendicular to the marking line of the grating 3. The present invention can obtain narrow laser line width under the condition of high output laser power, and can be widely used for the technical fields of laser spectroscopy, optical pump infrared lasers, laser chemistry, pollution detection, optoelectronic countermeasure, etc.
Description
The invention belongs to laser, particularly a kind of tunable laser that adopts the high power narrow linewidth of cylindrical mirror and grating combination resonant cavity.
In the high power tunable laser, extensively the laserresonator that adopts is made up of spherical mirror and plane grating.Grating has the function that frequency is selected as a terminal reflector of resonant cavity.Change the angle (incidence angle) of the axle of grating normal and resonant cavity.Just can realize frequency tuning.In many practical applications, require the band width of laser output narrow as far as possible.Thereby the method that reduces live width normally strengthens the resolution that the size of grating improves grating, and this need increase beam expanding telescope or make the incidence angle of grating get the mounting means of nearly glancing incidence in laserresonator.Further the method for compression live width is to adopt two or more gratings, (Applied Optics, Vol.30, No.30, pp4319-4329) this makes Optical Maser System complicated, adjusts difficulty, and the laserresonator internal loss increases, and power output descends.In addition, the cost of laser also improves thereupon.
The objective of the invention is to propose a kind of tunable laser that adopts the high power narrow linewidth of cylindrical mirror and grating combination resonant cavity.
Main feature of the present invention is to have adopted the end mirror of cylindrical mirror as resonant cavity in the tuning laserresonator of grating.The bus of cylindrical mirror is vertical mutually with grating line.
The present invention adopts the tunable laser of cylindrical mirror-plane grating combination resonant cavity to have narrower laser linewidth under higher output laser power situation.This high power narrow line width regulatable laser can be used for fields such as laser spectroscopy, optical pumping infrared laser, laser chemistry, pollution detection and electrooptical countermeasures.
Description of drawings
Fig. 1 is a principle schematic of the present invention, and figure a is that plan view, b are front views
1 is that cylindrical mirror 2 is that laser gain medium 3 is plane gratings among the figure
Fig. 2 is one embodiment of the present of invention
4 is that convex mirror 5 is concave mirrors among the figure
Fig. 3 is an alternative embodiment of the invention
6 is level crossings among the figure
Known that by Fig. 1 grating is got Littrow mounting means (incidence angle α equals angle of diffraction β), the bus of cylindrical mirror 1 is vertical mutually with grating 3 grooves.Laser is from the cylindrical mirror output of part transmission, and rotating shutter can make laser frequency tuning.On the direction that grating rotates, promptly on the degree of freedom of frequency tuning, cylindrical mirror is equivalent to a level crossing, and this has just increased the frequency selectivity of grating tuned resonating cavity widely; And on another degree of freedom.Cylindrical mirror is equivalent to a spherical mirror, and its radius of curvature is long greater than the chamber, can make the enough low and collimation of the diffraction loss of laser easily.Therefore, laser of the present invention can be exported narrower laser linewidth and higher power.
Laser shown in Figure 2 has increased the beam expanding telescope of being made up of convex reflecting mirror 4 and concave mirror 5 in laserresonator.Cylindrical mirror 1 is to be the completely reflecting mirror that substrate is made by metal or other material of high thermal conductivity.High reflectance retes such as coating by vaporization gold or deielectric-coating can bear high laser power density in the laser cavity.Laser is by the zero level coupling output of grating.The area that beam expanding telescope in the chamber is mapped on the grating light beam increases.Because reality has been increased by the gratings strips number of light beam irradiates, so the resolution of grating also increases, this further narrows down the live width of output laser.
Its grating of laser shown in Figure 3 is mounted to the glancing incidence mode, and wherein incidence angle α is greater than angle of diffraction β.In order to form laser generation, increased a plane mirror 6, regulate plane mirror and make diffraction light finish the collimation of laser cavity from former direction return laser light chamber.Laser output is obtained from the grating zero level.Owing to also be suitable for producing high power narrow linewidth output with this laser of the similar reason of laser among Fig. 2.
Claims (5)
1. high power narrow line width regulatable laser, comprise laser gain medium (2), be placed on the plane grating (3) or the grating composite set of laser gain medium (2) one ends, it is characterized in that being placed with a cylindrical mirror (1) at the other end of laser gain medium (2), the bus of cylindrical mirror (1) is vertical mutually with the groove of grating (3).
2. by the described high power narrow line width regulatable laser of claim 1, it is characterized in that said cylindrical mirror is partially transmitting mirror or completely reflecting mirror.
3. by claim 1 or 2 described high power narrow line width regulatable lasers, it is characterized in that the radius of curvature of cylindrical mirror is long greater than the chamber.
4. by the described high power narrow line width regulatable laser of claim 1, it is characterized in that between laser gain medium (2) and grating (3), being placed with the beam expanding telescope of convex reflecting mirror (4) and concave mirror (5) composition.
5. by the described high power narrow line width regulatable laser of claim 1, it is characterized in that grating (3) is mounted to the glancing incidence mode, in order to form laser generation, increased a plane mirror (6), can make from described grating diffration light from former direction return laser light chamber by regulating plane mirror, finish the collimation of laser cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114077A CN1061786C (en) | 1996-12-27 | 1996-12-27 | High power narrow line width regulatable laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114077A CN1061786C (en) | 1996-12-27 | 1996-12-27 | High power narrow line width regulatable laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1158508A CN1158508A (en) | 1997-09-03 |
| CN1061786C true CN1061786C (en) | 2001-02-07 |
Family
ID=5121918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96114077A Expired - Fee Related CN1061786C (en) | 1996-12-27 | 1996-12-27 | High power narrow line width regulatable laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1061786C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064948B (en) * | 2013-03-22 | 2017-07-21 | 中国科学院大连化学物理研究所 | A kind of variable route selection stable resonator suitable for air-flow chemical laser |
| CN106911064B (en) * | 2015-12-22 | 2019-11-12 | 中国科学院大连化学物理研究所 | Phase compensation type rastering laser resonant cavity |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0472727A1 (en) * | 1989-05-18 | 1992-03-04 | Kabushiki Kaisha Komatsu Seisakusho | Narrow-band oscillation excimer laser |
-
1996
- 1996-12-27 CN CN96114077A patent/CN1061786C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0472727A1 (en) * | 1989-05-18 | 1992-03-04 | Kabushiki Kaisha Komatsu Seisakusho | Narrow-band oscillation excimer laser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1158508A (en) | 1997-09-03 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |