CN1601832A - Cat's eye chamber helium neon laser - Google Patents
Cat's eye chamber helium neon laser Download PDFInfo
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- CN1601832A CN1601832A CN 200410009696 CN200410009696A CN1601832A CN 1601832 A CN1601832 A CN 1601832A CN 200410009696 CN200410009696 CN 200410009696 CN 200410009696 A CN200410009696 A CN 200410009696A CN 1601832 A CN1601832 A CN 1601832A
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- chamber
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- eye reflector
- concave mirror
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- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 241000282326 Felis catus Species 0.000 claims abstract description 69
- 239000011022 opal Substances 0.000 claims description 35
- 238000001514 detection method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
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Abstract
The invention includes discharge tube of helium-neon laser and two cavity mirrors setup at two ends of the discharge tube. Technical features are that cats eye reversal unit is adopted for one or to cavity mirrors. The cats eye reversal unit is composed of one convex lens or composed of lens group and a concave mirror. Vertex of convex lens is placed within focal length of lens group or at focus. The invention overcomes disadvantages of difficult to be adjusted and to ensure stability, and large temperature drift. Transverse modes of output laser light can be selected in order to output base transverse mode. Under large gain, free of adjustment is possible. The invention also discloses dedicated device for testing cats eye reversal unit.
Description
Technical field
The present invention relates to a kind of laser, particularly a kind of helium neon laser belongs to the LASER Light Source technical field.
Background technology
The resonant cavity of existing helium neon laser all is made up of level crossing or concave mirror, and most typical have average chamber, flat-concave cavity and a concavo-concave chamber.These present several laserresonators have several shortcomings that are difficult to overcome: one. theoretically, make the laser ideal operation, need be transferred to two chamber mirrors forming resonant cavity parallelly fully, but be impossible realize in the reality, so the adjusting of laser just becomes a difficult job.Two. at the more abominable industrial circle of many environment, when laser is disturbed, thereby the collimation of two chamber mirrors can be affected and makes laser output power reduce a lot even cause laser to work.Three. when ambient temperature changed, the length of laser also can slowly be wriggled and the off resonance that brings resonant cavity, thereby causes the drift of laser output power and the angle drift of beam direction.More than three factors limited the especially application of half exocoel and full external cavity helium neon laser of helium neon laser greatly, make it can't use in the abominable place of many environment.
The structure of cat ' s eye reflector has multiple, and some application were once arranged in optical field at present.For example use cat ' s eye reflector to replace right-angle prism in some interferometer system, but they are as an outer speculum of laser, have or not this reverse device not influence the work of laser itself; Russia researcher S.A.Dimakov once was applied in CO to cat ' s eye reflector
2Field of lasers (is seen paper: Dimakov S.A, Kliment ' ev S.I, Khloponina V, " Cavity witha cat ' s-eye reflector based on elements of conical optics " 2002 Journal ofOptical Technolocy 69 536), but because CO
2Laser output power is higher, and the laser spot that forms on the concave mirror at cat ' s eye reflector rear portion is damaged the rete that is plated easily, thus have to use complicated circular cone optics to solve this problem, and also the structure of opal also has the variation of essence; France researcher B.Fermigie once used cat ' s eye reflector (to see paper: B.Fermigier in the semiconductor laser the inside, G.Lucas-Leclin, J.Dupont, F.Plumelle, M.Houssin, " Self-aligned external-cavity semiconductor lasers forhigh resolution spectroscopy; " but the structure more complicated 1998 Optics Communications 153,73),, and used post lens and grating, processing cost is very high.
Chinese patent application (application number: 200310115540.6) disclose a kind of " making the displacement self-sensing HeNe Optical Maser System of chamber mirror with opal ", this system is a displacement transducer, in the laser of half exocoel, used cat ' s eye reflector, compare level crossing or concave mirror increases on stability, but cat ' s eye reflector is a moving component as the displacement transducer the inside, be connected with testee mobile continuously with motion guide rail, thereby opal can constantly rock and make the laser power shakiness in the moving process, and laser output has time of 1/4th not have laser output, can't be used as LASER Light Source.
Summary of the invention
The present invention is intended to utilize the reverse reflected in parallel of cat ' s eye reflector, the technological deficiency that overcome that existing He-Ne Lasers light source is difficult to regulate, stability is difficult to guarantee, temperature drift is bigger is invented a kind of easy adjusting, high stable, the less opal He-Ne Lasers light source of temperature drift.
Technical scheme of the present invention is as follows:
A kind of opal chamber helium neon laser contains He-Ne Lasers discharge tube and two chamber mirrors that are arranged on the discharge tube two ends, and described laser is full outer-cavity structure, it is characterized in that: one or two in described two chamber mirrors adopts cat ' s eye reflector; Described cat ' s eye reflector is made up of convex lens or set of lenses and a concave mirror, and described concave mirror summit places within the focal length of convex lens or set of lenses or the focus place.
Another kind of opal provided by the invention chamber helium neon laser, contain He-Ne Lasers discharge tube and two chamber mirrors that are arranged on the discharge tube two ends, described laser is half outer-cavity structure, it is characterized in that: have only one to adopt cat ' s eye reflector in described two chamber mirrors, another adopts traditional chamber mirror, and this tradition chamber direct sealing-in of mirror is on laser tube; Or described two chamber mirrors all adopt cat ' s eye reflector, and one of them direct sealing-in is on laser tube; Described cat ' s eye reflector is made up of convex lens or set of lenses and a concave mirror, and described concave mirror summit places within the focal length of convex lens or set of lenses or the focus place.
Another opal chamber helium neon laser provided by the invention, contain He-Ne Lasers discharge tube and two chamber mirrors that are arranged on the discharge tube two ends, described laser is full inner-cavity structure, it is characterized in that: have one to adopt cat ' s eye reflector in described two chamber mirrors, another adopts traditional chamber mirror, and all direct sealing-in of described two chamber mirrors is on laser tube; Or described two chamber mirrors all adopt cat ' s eye reflector, and all directly sealing-in on laser tube; Described cat ' s eye reflector is made up of convex lens or set of lenses and a concave mirror, and described concave mirror summit places within the focal length of convex lens or set of lenses or the focus place.
The present invention also provides the special detection device of the cat ' s eye reflector that uses in the helium neon laser of a kind of described opal chamber, it is characterized in that: it is characterized in that: this device comprises the He-Ne Lasers light source, be arranged in the emitting light path and with light path in angle of 45 degrees semi-transparent semi-reflecting lens and be arranged on reception flat board in the semi-transparent semi-reflecting lens reflected light path, in the semi-transparent semi-reflecting lens transmitted light path, place cat ' s eye reflector.
Cat ' s eye reflector has good reverse reflected in parallel, still can be along the parallel ejaculation of former direction when a branch of directional light is mapped to cat ' s eye reflector so that smaller angle is oblique.The present invention is applied in cat ' s eye reflector in the laserresonator as the chamber mirror, when laser is disturbed when making cat ' s eye reflector do small rocking, this good reverse reflected in parallel can guarantee not off resonance of resonant cavity and still stable concussion, has improved the stability of laser greatly.Thereby make that opal chamber helium neon laser is easy to adjust, stable performance is on the bigger laser of gain even can realize exempting from transferring.And the laser output power that is caused by variation of ambient temperature drift and angle drift also reduce greatly.In addition, the spacing of convex lens or set of lenses and concave mirror in the adjusting cat ' s eye reflector can be exported transverse mode to laser and select to guarantee fundamental transverse mode output, and this is traditional laser mirror, and promptly level crossing or concave mirror are not available.The cat ' s eye reflector that the present invention uses is simple in structure, and difficulty of processing is less.
Description of drawings
A kind of cat ' s eye reflector structural representation that Fig. 1 uses for opal of the present invention chamber helium neon laser.
The another kind of cat ' s eye reflector structural representation that Fig. 2 uses for opal of the present invention chamber helium neon laser.
Fig. 3 is the structural representation of full exocoel opal chamber helium neon laser embodiment.
Fig. 4 is the another kind of structural representation of full exocoel opal chamber helium neon laser embodiment.
Fig. 5 is the structural representation of half exocoel opal chamber helium neon laser.
Fig. 6 is the another kind of structural representation of half exocoel opal chamber helium neon laser embodiment.
Fig. 7 is a full inner chamber opal chamber helium neon laser structural representation.
Fig. 8 is the another kind of structural representation of full inner chamber opal chamber helium neon laser embodiment.
Fig. 9 is the structural representation of the special detection device of cat ' s eye reflector provided by the invention.
Embodiment
The present invention has listed the embodiment of six kinds of opal cavity lasers, below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
Fig. 1 is a kind of structural representation of cat ' s eye reflector, and this cat ' s eye reflector is to be made up of 1, one concave mirror of convex lens 2, and the summit of described concave mirror 2 is positioned within the focus place or focal length of convex lens 1.
Fig. 2 is another kind of cat ' s eye reflector structural representation, is made up of set of lenses 3 and a concave mirror 2 that two or more lens are formed, and the summit of concave mirror 2 is positioned within the focus place or focal length of set of lenses, and the effect of set of lenses is that disappearing image is poor.
Fig. 3 is the structural representation of full exocoel opal chamber helium neon laser embodiment.Be to make a chamber mirror with cat ' s eye reflector, with traditional chamber mirror is the opal chamber helium neon laser of level crossing or the concave mirror full outer-cavity structure of making another one chamber mirror, by helium-neon discharge tube 4, tradition chamber mirror is level crossing or concave mirror 5 and cat ' s eye reflector 8 compositions, and there is the gain tube window 6 and 7 of sealing-in at helium-neon discharge tube 4 two ends.
Fig. 4 is the another kind of structural representation of full exocoel opal chamber helium neon laser embodiment, it is the opal chamber helium neon laser of making the full outer-cavity structure of two chamber mirrors of cat ' s eye reflector, two cat ' s eye reflectors 8 by helium-neon discharge tube 4 and two ends are formed, make speculum for one in two cat ' s eye reflectors 8, plating total reflection film layer on the concave mirror at its rear portion, another does outgoing mirror, the reflective coating that plates on the concave mirror at rear portion guarantees certain output rating to the He-Ne Lasers wavelength, and there is the gain tube window 6 and 7 of sealing-in at helium-neon discharge tube 4 two ends.
Fig. 5 is the structural representation of half exocoel opal chamber helium neon laser, be to make a chamber mirror with cat ' s eye reflector, with traditional chamber mirror is the opal chamber helium neon laser of level crossing or concave mirror half outer-cavity structure of making another one chamber mirror, by helium-neon discharge tube 4, tradition chamber mirror is level crossing or concave mirror 5 and cat ' s eye reflector 8 compositions, and gain tube window 6 and mirror 5 sealing-ins of traditional chamber are at the laser tube two ends.
Fig. 6 is the another kind of structural representation of half exocoel opal chamber helium neon laser embodiment, it is the opal chamber helium neon laser of making half outer-cavity structure of two chamber mirrors of cat ' s eye reflector, form by helium-neon discharge tube 4 and two cat ' s eye reflectors 8, make speculum for one in two cat ' s eye reflectors 8, plating total reflection film layer on the concave mirror at its rear portion, another does outgoing mirror, the reflective coating that plates on the concave mirror at rear portion guarantees certain output rating to the He-Ne Lasers wavelength, and gain tube window 6 and cat ' s eye reflector 8 sealing-ins are at the laser gain pipe two ends.
Fig. 7 is a full inner chamber opal chamber helium neon laser structural representation, be to make a chamber mirror with cat ' s eye reflector, with traditional chamber mirror is the opal chamber helium neon laser of level crossing or the concave mirror full inner-cavity structure of making another one chamber mirror, by helium-neon discharge tube 4, tradition chamber mirror is that level crossing or concave mirror 5 and cat ' s eye reflector 8 are formed, traditional chamber mirror 5 and cat ' s eye reflector 8 all sealing-in at the laser gain pipe two ends.
Fig. 8 is the another kind of structural representation of full inner chamber opal chamber helium neon laser embodiment, it is the opal chamber helium neon laser of making half outer-cavity structure of two chamber mirrors of cat ' s eye reflector, form by He-Ne gain tube 4 and two cat ' s eye reflectors 8, make speculum for one in two cat ' s eye reflectors 8, plating total reflection film layer on the concave mirror at its rear portion, another does outgoing mirror, the reflective coating that plates on the concave mirror at rear portion guarantees certain output rating to the He-Ne Lasers wavelength, two cat ' s eye reflectors 8 all sealing-in at the laser tube two ends.
Fig. 9 is the structural representation of the special detection device of cat ' s eye reflector provided by the invention, and when the summit of the concave mirror in forming cat ' s eye reflector was placed on the focus place of convex lens or set of lenses, the reverse reflected in parallel of cat ' s eye reflector was best.So before cat ' s eye reflector is installed on the laser, must be through detecting.The invention provides a kind of device of special detection cat ' s eye reflector, this device comprises He-Ne Lasers light source 9, be arranged in the emitting light path and with light path in angle of 45 degrees semi-transparent semi-reflecting lens 10 and be arranged on reception flat board 11 in the semi-transparent semi-reflecting lens reflected light path, in semi-transparent semi-reflecting lens 10 transmitted light paths, place cat ' s eye reflector 8.
Laser incides cat ' s eye reflector 8 through semi-transparent semi-reflecting lens 10 after penetrating from He-Ne Lasers light source 9, reflects then through semi-transparent semi-reflecting lens 10 and reflexes to reception dull and stereotyped 11.When concave surface vertex point is positioned at the focus place of convex lens or set of lenses in the reverse device, arrive to receive dull and stereotyped 11 be a branch of directional light, the focus of this light at infinity, this is the optimum state of reverse device work; When the concave mirror summit is positioned within the focal length of convex lens or set of lenses, arrive receive dull and stereotyped 11 be a branch of diverging light; When the concave mirror summit is positioned at outside the focal length of convex lens or set of lenses, arrive receive dull and stereotyped 11 be a branch of light that converges.Just can judge by measuring the focal position that arrives the light that receives flat board 11 whether cat ' s eye reflector has adjusted to optimum state.
Claims (4)
1. an opal chamber helium neon laser contains He-Ne Lasers discharge tube and two chamber mirrors that are arranged on the discharge tube two ends, and described laser is full outer-cavity structure, it is characterized in that: one or two in described two chamber mirrors adopts cat ' s eye reflector; Described cat ' s eye reflector is made up of convex lens or set of lenses and a concave mirror, and described concave mirror summit places within the focal length of convex lens or set of lenses or the focus place.
2. opal chamber helium neon laser, contain He-Ne Lasers discharge tube and two chamber mirrors that are arranged on the discharge tube two ends, described laser is half outer-cavity structure, it is characterized in that: have one to adopt cat ' s eye reflector in described two chamber mirrors, another adopts traditional chamber mirror, and this tradition chamber direct sealing-in of mirror is on laser tube; Or described two chamber mirrors all adopt cat ' s eye reflector, and one of them direct sealing-in is on laser tube; Described cat ' s eye reflector is made up of convex lens or set of lenses and a concave mirror, and described concave mirror summit places within the focal length of convex lens or set of lenses or the focus place.
3. opal chamber helium neon laser, contain He-Ne Lasers discharge tube and two chamber mirrors that are arranged on the discharge tube two ends, described laser is full inner-cavity structure, it is characterized in that: have one to adopt cat ' s eye reflector in described two chamber mirrors, another adopts traditional chamber mirror, and all direct sealing-in of described two chamber mirrors is on laser tube; Or described two chamber mirrors all adopt cat ' s eye reflector, and all directly sealing-in on laser tube; Described cat ' s eye reflector is made up of convex lens or set of lenses and a concave mirror, and described concave mirror summit places within the focal length of convex lens or set of lenses or the focus place.
4. special detection device as the cat ' s eye reflector that uses in the opal chamber helium neon laser as described in the arbitrary claim of claim 1～3, it is characterized in that: this device comprises the He-Ne Lasers light source, be arranged in the emitting light path and with light path in angle of 45 degrees semi-transparent semi-reflecting lens and be arranged on reception flat board in the semi-transparent semi-reflecting lens reflected light path, in the semi-transparent semi-reflecting lens transmitted light path, place cat ' s eye reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100096960A CN1299407C (en) | 2004-10-22 | 2004-10-22 | Cat's eye chamber helium neon laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100096960A CN1299407C (en) | 2004-10-22 | 2004-10-22 | Cat's eye chamber helium neon laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1601832A true CN1601832A (en) | 2005-03-30 |
| CN1299407C CN1299407C (en) | 2007-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100096960A Expired - Fee Related CN1299407C (en) | 2004-10-22 | 2004-10-22 | Cat's eye chamber helium neon laser |
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| Country | Link |
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| CN (1) | CN1299407C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779784A (en) * | 2014-02-24 | 2014-05-07 | 南京派光信息技术有限公司 | Semiconductor laser unit for measuring Raman spectra |
| WO2015100717A1 (en) * | 2014-01-02 | 2015-07-09 | 清华大学 | Double-frequency laser with high stability |
| CN110429460A (en) * | 2019-07-24 | 2019-11-08 | 中国科学院上海光学精密机械研究所 | Laser oscillator based on telecentricity cat eye structure |
| CN110779689A (en) * | 2019-10-21 | 2020-02-11 | 华为技术有限公司 | Device and method for measuring thermal focal length of laser medium |
| CN112563871A (en) * | 2020-12-07 | 2021-03-26 | 哈尔滨工业大学 | Anti-interference and high-stability cavity emptying laser and installation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053386U (en) * | 1988-12-31 | 1990-02-21 | 清华大学 | He-ne dual-frequency laser with quartz crystal tuning |
| JPH0342887A (en) * | 1989-07-11 | 1991-02-25 | Nikon Corp | Laser resonator |
| JPH0766476A (en) * | 1993-08-26 | 1995-03-10 | Matsushita Electric Ind Co Ltd | Gas laser oscillator |
| JPH1168213A (en) * | 1997-08-26 | 1999-03-09 | Nippon Steel Corp | Q switch co2 laser device |
-
2004
- 2004-10-22 CN CNB2004100096960A patent/CN1299407C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015100717A1 (en) * | 2014-01-02 | 2015-07-09 | 清华大学 | Double-frequency laser with high stability |
| CN103779784A (en) * | 2014-02-24 | 2014-05-07 | 南京派光信息技术有限公司 | Semiconductor laser unit for measuring Raman spectra |
| CN110429460A (en) * | 2019-07-24 | 2019-11-08 | 中国科学院上海光学精密机械研究所 | Laser oscillator based on telecentricity cat eye structure |
| CN110779689A (en) * | 2019-10-21 | 2020-02-11 | 华为技术有限公司 | Device and method for measuring thermal focal length of laser medium |
| CN110779689B (en) * | 2019-10-21 | 2021-05-25 | 华为技术有限公司 | Device and method for measuring thermal focal length of laser medium |
| CN112563871A (en) * | 2020-12-07 | 2021-03-26 | 哈尔滨工业大学 | Anti-interference and high-stability cavity emptying laser and installation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1299407C (en) | 2007-02-07 |
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Granted publication date: 20070207 Termination date: 20101022 |