CN203760845U - External-cavity-type diode laser device used for seed light injection - Google Patents
External-cavity-type diode laser device used for seed light injection Download PDFInfo
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- CN203760845U CN203760845U CN201420072302.5U CN201420072302U CN203760845U CN 203760845 U CN203760845 U CN 203760845U CN 201420072302 U CN201420072302 U CN 201420072302U CN 203760845 U CN203760845 U CN 203760845U
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Abstract
The utility model provides an external-cavity-type diode laser device used for seed light injection. The external-cavity-type diode laser device comprises a pedestal, a laser diode, a collimating lens, a raster, a turning mirror and a Faraday isolator. The laser diode is installed on the pedestal. Light emitted by the laser diode is incident into the raster via the collimating lens. Direction of zero-order diffraction of the raster is changed via the turning mirror, and light is outputted via the Faraday isolator. The Faraday isolator is additionally arranged in the external-cavity-type diode laser device so that the diode laser device is effectively isolated from an external environment, the external-cavity-type diode laser device is not interfered by a downstream laser device when the external-cavity-type diode laser device works as a seed injection laser device, and the laser diode is prevented from being damaged by the returned stray light; besides, influence of external reflection light on the external-cavity-type diode laser device is effectively inhibited, stability of output wavelength of the external-cavity-type diode laser device is enhanced, and the service life of the laser diode is prolonged.
Description
Technical field
The utility model relates to and belongs to optical device field, relates in particular to a kind of external cavity diode laser injecting for seed light.
Background technology
External cavity diode laser is due to simple in structure, the advantage such as volume is small and exquisite, price is cheap, tunable wave length, laser rays width, usually, as seed injection laser, for example, for producing seed, downstream laser (optical parametric oscillator, neodymium doped yttrium aluminium garnet laser) injects laser.The seed laser injecting can reduce the starting of oscillation threshold value of downstream laser effectively, makes downstream laser realize Laser output Wavelength stabilized, narrow linewidth.But downstream laser structure complexity, is difficult to avoid some to result from the stray light of downstream laser, gets back to diode laser by multiple reflections.Because diode laser is very responsive for extraneous stray light, if the stray light reflecting from downstream laser a little less than, can make so the output wavelength of diode laser depart from preset value; If the stray light that downstream laser reflects is stronger, even will cause the permanent damage of laser diode.The existence of this problem, has limited the application of diode laser as seed injection laser greatly.
Utility model content
The problems referred to above that exist in order to overcome traditional external cavity diode laser, the utility model provides a kind of external cavity diode laser of effectively diode laser and external environment being isolated effectively.
The technical scheme that the utility model adopted is for achieving the above object: a kind of external cavity diode laser injecting for seed light, comprise base, laser diode, collimating lens, grating, turning mirror and faraday isolator, laser diode is installed on base, the optical propagation direction that laser diode sends is provided with collimating lens and grating, the luminous point of laser diode overlaps with the focus of collimating lens, the Zero-order diffractive direction of grating is provided with turning mirror, and turning mirror refract light direction is provided with faraday isolator.
In described base, be provided with for the temperature-control circuit by outside accurately control the temperature of base hygrosensor, freeze or heat element.
Described laser diode pin connects outside accurate continuous current source.
The isolation of described faraday isolator is greater than 30dB.
External cavity diode laser of the present utility model, in external cavity diode laser, add faraday isolator, effectively diode laser and external environment are isolated effectively, faraday isolator has allows the unidirectional function of passing through of laser, can effectively decay and return to from downstream light path the stray light coming, thereby resonant cavity and external environment are isolated mutually.When external cavity diode laser is worked as seed injection laser, be not subject to the interference of downstream laser, avoid the stray light that laser diode is returned to damage; Effectively suppress the impact of extraneous reverberation on external cavity diode laser, improved the stability of external cavity diode laser output wavelength, extended the useful life of laser diode.Whole design simultaneously has small and exquisite, integrated, practical feature.
Brief description of the drawings
Fig. 1 is the utility model external cavity diode laser structure principle chart.
Embodiment
The external cavity diode laser structure of injecting for seed light of the present utility model as shown in Figure 1, mainly comprise: base 1, laser diode 2, collimating lens 3, grating 4, turning mirror 5, faraday isolator 6, the end, hygrosensor is installed, freezes or heats element in 1, can accurately control the temperature of base by outside temperature-control circuit.On laser diode 2 installations and base 1, the light that laser diode 2 sends incides grating 4 by collimating lens 3, between laser diode 2 and grating 4, form laserresonator, laser results from resonant cavity, the light that laser diode 2 sends incides grating 4 by collimating lens 3, the Zero-order diffractive of grating 4 changes direction after by turning mirror, exports by faraday isolator 6.Laser diode 2 pins connect outside accurate continuous current source.The luminous point of laser diode 2 overlaps with the focus of collimating lens, therefore after by collimating lens, becomes collimated light beam.Using laser propagation direction as rotation axis, slowly rotate faraday isolator, make emitting laser intensity from faraday isolator reach maximum.In order to reach enough isolation effects, the isolation of faraday isolator should be greater than 30dB.Within above-mentioned parts are all integrated in a box, volume is about (the high x of wide x is long) 80mmx80mmx150mm, very practical, compact, is especially suitable as seed injection laser, injects laser for other lasers provide seed.
The utility model, add faraday isolator in external cavity diode laser, is isolated diode laser and external environment effectively effectively, makes external cavity diode laser especially be suitable as the seed injection laser of downstream laser.Faraday isolator has allows the unidirectional function of passing through of laser, can effectively decay and return to from downstream light path the stray light coming, thereby resonant cavity and external environment are isolated mutually.When external cavity diode laser is worked as seed injection laser, be not subject to the interference of downstream laser, avoid the stray light that laser diode is returned to damage.
Claims (4)
1. the external cavity diode laser injecting for seed light, it is characterized in that: comprise base (1), laser diode (2), collimating lens (3), grating (4), turning mirror (5) and faraday isolator (6), laser diode (2) is installed on base (1), the optical propagation direction that laser diode (2) sends is provided with collimating lens (3) and grating (4), the luminous point of laser diode (2) overlaps with the focus of collimating lens (3), the Zero-order diffractive direction of grating (4) is provided with turning mirror (5), turning mirror (5) refract light direction is provided with faraday isolator.
According to claim 1 a kind of for seed light inject external cavity diode laser, it is characterized in that: in described base (1), be provided with for the temperature-control circuit by outside accurately control the temperature of base hygrosensor, freeze or heat element.
3. a kind of external cavity diode laser injecting for seed light according to claim 1, is characterized in that: described laser diode (2) pin connects outside accurate continuous current source.
4. a kind of external cavity diode laser injecting for seed light according to claim 1, is characterized in that: the isolation of described faraday isolator is greater than 30dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420072302.5U CN203760845U (en) | 2014-02-20 | 2014-02-20 | External-cavity-type diode laser device used for seed light injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420072302.5U CN203760845U (en) | 2014-02-20 | 2014-02-20 | External-cavity-type diode laser device used for seed light injection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203760845U true CN203760845U (en) | 2014-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420072302.5U Expired - Fee Related CN203760845U (en) | 2014-02-20 | 2014-02-20 | External-cavity-type diode laser device used for seed light injection |
Country Status (1)
| Country | Link |
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| CN (1) | CN203760845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105323507A (en) * | 2015-11-24 | 2016-02-10 | 深圳奥比中光科技有限公司 | Image information processing device and laser module used therein |
-
2014
- 2014-02-20 CN CN201420072302.5U patent/CN203760845U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105323507A (en) * | 2015-11-24 | 2016-02-10 | 深圳奥比中光科技有限公司 | Image information processing device and laser module used therein |
| CN105323507B (en) * | 2015-11-24 | 2019-01-18 | 深圳奥比中光科技有限公司 | A kind of image information processing device and it is used for mode of laser group therein |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20190220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |