CN201781186U - Solid laser capable of outputting laser with high polarization ratio - Google Patents
Solid laser capable of outputting laser with high polarization ratio Download PDFInfo
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- CN201781186U CN201781186U CN2009201817546U CN200920181754U CN201781186U CN 201781186 U CN201781186 U CN 201781186U CN 2009201817546 U CN2009201817546 U CN 2009201817546U CN 200920181754 U CN200920181754 U CN 200920181754U CN 201781186 U CN201781186 U CN 201781186U
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Abstract
The utility model relates to the manufacture of a solid laser capable of outputting the laser with high polarization ratio. The outer surface of a laser gain medium and the inner surface of an optical output cavity mirror are respectively plated with an optical medium film to form a resonant cavity mirror; a 1/4 wave plate is arranged on a bracket which can freely rotate by taking the light-passing direction as the axes out of the optical output cavity mirror; and the two light-passing end faces of the 1/4 wave plate are plated with an antireflection film which corresponds to the output wave length of the used laser. Due to the structure, the solid laser can output the laser which has different polarization states and is converted into the line partial laser with high polarization ratio by the 1/4 wave plate arranged at the corresponding angle, and is compact in structure, small in loss, low in cost, and better for realizing the large batch production.
Description
Technical field
The utility model relates to a kind of solid state laser of High Extinction Ratio polarization output, belongs to affiliated technology of a kind of solid state laser and wave plate application technology field.
Technical background
Solid state laser has advantages such as conversion efficiency height, compact conformation, life-span length, has a wide range of applications in various fields such as laser indication, laser display, laser printing, laser medicine, subsurface communication, optical disc, airport navigation; The laser of high polarizability is even more important to specific areas such as laser display, subsurface communication, optical discs.
A kind of typical laser is as shown in Figure 1: the ellipse-shaped light that laser pumping source among the figure (1) sends is compressed shaping by collimation focus lens group (2 and 3) to light and is reentered and be mapped in the gain medium (4), and gain medium (4) can be laser crystals such as Nd:YVO4, Nd:YAG, Nd:GdVO4; The incident end face of gain medium (4) be coated with to pump light anti-reflection simultaneously to the chamber in fundamental frequency light and the high anti-deielectric-coating (8) of frequency doubled light, on the concave surface of plano-concave optics outgoing mirror (6), then be coated with fundamental frequency light high anti-simultaneously to the anti-reflection deielectric-coating of frequency doubled light (9), two plated film end faces have been formed the plano-concave laserresonator makes the starting of oscillation in the chamber of fundamental frequency light, goes out frequency doubled light via frequency-doubling crystal (5) frequency multiplication again and exports from plano-concave optics output cavity mirror (6); Frequency-doubling crystal (5) can have the nonlinear crystalline material of frequency multiplication characteristic for KTP, LBO, BBO, BIBO or other.The characteristics of above-mentioned solid state laser are that compact conformation is simple, volume is little and cost of manufacture is low.But gain medium (4) is subjected to thermogenetic thermally induced birefringence during owing to some laser works, the initial polarizability of frequency doubled light is good, but because it is caused depolarization because of partial reflection enters gain medium (4) back by its birefringence effect, thereby reduced the output polarisation of light, caused that the polarization state of output laser under conditions such as different pump powers, different operating ambient temperature or different frequency-doubling crystal length is indefinite; Some laser is because of the character problem of gain medium (4) own, and output laser itself is exactly circular polarization.Obtain linearly polarized laser output, several method is arranged usually: add wave plate in the chamber, loss is big, the medium of identical transmitance, and the loss that is placed in the chamber is several times that are placed on outside the chamber; Plated film is the depolarization that reduces interior lines, chamber polarisation, can not play initiatively play a part inclined to one side; Add the polarizer such as Glan prism, polarizer etc., it is all very big to be placed on the inside and outside loss in chamber, seriously reduces output power of laser.
Summary of the invention
The purpose of this utility model is to provide a kind of solid state laser of high polarization specific output.For achieving the above object, the utility model adopts following structure: a kind of solid state laser of high polarization specific output, comprise laser pumping source, the collimation focus lens group, gain medium, frequency-doubling crystal, optics output cavity mirror and a slice quarter wave plate, wherein, the outer surface of described gain medium and optics output cavity mirror inner surface are coated with optical medium film respectively and form resonator mirror, it is on the support that rotates freely along optical direction that quarter wave plate is installed in the outer energy of optics output cavity mirror, and two logical light end faces of quarter wave plate all are coated with its corresponding anti-reflection film that uses the output wavelength of laser.
The incident end face of described gain medium is coated with pump light anti-reflection simultaneously to the high anti-deielectric-coating of fundamental frequency light and frequency doubled light in the chamber, be coated with fundamental frequency light highly anti-simultaneously to the anti-reflection deielectric-coating of frequency doubled light on optics output cavity mirror outgoing end face, two plated film end faces have been formed laserresonator.
Between described gain medium, frequency-doubling crystal, optics output cavity mirror can be fixing respectively, also can lead to methods such as optical contant, optical cement or in-depth optical cement overall fixed together.
It is interior as the intracavity frequency doubling crystal that described frequency-doubling crystal can be placed on laser cavity, also can be placed on outside the chamber as the cavity external frequency multiplication crystal.
Described optics output cavity mirror can be that average mirror and gain medium form average chamber, also can plano-concave mirror and gain medium formation flat-concave cavity.
Adopt said structure, if the laser of exporting in the former laser cavity is linear polarization, quarter wave plate on the runing rest rotates to its e axle or the o axle is consistent with the polarization direction being installed in, so Shu Chu laser or linearly polarized light; If the laser of exporting in the former laser cavity is circular polarization, the quarter wave plate that is installed on the runing rest is rotated to any position, the laser of output is linear polarization; If the laser of exporting in the former laser cavity is elliptical polarization, quarter wave plate on the runing rest rotates to its e axle or the o axle is consistent with principal axis of ellipse being installed in, and the laser of output also is linear polarization.No matter the polarizability that begins from laser cavity output laser how, behind the quarter wave plate of placing through specific corresponding angle, the laser of ejaculation all is the good linearly polarized light of extinction ratio, better thermal adaptability is arranged after adopting the zero level quarter wave plate.Than the design of other several raising output laser rays polarization ratios, this structure has littler insertion loss to output laser, regulate more flexibly, and wideer thermal adaptability, and compact conformation, cost is low, is more conducive to realize producing in enormous quantities.Laser described in the literary composition all is vertical quarter wave plate incident.
Description of drawings
Below in conjunction with accompanying drawing patent of the present invention is described further
Fig. 1 is a kind of typical solid laser structure schematic diagram;
Fig. 2 is the utility model laser structure schematic diagram;
The structural representation of Fig. 3 embodiment 1 of the present utility model;
The structural representation of Fig. 4 embodiment 2 of the present utility model;
The structural representation of Fig. 5 embodiment 3 of the present utility model.
Embodiment
As shown in Figure 2, the ellipse-shaped light that laser pumping source (1) sends is compressed shaping by collimation focus lens group (2 and 3) to light and is reentered and be mapped in the gain medium (4), and gain medium (4) can be laser crystals such as Nd:YVO4, Nd:YAG, Nd:GdVO4; The incident end face of gain medium (4) be coated with to pump light anti-reflection simultaneously to the chamber in fundamental frequency light and the high anti-deielectric-coating (8) of frequency doubled light, on the concave surface of plano-concave optics outgoing mirror (6), then be coated with fundamental frequency light high anti-simultaneously to the anti-reflection deielectric-coating of frequency doubled light (9), two plated film end faces have been formed the plano-concave laserresonator makes the starting of oscillation in the chamber of fundamental frequency light, goes out frequency doubled light via frequency-doubling crystal (5) frequency multiplication again and exports from plano-concave optics output cavity mirror (6); Frequency-doubling crystal (5) can have the nonlinear crystalline material of frequency multiplication characteristic for KTP, LBO, BBO, BIBO or other; Can be to separate to place to fix between gain medium (4), frequency-doubling crystal (5) and the plano-concave optics outgoing mirror (6), also can be cascaded them fixing with the mode of gummed, optical cement or in-depth optical cement; It is on the support that rotates freely along optical direction that quarter wave plate (7) is installed in the outer energy of plano-concave optics output cavity mirror (6), two logical light end faces of quarter wave plate (7) all are coated with the fundamental frequency light of laser generation and the anti-reflection film (10) of frequency doubled light, convert the extreme light output of line of high polarization ratio behind the quarter wave plate (7) of laser in different polarization states through the corresponding angle placement according to output to.
As shown in Figure 3, the ellipse-shaped light that laser pumping source (1) sends is compressed shaping by collimation focus lens group (2 and 3) to light and is reentered and be mapped in the microplate module, the microplate module by gain medium (4) and frequency-doubling crystal (5) by gummed, optical cement or deepen mode such as optical cement and be fixed together; Gain medium (4) can be laser crystals such as Nd:YVO4, Nd:YAG, Nd:GdVO4; The incident end face of gain medium (4) be coated with to pump light anti-reflection simultaneously to the chamber in fundamental frequency light and the high anti-deielectric-coating (8) of frequency doubled light, on the output end face of frequency-doubling crystal (5), then be coated with fundamental frequency light high anti-simultaneously to the anti-reflection deielectric-coating of frequency doubled light (9), two plated film end faces have been formed average laserresonator makes the starting of oscillation in the chamber of fundamental frequency light, goes out frequency doubled light from the output of frequency-doubling crystal (5) end via frequency-doubling crystal (5) frequency multiplication again; Frequency-doubling crystal (5) can have the nonlinear crystalline material of frequency multiplication characteristic for KTP, LBO, BBO, BIBO or other; It is on the support that rotates freely along optical direction that quarter wave plate (7) is installed in the outer energy of frequency-doubling crystal (5), two logical light end faces of quarter wave plate (7) all are coated with the fundamental frequency light of laser generation and the anti-reflection film (10) of frequency doubled light, convert the extreme light output of line of high polarization ratio behind the quarter wave plate (7) of laser in different polarization states through the corresponding angle placement according to output to.
As shown in Figure 4, the ellipse-shaped light that laser pumping source (1) sends is compressed shaping by collimation focus lens group (2 and 3) to light and is reentered and be mapped in the gain medium (4), and gain medium (4) can be laser crystals such as Nd:YVO4, Nd:YAG, Nd:GdVO4; The incident end face of gain medium (4) be coated with to pump light anti-reflection simultaneously to the chamber in fundamental frequency light and the high anti-deielectric-coating (8) of frequency doubled light, on the concave surface of plano-concave optics outgoing mirror (6), then be coated with fundamental frequency light high anti-simultaneously to the anti-reflection deielectric-coating of frequency doubled light (9), two plated film end faces have been formed the plano-concave laserresonator makes the starting of oscillation in the chamber of fundamental frequency light, goes out frequency doubled light via frequency-doubling crystal (5) frequency multiplication again and exports from plano-concave optics output cavity mirror (6); Frequency-doubling crystal (5) can have the nonlinear crystalline material of frequency multiplication characteristic for KTP, LBO, BBO, BIBO or other; Adjusting Q crystal (12) is placed between gain medium (4) and frequency-doubling crystal (5) or frequency-doubling crystal (5) and the plano-concave optics output cavity mirror (6), is coated with corresponding medium anti-reflection film on it; Can be to separate to place to fix between gain medium (4), frequency-doubling crystal (5), adjusting Q crystal (11) and the plano-concave optics outgoing mirror (6), also can be cascaded them fixing with the mode of gummed, optical cement or in-depth optical cement; It is on the support that rotates freely along optical direction that quarter wave plate (7) is installed in the outer energy of plano-concave optics output cavity mirror (6), two logical light end faces of quarter wave plate (7) all are coated with the fundamental frequency light of laser generation and the anti-reflection film (10) of frequency doubled light, convert the extreme light output of line of high polarization ratio behind the quarter wave plate (7) of laser in different polarization states through the corresponding angle placement according to output to.
As shown in Figure 5, the ellipse-shaped light that laser pumping source (1) sends is compressed shaping by collimation focus lens group (2 and 3) to light and is reentered and be mapped in the gain medium (4), and gain medium (4) can be laser crystals such as Nd:YVO4, Nd:YAG, Nd:GdVO4; The incident end face of gain medium (4) be coated with to pump light anti-reflection simultaneously to the chamber in fundamental frequency light and the high anti-deielectric-coating (8) of frequency doubled light, then be coated with fundamental frequency light highly anti-simultaneously to the anti-reflection deielectric-coating of frequency doubled light (9) on the concave surface of plano-concave optics outgoing mirror (6), two plated film end faces have been formed the plano-concave laserresonator; Frequency-doubling crystal (5) is placed on that the fundamental frequency light to output carries out frequency multiplication on the output laser optical path of the outer plano-concave optics output cavity mirror (6) of resonant cavity, and its two logical light end face is coated with the anti-reflection film of fundamental frequency light and frequency doubled light; Frequency-doubling crystal (5) can have the nonlinear crystalline material of frequency multiplication characteristic for KTP, LBO, BBO, BIBO or other; Can be to separate to place to fix between gain medium (4), plano-concave optics outgoing mirror (6) and the frequency-doubling crystal (5), also can be cascaded them fixing with the mode of gummed, optical cement or in-depth optical cement; It is on the support that rotates freely along optical direction that quarter wave plate (7) is installed in the outer energy of frequency-doubling crystal (5), two logical light end faces of quarter wave plate (7) all are coated with the fundamental frequency light of laser generation and the anti-reflection film (10) of frequency doubled light, convert the extreme light output of line of high polarization ratio behind the quarter wave plate (7) of laser in different polarization states through the corresponding angle placement according to output to.
Claims (5)
1. the solid state laser of a high polarization specific output, comprise laser pumping source (1), collimation focus lens group (2 and 3), gain medium (4), frequency-doubling crystal (5), optics output cavity mirror (6) and a slice quarter wave plate (7), it is characterized in that: the outer surface of described gain medium (4) and optics output cavity mirror (6) inner surface are coated with first optical medium film (8) respectively and second optical medium film (9) forms resonator mirror; It is on the support that rotates freely along optical direction that quarter wave plate (7) is installed in the outer energy of optics output cavity mirror (6); Two logical light end faces of quarter wave plate (7) all are coated with its corresponding anti-reflection film (10) that uses the output wavelength of laser.
2. the solid state laser of a kind of high polarization specific output according to claim 1 is characterized in that: described frequency-doubling crystal (5) can be placed in the laser cavity as the intracavity frequency doubling crystal or be placed on outside the chamber as the cavity external frequency multiplication crystal.
3. the solid state laser of a kind of high polarization specific output according to claim 1, it is characterized in that: the incident end face of described gain medium (4) is coated with pump light anti-reflection simultaneously to the high anti-deielectric-coating (8) of fundamental frequency light and frequency doubled light in the chamber, be coated with fundamental frequency light highly anti-simultaneously to the anti-reflection deielectric-coating of frequency doubled light (9) on optics output cavity mirror (6) outgoing end face, two plated film end faces have been formed laserresonator.
4. the solid state laser of a kind of high polarization specific output according to claim 1 is characterized in that: described optics output cavity mirror (6) can be that average mirror and gain medium (4) form average chamber or plano-concave mirror and gain medium (4) formation flat-concave cavity.
5. the solid state laser of a kind of high polarization specific output according to claim 1 is characterized in that: can be separate to place fixing or they are cascaded fixing with gummed, optical cement or the mode of deepening optical cement between described gain medium (4), frequency-doubling crystal (5) and the optics outgoing mirror (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201817546U CN201781186U (en) | 2009-12-21 | 2009-12-21 | Solid laser capable of outputting laser with high polarization ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201817546U CN201781186U (en) | 2009-12-21 | 2009-12-21 | Solid laser capable of outputting laser with high polarization ratio |
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| CN201781186U true CN201781186U (en) | 2011-03-30 |
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| CN2009201817546U Expired - Fee Related CN201781186U (en) | 2009-12-21 | 2009-12-21 | Solid laser capable of outputting laser with high polarization ratio |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037601A (en) * | 2014-06-13 | 2014-09-10 | 南京诺派激光技术有限公司 | Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device |
| CN109742646A (en) * | 2019-01-03 | 2019-05-10 | 华中科技大学 | A kind of device inhibiting the optical parametric oscillator relaxation oscillation of intracavity pump continuous wave |
| CN111478160A (en) * | 2020-05-06 | 2020-07-31 | 洛阳顶扬光电技术有限公司 | Method for effectively improving absorption efficiency of end-pump laser |
-
2009
- 2009-12-21 CN CN2009201817546U patent/CN201781186U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037601A (en) * | 2014-06-13 | 2014-09-10 | 南京诺派激光技术有限公司 | Adjustable saturable absorbing device, production method of adjustable saturable absorbing device and application of adjustable saturable absorbing device in time domain output mode adjustable optical fiber pulse laser device |
| CN109742646A (en) * | 2019-01-03 | 2019-05-10 | 华中科技大学 | A kind of device inhibiting the optical parametric oscillator relaxation oscillation of intracavity pump continuous wave |
| CN111478160A (en) * | 2020-05-06 | 2020-07-31 | 洛阳顶扬光电技术有限公司 | Method for effectively improving absorption efficiency of end-pump laser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20131221 |