CN2676458Y - A laser with continuous blue light - Google Patents
A laser with continuous blue light Download PDFInfo
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- CN2676458Y CN2676458Y CN 200420003380 CN200420003380U CN2676458Y CN 2676458 Y CN2676458 Y CN 2676458Y CN 200420003380 CN200420003380 CN 200420003380 CN 200420003380 U CN200420003380 U CN 200420003380U CN 2676458 Y CN2676458 Y CN 2676458Y
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- laser
- blue light
- laserresonator
- beam shaping
- crystal
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Abstract
The utility model discloses a laser with continuous blue light, comprising a pumping source, a light beam shaping system, an optical coupling system, and a laser cavity. The laser cavity is a linear cavity type structure, comprising the input end mirror of the laser cavity, a laser gain medium, a double frequency crystal, and the output end mirror of the laser cavity. The light beam shaping system can proceed shaping to the incident light ray by adopting the refraction method principle; after being-shaped by the light beam shaping system, the pumping source light beam of the diode B a r can pass through the pumping laser crystal on the end surface of the optical coupling system, then the pumping source light beam of the diode B a r passes through the chamber double frequency, and the continuous blue light laser output with high power can be implemented. After being-shaped by using one diode light beam B a r, the laser with continuous blue light of the utility model can pass through the pumping on the end surface of the efficient optical coupling system and can pass through the intra-cavity double frequency with the compact cavity type structure of the straight line; a specific film series design is adopted, and the continuous blue light laser output with the high power can be implemented. And thus the utility model has the advantages of compact conformation, high work efficiency, etc.
Description
Technical field
The utility model relates to a kind of laser aid, relates in particular to a kind of diode LD Bar beam shaping end-pumped all-solid-state intracavity frequency doubling contineous blue light laser.
Background technology
The blue laser value that has a wide range of applications in fields such as HIGH-DENSITY OPTICAL STORAGE, ultrashort pulse, digital video technology, spectral technique, laser medicines, wherein the high-power blue-light laser shows at laser large screen, has more crucial application prospect in ocean Military Application and the resource detection under water.At first diode pumping high-power blue-light laser can solidify ruddiness and green (light) laser formation three-primary colours lasing light emitter entirely with diode pumping, make this system have low in energy consumption, the life-span is long, efficient is high, the characteristics of good beam quality, its colourity more approaches natural daylight, thereby has effectively realized the balance of three-primary colours.In addition because the blue green light wavelength is in the low loss window of seawater, so the high power blue green laser has become the important light source in ocean Military Application and the resource detection under water.For example, satellite or aircraft rely on atmosphere, air/seawater interface and seawater as the communication between optical channel realization and the deep water submarine by the bluish-green laser signal; And for example, the bluish-green laser device can be used for airborne laser underwater reconnaissance detection system, also can be installed in submarine, the removal of mines device, underwater robot etc. under water on the carrier, realize visiting under water dive, detecting a mine, the removal of mines, antisubmarine net are surveyed, submarine collision avoidance and resource detection under water etc.
Along with the develop rapidly and the industrialization of semiconductor laser, the research and development of the total solidifying laser device of diode pumping have also obtained substantial progress, and begin to realize industrialization.People are just using the total solidifying laser device of this compact efficient now, utilize nonlinear material to develop various types of blue lasers, the wherein the most effective blue laser that surely belongs to intracavity frequency doubling by frequency multiplication or with method frequently.And must pass through collimation, shaping, focus in the laser crystal as the pumping source LD Bar light beam of above-mentioned blue laser.Because the structure of laser diode makes the focusing performance of its light beam on both direction differ greatly.Adopt the method (as so-called " trapezoidal mirror " method) of two steps reflection at present mostly, the linear beam after the collimation is cut into more piece, rearrange, to reach the purpose of improving its focusing performance.The method of above-mentioned two steps reflection, complex structure is unfavorable for miniaturization and modularization on the one hand; On the other hand, because some light energies are all lost in reflection each time, cause efficient after the shaping to be subjected to the restriction that can't overcome.
The utility model content
At the problem that prior art exists, the purpose of this utility model provides a kind of new type of continuous blue laser, and this laser utilizes refraction principle that pump light is carried out shaping and focuses on, and makes compact conformation, modularization on the one hand; On the other hand, because utilization is the refraction of light beam, do not relate to reflection, efficient can be greatly improved.
For achieving the above object, a kind of contineous blue light laser of the utility model comprises pumping source, beam shaping system, optical coupling system, laserresonator; Described laserresonator is the straight line cavity structure, comprises laserresonator input end mirror, gain medium, frequency-doubling crystal, laserresonator output end mirror; Described beam shaping system adopts the refraction process principle that the light of incident is carried out shaping; Diode Bar pumping source light beam by optical coupling system end pumped laser crystal, again through the laserresonator intracavity frequency doubling, is realized the output of high power contineous blue light laser after the shaping of beam shaping system.
Further, described pumping source can be a LD Bar semiconductor laser for pumping source, can also be LD Bar optical fiber coupling semiconductor laser for pumping source, can also be LD single tube laser pump source.
Further, described beam shaping system is made by a monoblock transparent medium, is processed with the multilayer plane of incidence and exit facet on this transparent medium, can be parallel between every layer of plane of incidence and its exit facet, also can be non-parallel, as bending.
Further, described beam shaping system is a multi-layer transparent medium block, and this multi-layer transparent medium block is formed by appropriate tilt angle mutual superposition by right quantity, transparent dielectric slab with suitable thickness.
Further, described beam shaping system is made of at least two vertical mutually multi-layer transparent medium blocks of placing, realize respectively the rearrangement of incident ray on two mutual vertical direction by this two multi-layer transparents medium block, be beam shaping, described multi-layer transparent medium block is formed by appropriate tilt angle mutual superposition by right quantity and transparent dielectric slab with suitable thickness.
Further, described laserresonator adopts Nd class (Nd:YAG, Nd:YVO
4, Nd:GdVO
4) laser crystal is as its gain medium, utilize laser crystal can
4F
3/2-
4I
9/2Energy level transition realizes laser operation.
Further, described frequency-doubling crystal employing LBO (or BBO, BiBO KNbO3) waits nonlinear crystal, frequency-doubling crystal both ends of the surface plating anti-reflection film.
Further, described laserresonator is imported end mirror for directly to make behind plated film on described gain medium pumping end surface, and laserresonator input end mirror and gain medium are integrated, and the other end of gain medium is coated with anti-reflection film.
Further, can be placed with other modeling element that is used for the control beam quality in the described laserresonator.
After the utility model contineous blue light laser uses a diode Bar beam shaping, by efficient optical coupling system end pumping, by intracavity frequency doubling, with compact straight line cavity structure, the special film of employing is design, realize the output of high power contineous blue light laser, thereby have advantages such as compact conformation, operating efficiency height.
The utility model passes through the design to the rational film of resonator mirror system, promptly by special plated film the film system of resonant cavity is met specific requirement, the feasible high laser transition wavelength that gains (
4F
3/2-
4I
11/2With
4F
3/2-
4I1
3/2) high transmitance is arranged thereby high loss is arranged, thereby be suppressed not starting of oscillation, and the laser transition wavelength that gains low (
4F
3/2-
4I
9/2) low transmitance is arranged thereby lower loss is arranged, obtain effectively thereby make it produce vibration
4F
3/2-
4I
9/2Laser operation, and then by the output of frequency multiplication realization high power contineous blue light.
Description of drawings
Fig. 1 is the structural representation of the utility model contineous blue light laser;
Fig. 2 realizes the basic principle figure that light beam moves for refraction process;
Fig. 3 utilizes two multilayer dielectricity sheet functional modules of refraction process to realize the example figure of beam shaping;
Fig. 4 utilizes refraction process to use a multilayer dielectricity sheet functional module to realize the example figure of beam shaping;
Fig. 5 utilizes refraction process to use a block functional module to realize the example figure of beam shaping.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Figure 1 shows that diode Bar direct end pumping behind beam shaping injects the air-cooled intracavity frequency doubling contineous blue light laser of Nd:YAG, diode pump source 1 is 40 watts of LD Bar, its operation wavelength is 808nm, through 2 shapings of beam shaping system, about 300 * 300 μ m of spot size after optical coupling system 3 focuses on again; The Nd:YAG crystal that gain medium 5 mixes for 1.0at.%, it is of a size of Φ 3 * 3mm
3, gain medium is by TEC conduction cooling, and its temperature is controlled at 17 ℃, directly plated film is imported end mirror 4 as laserresonator on the pumping end surface of gain medium 5, desirable R＞the 99.8%@946nm of filming parameter, T=88%@808nm, T=60%@1.06 μ m﹠amp; 1.32 μ m, the other end of gain medium 5 is to 946nm and 1.06 μ m﹠amp; 1.32 μ m plates anti-reflection film, places LBO frequency-doubling crystal 6 in the laser cavity, two end face is of a size of 3 * 3 * 15mm to 946nm and 473nm plating anti-reflection film
3, cut by I class phase matched mode, the desirable Θ of cutting parameter=90 °, Φ=19.37 °, temperature is controlled at 22 ± 0.1 ℃; Laserresonator output end mirror 7 is that radius of curvature is the plano-concave mirror of 100mm, and its plated film situation is R＞99.8%@946nm, T=85%@473nm.
Can obtain the frequency multiplication 473nm contineous blue light laser output that power reaches 500mW with said apparatus.
Figure 2 shows that the basic principle figure that refraction process realization light beam moves.
According to refraction principle, light beam incides in the transparent medium (as glass etc.) with certain angle, and direction will change.If this medium is parallel medium, it is constant that light beam passes the direction of propagation, back, but the position will be moved in the plane of incidence, as shown in FIG..Different amount of movements can be controlled by different incidence angles and medium length, that is: d=Lsin α [1-cos α/(n
2-sin
2α)
1/2], wherein, d is an amount of movement, and n is the refractive index of medium, and α is an incidence angle, and L is the length of medium.When α was negative, the expression medium tilted to another direction, and amount of movement at this moment is a negative, shows to another direction to move.This shows, change the amount of movement of light beam, can under the constant situation of medium length, change incidence angle, also can certain be not to use different medium lengths under 0 the incidence angle, or both combinations.
At different requirements, use the multilayer optical sheet glass of the different numbers of plies, every thickness is corresponding to the length of every joint light beam.According to the needed amount of movement of every joint light beam, determine the different angle of every sheet glass sheet.Such sheet glass module is a functional module, can realize the light beam rearrangement at least one direction.Concrete scheme is as follows:
(1) as shown in Figure 3, utilize an above-mentioned functional module (12) at first to realize a rearrangement on the direction, utilize second vertical module (13) of placing to carry out rearrangement on another direction, like this, the linear beam of the diode laser behind the collimation (11) is shaped as the distribution (14) that focusing performance improves greatly; Concrete design example is as follows: for example the length of linear beam is 20mm, and this linear beam is divided into five joints, is arranged in the distribution of 4mm * 4mm.5 joint light beams amount of movements in one direction be designed to respectively 2mm, 1mm, 0mm ,-1mm and-2mm, the amount of movement on another direction be designed to respectively 8mm, 4mm, 0mm ,-4mm and-8mm.If reset to realize with two steps, suppose that first functional module uses the sheet glass of 10mm, then needing thickness is 5 of the sheet glass of 5mm, required inclination angle is respectively 30.7 °, 16.6 °, 0 ° ,-16.6 ° and-30.7 °.Realize resetting for the second time, in second functional module, the thickness that needs the sheet glass that use is 5 of the sheet glass of 40mm as 1mm, length, and the inclination angle of each sheet is identical with the first time, is respectively 30.7 °, 16.6 °, 0 ° ,-16.6 ° and-30.7 °.The refractive index of the dielectric material that hypothesis is used in the above-mentioned design example is 1.5, i.e. the refractive index of general glass.
(2) Figure 4 shows that a tilted-putted functional module.The relative position of module and linear beam is tilted, can realize the rearrangement on the both direction simultaneously, like this, only need a multilayer dielectricity sheet functional module, just can be shaped as the distribution (14) that focusing performance improves greatly to the linear beam (11) of the diode laser behind the collimation.Certainly, the number of plies of sheet glass, every layer thickness, angle need redesign;
(3) Figure 5 shows that an integral module, form that the multilayer plane of incidence is processed in design as required by a monoblock transparent medium such as glass.Every layer of plane of incidence is parallel with exit facet, and every layer inclination angle is identical with the angle of inclination of corresponding dieelctric sheet shown in Figure 4, can realize the shaping feature same with functional module shown in Figure 4 like this.Compare with multilayer dielectricity sheet functional module shown in Figure 4, block functional module shown in Figure 5 structurally has tangible advantage: (1) is easy to be many on technology such as plating (anti-reflection) film etc.; (2) multilayer dielectricity sheet functional module shown in Figure 4 must tilt to place in use by design load, installs and regulates inconvenience; And block module shown in Figure 5 no longer needs the inclination angle of adjustment module because whole angle of inclination adds at processing module and processed man-hour during installation, and it is extremely convenient to use.
Claims (9)
1. a contineous blue light laser is characterized in that, comprises beam shaping system, optical coupling system, laserresonator; Described laserresonator is the straight line cavity structure, comprises laserresonator input end mirror, gain medium, frequency-doubling crystal, laserresonator output end mirror; Described beam shaping system adopts the refraction process principle that the light of incident is carried out shaping; Diode Bar pumping source light beam by optical coupling system end pumped laser crystal, again through the laserresonator intracavity frequency doubling, is realized the output of high power contineous blue light laser after the shaping of beam shaping system.
2. contineous blue light laser as claimed in claim 1 is characterized in that, described pumping source can be a LD Bar semiconductor laser for pumping source, can also be LD Bar optical fiber coupling semiconductor laser for pumping source, can also be LD single tube laser pump source.
3. contineous blue light laser as claimed in claim 2, it is characterized in that, described beam shaping system is made by a monoblock transparent medium, be processed with the multilayer plane of incidence and exit facet on this transparent medium, between every layer of plane of incidence and its exit facet can be parallel, also can be non-parallel, as bending.
4. contineous blue light laser as claimed in claim 2, it is characterized in that, described beam shaping system is a multi-layer transparent medium block, and this multi-layer transparent medium block is formed by appropriate tilt angle mutual superposition by right quantity, transparent dielectric slab with suitable thickness.
5. contineous blue light laser as claimed in claim 2, it is characterized in that, described beam shaping system is made of at least two vertical mutually multi-layer transparent medium blocks of placing, realize respectively the rearrangement of incident ray on two mutual vertical direction by this two multi-layer transparents medium block, be beam shaping, described multi-layer transparent medium block is formed by appropriate tilt angle mutual superposition by right quantity and transparent dielectric slab with suitable thickness.
6. as claim 1,2,3,4,5 arbitrary described contineous blue light lasers, it is characterized in that described laserresonator adopts Nd class (Nd: YAG, Nd: YVO
4, Nd: GdVO
4) laser crystal is as its gain medium, utilize laser crystal can
4F
3/2-
4I
9/2Energy level transition realizes laser operation.
7. contineous blue light laser as claimed in claim 6 is characterized in that, described frequency-doubling crystal employing LBO (or BBO, BiBO KNbO3) waits nonlinear crystal, frequency-doubling crystal both ends of the surface plating anti-reflection film.
8. contineous blue light laser as claimed in claim 7, it is characterized in that, described laserresonator input end mirror is for directly to make behind plated film on described gain medium pumping end surface, and laserresonator input end mirror and gain medium are integrated, the other end of gain medium is coated with anti-reflection film.
9. contineous blue light laser as claimed in claim 8 is characterized in that, is placed with other modeling element that is used for the control beam quality in the described laserresonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420003380 CN2676458Y (en) | 2004-02-06 | 2004-02-06 | A laser with continuous blue light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420003380 CN2676458Y (en) | 2004-02-06 | 2004-02-06 | A laser with continuous blue light |
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| Publication Number | Publication Date |
|---|---|
| CN2676458Y true CN2676458Y (en) | 2005-02-02 |
Family
ID=34482369
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420003380 Expired - Fee Related CN2676458Y (en) | 2004-02-06 | 2004-02-06 | A laser with continuous blue light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2676458Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399983C (en) * | 2006-09-06 | 2008-07-09 | 哈尔滨工业大学 | Light dynamical diagnosis instrument based on photosensitizer ALA |
| CN112260052A (en) * | 2020-10-19 | 2021-01-22 | 江苏师范大学 | Sunlight pumping solid laser with high-efficiency laser compensation capability |
-
2004
- 2004-02-06 CN CN 200420003380 patent/CN2676458Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399983C (en) * | 2006-09-06 | 2008-07-09 | 哈尔滨工业大学 | Light dynamical diagnosis instrument based on photosensitizer ALA |
| CN112260052A (en) * | 2020-10-19 | 2021-01-22 | 江苏师范大学 | Sunlight pumping solid laser with high-efficiency laser compensation capability |
| CN112260052B (en) * | 2020-10-19 | 2024-01-26 | 江苏师范大学 | Solar light pumping solid laser with efficient laser compensation capability |
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| 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 |