CN1644189A - Semiconductor laser alignment coupler - Google Patents
Semiconductor laser alignment coupler Download PDFInfo
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- CN1644189A CN1644189A CN 200510023470 CN200510023470A CN1644189A CN 1644189 A CN1644189 A CN 1644189A CN 200510023470 CN200510023470 CN 200510023470 CN 200510023470 A CN200510023470 A CN 200510023470A CN 1644189 A CN1644189 A CN 1644189A
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- semiconductor laser
- light
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- collimation
- coupled lens
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Abstract
A collimation coupler of semiconductor laser used in the photodynamic therapy of eyeground for coupling the therapeutic light and the indicating light into a single optical fibre to coaxially output is composed of base plate, heat radiator, multiple semiconductor lasers, multiple collimation lenses relative to said semiconductor lasers, multiple optical way commutating elements, coupling lens, and optical fibre connector. Its advantages are simple and compact structure and high optical coupling efficiency.
Description
Technical field
The present invention relates to laser alignment coupler, be particularly related to a kind of human eye optical fundus focus laser irradiation optical dynamic therapy that is used for, the semiconductor laser alignment coupler that the laser that noise spectra of semiconductor lasers (laser diode, abbreviation LD) is sent collimates and is coupled and exports.
Background technology
Photodynamic therapy (Photodynamic Therapy, abbreviation PDT) also is the photoirradiation therapy, and (Photoradiation Therapy PRT), is a kind of selective therapy new technique that becomes tissue at the blood vessel hyperplasia sexually transmitted disease (STD) of twentieth century appearance at the end of the seventies.This therapy is another the tumor new therapy in research and development just after operation, radiotherapy, chemotherapy and immunization therapy.Its ultimate principle is: after some certain drug (photosensitizer) enters in patient's body, can dynamically concentrate in cambiums such as tumor, the latter is under the irradiation of certain optical wavelength, light power sensitized reaction takes place and produce singlet oxygen (102) isoreactivity oxygen species with absorption medicine (photosensitizer), cause biomacromolecule photooxidation inactivation, and cause cells injury thus and cause death of neoplastic cells, the patient is cured.Photodynamic therapy is compared the distinct advantages with oneself with the tumor traditional remedies: (1) can optionally be eliminated partial former or recurrent tumor and not jeopardize normal structure; (2) can carry out and have to a certain degree synergism simultaneously with other tumor therapies; (3) toxicity is slight, and operation is not only convenient but also economical.Photodynamic therapy (PDT) nowadays also has been used to non-tumorous type treatment of diseases, as: treatment of diseases such as restenosis, psoriasis, nevus flammeus, rheumatoid arthritis after optical fundus maculopathy, the angioplasty.
Utilize the key factor of photodynamic therapy treatment to be the laser of photosensitizer and respective wavelength, wherein the laser that sends of laser instrument wants to be imported on request the lesions position of required treatment.At present, clinical ophthalmology laser therapy apparatus commonly used is by light-conductive optic fibre (or articulate arm) conduction laser.This just exists one how laser coupled to be advanced optical fiber, and improves the problem of its light energy coupling efficiency.For He-Ne, Ar
+, Kr
+The gas laser of class is because its bright dipping mostly is TEM
00Mould, hot spot circle quality is good, divergence is very little, so coupling just is easy to.But,,, increased the difficulty that improves coupling efficiency so what send is exactly an ellipse light spot because its light that sends is big a lot of than slow-axis direction of the divergence of quick shaft direction for semiconductor laser.In addition, a small-power indication laser is arranged in the ophthalmology laser therapeutic instrument, its effect is that utilization elder generation's this pilot light of unlatching before opening powerful treatment laser is found focus accurately, and this just requires pilot light and treat light preferably can be coupled in the light path, exports use to realize light path coaxial.
Summary of the invention
The object of the present invention is to provide a kind of semiconductor laser alignment coupler, be coupled into same optical fiber with the multi-path laser that semiconductor laser can be sent and realize coaxial output.
For achieving the above object, the invention provides a kind of semiconductor laser alignment coupler, its characteristics are to comprise base plate and are installed on heat abstractor on the base plate, a plurality of semiconductor lasers, with the corresponding collimation camera lens of semiconductor laser, a plurality of light path turnover elements, coupled lens, the optical fiber Connection Block, described a plurality of semiconductor laser sends multi-path laser, wherein one road laser converges the external optical fiber of incident by coupled lens behind corresponding collimation camera lens collimation, other each road laser is respectively behind corresponding collimation camera lens collimation, transfer from axle incident coupled lens through light path turnover element again, converge the external optical fiber of incident by coupled lens.
Described semiconductor laser comprises first, second semiconductor laser that is used to send treatment light and the 3rd semiconductor laser that is used to send pilot light, wherein the treatment light that sends of first semiconductor laser through collimating after directly through the external optical fiber of coupled lens incident.
The treatment light that second semiconductor laser sends behind collimation again through twice 90 ° of turnovers of two light paths turnovers element, from axle incident coupled lens; The pilot light that the 3rd semiconductor laser sends behind collimation again through 90 ° of turnovers of light path turnover element, from axle incident coupled lens.
Described light path turnover element is a corner cube prism.
The quick shaft direction of described semiconductor laser is all perpendicular to base plate.
Describedly be distributed in light path both sides from axle incident illumination compactness without the turnover of light path turnover element through the turnover of light path turnover element.
Described first, second semiconductor laser is close in parallel to each other and is installed on the heat abstractor, and scribbles heat-conducting silicone grease between heat abstractor, keeps suitable distance between this two-laser.
Described heat abstractor comprises fin and radiator fan, and wherein radiator fan is installed on the two ends of fin, and its air supply direction is consistent and parallel with the radiating groove direction of fin.
Described each collimation camera lens is fixed on the base plate by a collimation objective carrier, adopts the optical glass that is arranged at three highs index of refraction in the collimating lens tube to realize collimation.
Described coupled lens is located in the coupled lens lens barrel, is fixed on the base plate by the optical fiber Connection Block, and a termination of this coupled lens lens barrel is received the incident that semiconductor laser sends laser, and the other end is installed a standard fiber interface, is used to connect optical fiber.
Beneficial effect of the present invention:
1.. the multi-path laser that semiconductor laser is sent is coupled into same optical fiber well and realizes coaxial output;
2.. light channel structure novelty, compactness, succinct, optical element is few and economical;
3.. fin and radiator fan have guaranteed the good heat radiating and the operate as normal of high power semiconductor lasers;
4.. the coupling efficiency height reaches more than 95%;
5.. be used for the optical fundus optical dynamic therapy, then can be coupled into same fiber-coaxial output well with treating light and pilot light, the treatment luminous power satisfies optical fundus focus treatment requirement, and application is conveniently, accurately.
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is an index path of the present invention.
Among the figure:
1-base plate 2-heat abstractor
The 3-first semiconductor laser 4-second semiconductor laser
5-the 3rd semiconductor laser 6-collimates camera lens
The 7-first corner cube prism 8-second corner cube prism
9-the 3rd corner cube prism 10-coupled lens
11-optical fiber Connection Block 12-fin
13-radiator fan 14-collimating mirror headstock
The 15-first corner cube prism seat 16-second corner cube prism seat
17-coupled lens lens barrel 18-standard fiber interface
19-optical fiber 20-collimating lens tube
21,22,23-optical glass 24-screw
The specific embodiment
As shown in Figure 1, 2, semiconductor laser alignment coupler of the present invention, be used for the optical fundus optical dynamic therapy, comprise base plate 1 and be installed on heat abstractor 2 on the base plate 1, three semiconductor lasers 3,4,5, collimate camera lens 6, three light path turnover elements 7,8,9, coupled lens 10, optical fiber Connection Block 11 one to one with semiconductor laser 3,4,5.
Wherein heat abstractor 2 comprises high-power fin 12 and plug-type radiator fan 13, wherein radiator fan 13 is installed on the two ends of fin 12, its air supply direction is parallel with the radiating groove direction of fin 12, and forms push-and-pull to same direction, to strengthen radiating effect greatly.
First, second semiconductor laser the 3, the 4th in three semiconductor lasers 3,4,5 is used to send the high power semiconductor lasers for the treatment of light, it is close in parallel to each other and is installed on the fin 12, and 12 of fin scribble heat-conducting silicone grease, and 3,4 of two-lasers keep certain distance to avoid mutual conduction of heat influence.These first, second semiconductor laser 3,4 each self-corresponding collimation camera lenses 6 are arranged at its place ahead respectively, are fixed on the base plate 1 by a collimation objective carrier 14, leave certain space in order to ventilation and heat with 3,4 in corresponding laser instrument.First, second semiconductor laser 3,4 is treated the optical alignment light paths with collimation camera lens 6 formations in its place ahead respectively.The 3rd semiconductor laser 5 is the low-power semiconductor lasers that are used to send pilot light, itself and first, second semiconductor laser 3,4 is set to 90 degrees, be located on its institute corresponding collimation camera lens 6 place collimating mirror headstocks 14, be fixed on the base plate 1 by this collimating mirror headstock 14, before this collimation camera lens 6 is positioned at the 3rd semiconductor laser 5, constitute the pilot light collimated light path.
Light path turnover element in the present embodiment adopts corner cube prism, and wherein first corner cube prism 7 is fixed on the base plate 1 by the first corner cube prism seat 15, and second, third corner cube prism 8,9 is fixed on the base plate 1 by the second corner cube prism seat 16.Certainly also can adopt reflecting mirror or polarization splitting prism to wait and realize the light path turnover.
Coupled lens 10 is located in the coupled lens lens barrel 17, is fixed on the base plate 1 by optical fiber Connection Block 11.One termination of this coupled lens lens barrel 17 is received the incident that first, second, third semiconductor laser 3,4,5 sends laser, and the other end is installed a standard fiber interface 18, is used to connect optical fiber 19.
Optical fiber Connection Block 11 of the present invention, collimating mirror headstock 14, corner cube prism seat 15,16 etc. can be installed on the base plate 1 by screw 24.
Light path of the present invention as shown in Figure 2, first, second semiconductor laser 3,4 respectively send one the tunnel treatment light, the 3rd semiconductor laser 5 sends one road pilot light.The treatment light that sends of first semiconductor laser 3 direct incident coupled lens 10 after collimating wherein is through converging laggard optical fiber 19; To reenter through first, second corner cube prism 7,8 twice 90 ° of turnovers behind the treatment optical alignment that second semiconductor laser 4 sends and penetrate coupled lens 10, through converging laggard optical fiber 19; Pilot light that the 3rd semiconductor laser 5 sends collimation is after reenter after 9 90 ° of turnovers of the 3rd corner cube prism and penetrate coupled lens 10, through converging laggard optical fiber 19.Road treatment light without the corner cube prism turnover in three road light is positioned at the middle, and the treatment light and the pilot light of transferring through corner cube prism are distributed in about it.
Since the laser that sends of high power semiconductor lasers in the divergence of quick shaft direction much larger than slow-axis direction, so the collimation camera lens 6 of present embodiment each adopt the optical glass 21,22,23 that is arranged at three highs index of refraction in the collimating lens tube 20 laser to be collimated in the fast and slow axis direction as collimating lens.Like this, the laser that semiconductor laser sends after collimating in quick shaft direction divergence in 4 milliradians, slow-axis direction divergence has just formed a long narrow rectangular light spots in 25 milliradians, quick shaft direction is long, slow-axis direction is narrow.With first, second, the three or three semiconductor laser 3,4,5 quick shaft direction is all installed perpendicular to base plate 1, only use cheap corner cube prism 7 without the more expensive polarization splitting prism of price like this, 8,9, can be with first, second, the 3rd semiconductor laser 3,4, the long narrow hot spot that forms after 5 laser alignments of sending is stitched together compactly in narrow direction, wherein without one road light of prism turnover in the middle, be distributed in about it from axle incident illumination compactness through two tunnel of prism turnover, this three road light is focused into parallel distribution and some eclipsed three small light spot, incident optical 19 through coupled lens 10 again.
The treatment light luminous power that the high power semiconductor lasers that present embodiment adopts sends can reach 200mw, and wavelength is 630nm, and the pilot light luminous power that the low-power semiconductor laser sends can be 3mw, and wavelength is 650nm, satisfies optical fundus focus treatment requirement.This three road light focuses on about the about φ 300 μ m of spot diameter of back formation, utilizes φ 400 μ m multimode fibres light all can be imported and output like this.
Can adopt the optical glass 21,22,23 of the high index of refraction of following parameter in the present embodiment:
| Numbering | Radius (mm) | Thickness (mm) | Material |
| ????21 | ????-3.436 | ????1.6 | ????ZF6 |
| ????-3.356 | ????0.1 | ||
| ????22 | ????-9.375 | ????1.6 | ????ZF6 |
| ????-5.888 | ????0.1 | ||
| ????23 | ????infinity | ????1.6 | ????ZF6 |
| ????-14.09 |
And the coupled lens 10 of following parameter:
| Radius (mm) | Thickness (mm) | Material |
| ????17.515 | ????3 | ????K9 |
| ????infinity |
The quantity of the semiconductor laser of semiconductor laser alignment coupler of the present invention and light path turnover element etc. can be optionally and different, and the light path of its formation also can correspondingly be adjusted.
Claims (10)
1, a kind of semiconductor laser alignment coupler, it is characterized in that comprising base plate (1) and be installed on heat abstractor (2) on the base plate (1), a plurality of semiconductor lasers (3,4,5), with semiconductor laser (3,4,5) corresponding collimation camera lens (6), a plurality of light path turnover elements (7,8,9), coupled lens (10), optical fiber Connection Block (11), described a plurality of semiconductor laser (3,4,5) send multi-path laser, wherein one road laser converges the external optical fiber of incident (19) by coupled lens (10) behind corresponding collimation camera lens (6) collimation, other each road laser is respectively behind corresponding collimation camera lens (6) collimation, again through light path turnover element (7,8,9) turnover is converged the external optical fiber of incident (19) from axle incident coupled lens (10) by coupled lens (10).
2, semiconductor laser alignment coupler according to claim 1, it is characterized in that described semiconductor laser (3,4,5) comprises first, second semiconductor laser (3), (4) that are used to send treatment light and the 3rd semiconductor laser (5) that is used to send pilot light, wherein the treatment light that sends of first semiconductor laser (3) is direct through the external optical fiber of coupled lens (10) incident (19) through collimating after.
3, semiconductor laser alignment coupler according to claim 2, it is characterized in that treatment light that described second semiconductor laser (4) sends behind collimation again through twice 90 ° of turnovers of two light paths turnover element (7,8), from axle incident coupled lens (10); The pilot light that the 3rd semiconductor laser (5) sends behind collimation again through (9) 90 ° of turnovers of light path turnover element, from axle incident coupled lens (10).
4, semiconductor laser alignment coupler according to claim 3 is characterized in that described light path turnover element (7,8,9) is corner cube prism.
5, according to claim 1,2,3 or 4 described semiconductor laser alignment couplers, the quick shaft direction that it is characterized in that described semiconductor laser (3,4,5) is all perpendicular to base plate (1).
6,, it is characterized in that being distributed in the light path both sides of transferring from axle incident illumination compactness without light path turnover element through what light path turnover element (7,8,9) was transferred according to claim 1,2,3 or 4 described semiconductor laser alignment couplers.
7, according to claim 2 or 3 described semiconductor laser alignment couplers, it is characterized in that described first, second semiconductor laser (3), (4) are close in parallel to each other is installed on the heat abstractor (2), and heat abstractor scribbles heat-conducting silicone grease between (2), keeps suitable distance between this two-laser (3), (4).
8, semiconductor laser alignment coupler according to claim 1, it is characterized in that described heat abstractor (2) comprises fin (12) and radiator fan (13), wherein radiator fan (13) is installed on the two ends of fin (12), and its air supply direction is consistent and parallel with the radiating groove direction of fin (12).
9, semiconductor laser alignment coupler according to claim 1, it is characterized in that each collimation camera lens (6) is fixed on the base plate (1) by a collimation objective carrier (14), adopt the optical glass (21,22,23) that is arranged at three highs index of refraction in the collimating lens tube (20) to realize collimation.
10, semiconductor laser alignment coupler according to claim 1, it is characterized in that described coupled lens (10) is located in the coupled lens lens barrel (17), be fixed on the base plate (1) by optical fiber Connection Block (11), one termination of this coupled lens lens barrel (17) is received the incident that semiconductor laser (3,4,5) sends laser, the other end is installed a standard fiber interface (18), is used to connect optical fiber (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510023470 CN1644189A (en) | 2005-01-20 | 2005-01-20 | Semiconductor laser alignment coupler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510023470 CN1644189A (en) | 2005-01-20 | 2005-01-20 | Semiconductor laser alignment coupler |
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|---|---|
| CN1644189A true CN1644189A (en) | 2005-07-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315586A (en) * | 2010-06-29 | 2012-01-11 | 深圳市雷迈科技有限公司 | Semiconductor laser module with multiple detection sensors and protection devices |
| CN111308725A (en) * | 2020-04-02 | 2020-06-19 | 杭州欧镭激光技术有限公司 | Light beam shaping device for laser radar and shaping method of far-field light spot |
| CN111446625A (en) * | 2020-04-28 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | High-power short-wave semiconductor laser illuminator |
| CN111999827A (en) * | 2020-09-24 | 2020-11-27 | 武汉锐奥特科技有限公司 | Parallel light path structure and optical module |
-
2005
- 2005-01-20 CN CN 200510023470 patent/CN1644189A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315586A (en) * | 2010-06-29 | 2012-01-11 | 深圳市雷迈科技有限公司 | Semiconductor laser module with multiple detection sensors and protection devices |
| CN111308725A (en) * | 2020-04-02 | 2020-06-19 | 杭州欧镭激光技术有限公司 | Light beam shaping device for laser radar and shaping method of far-field light spot |
| CN111308725B (en) * | 2020-04-02 | 2023-11-14 | 杭州欧镭激光技术有限公司 | Beam shaping device for laser radar and shaping method of beam shaping device for laser radar on far-field light spots |
| CN111446625A (en) * | 2020-04-28 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | High-power short-wave semiconductor laser illuminator |
| CN111999827A (en) * | 2020-09-24 | 2020-11-27 | 武汉锐奥特科技有限公司 | Parallel light path structure and optical module |
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