CN109038213A - A kind of high-power semiconductor laser focusing export structure - Google Patents
A kind of high-power semiconductor laser focusing export structure Download PDFInfo
- Publication number
- CN109038213A CN109038213A CN201811245583.9A CN201811245583A CN109038213A CN 109038213 A CN109038213 A CN 109038213A CN 201811245583 A CN201811245583 A CN 201811245583A CN 109038213 A CN109038213 A CN 109038213A
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- Prior art keywords
- light
- diaphragm
- condenser lens
- semiconductor laser
- laser
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
Abstract
A kind of high-power semiconductor laser focusing export structure, including a condenser lens (10), for the hot spot of multiple laser superposition after beam shaping to be focused；It is characterized by: being placed in condenser lens (10) is equipped with diaphragm (20) afterwards, diameter and light transmission of angle to light beam after focusing are controlled；It is placed at the focal position of condenser lens (10) and is equipped with fiber output head (30), collectiong focusing light beam realizes the optical fiber transmission of high power laser light.The present invention, it is optimized using spherical aberration of the diaphragm to condenser lens, the excessive light of spot diameter at fiber output head and light transmission of angle is tentatively limited, the invalid amount of light of fiber output head part is effectively reduced, further decrease the temperature at fiber output head, the stability of device, while the restriction effect of diaphragm are effectively improved, the beam quality of semiconductor laser output laser can be effectively promoted.
Description
Technical field
The invention belongs to laser technology fields, specifically, being related to the focusing coupling of high-power semiconductor laser encapsulation
Close structure.
Background technique
Semiconductor laser has many advantages, such as that electrical efficiency is high, small in size, the service life is long, in military, medical treatment, communication, industry
Processing and other fields, which have, to be widely applied, the especially development of special optical fiber drawing technology, laser crystal growth technology, semiconductor
Laser wavelength in special optical fiber and laser crystal rare earth ion have the function of absorb excitation so that semiconductor laser
There is unique advantage in the pumping source application of optical-fiber laser, Solid State Laser technology.And it is defeated to laser in industrial process applications
The requirement of power level is higher and higher out, and the fiber laser technology of multikilowatt power level graduallyd mature in recent years, needs defeated
The stable semiconductor laser of power level height, good beam quality, performance is as its pumping source out.
High-power semiconductor laser often realizes optical fiber using beam shaping, focusing, coupling technique to multiple laser chips
Tail optical fiber output, the quantity of its higher laser chip of output power level is also more, focuses meeting in coupling process in beam shaping
There are more power losses.In packaging technology, carried out in beam shaping, focusing using the light that optical lens issues laser chip
Compression, focuses deflection, and the transmission of light beam, reflection efficiency are higher, the optical power very little of loss.In the coupling process of light beam
In, the deviation of the rigging position of optical fiber head, angle can all influence final coupling efficiency, wherein optical fiber fibre cannot be coupled into
Core is transmitted and causes the power of loss that can will lead to the liter of optical fiber head temperature in the external formation heat of optical fiber head, the accumulation of heat
Height has some impact on the fixed stability of optical fiber head, can all generate shadow to the service life of output power stability, laser
It rings.Rigging error can be reduced to a certain extent by the adjusting of assembly, improve coupling efficiency, but due to the ball of condenser lens
Difference effect still can some power dissipate in optical fiber head position, for high-power semiconductor laser be even more do not allow to neglect
Depending on.Patent 201711404131.6 discloses a kind of fiber coupling input end structure, using the optical fiber with side abradant surface
Removing reduction is carried out to extra light with the optical fiber output end structure of one or more optical waveguide structures with side abradant surface
Thermal damage of the fibre cladding light to optical fiber.But this method processing difficulties, are unfavorable for mass production.
Summary of the invention
For the fiber-optic output temperature characterisitic of high-power semiconductor laser, the technical problems to be solved by the invention
It is to propose that a kind of high-power semiconductor laser focuses export structure, to reduce fiber-optic output temperature, while improves semiconductor
The beam quality of laser.
The technical solution adopted by the present invention is that: a kind of high-power semiconductor laser focusing export structure, including a focusing
Lens, for the hot spot of multiple laser superposition after beam shaping to be focused；It is characterized by: being set after being placed in condenser lens
There is diaphragm, the diameter and light transmission of angle to light beam after focusing control；It is placed at the focal position of condenser lens and is equipped with
Fiber output head, collectiong focusing light beam realize the optical fiber transmission of high power laser light.
The condenser lens be single lens also or the lens group that constitutes of multiple lens, and its light pass surface is coated with laser
Wavelength matched high transmittance film layer.
The clear aperature of the diaphragm is processed into taper aperture, while doing frosted on surface and handling the light for preventing from being blocked
It is formed and is reflected on diaphragm surface.
The fiber output head is assembled by optical fiber, glass tube, metal tube, and optical fiber output end surface is coated with laser wave
Long matched high transmittance film layer.
Compared with prior art, the present invention can obtain following the utility model has the advantages that being limited using diaphragm focus on light beam,
The light beam that a part cannot be coupled into optical fiber in focus on light beam is intercepted, reduces condenser lens ball to a certain extent
The temperature at fiber output head is effectively reduced so that focal beam spot becomes smaller in the spot diameter of optical fiber output end surface in the effect of difference
Degree, improves the stability of device.When clear aperture diameter calculates in diaphragm face, numeric aperture values can be set as being less than optical fiber
The angle of the value in own value aperture, the light finally transmitted in optical fiber can be less than normal, can effectively improve semiconductor laser
Beam quality.The encapsulation of the good high-power semiconductor laser of high light beam quality, stability may be implemented by this programme.
Detailed description of the invention
Fig. 1 is that the present invention focuses export structure light transmission schematic diagram.
Fig. 2 is that the present invention focuses light transmission schematic diagram when diaphragm being not used in export structure.
Fig. 3 is fiber output head structural schematic diagram of the present invention.
Fig. 4 is that diaphragm clear aperature of the present invention calculates schematic diagram.
In attached drawing: 10 condenser lenses, 20 diaphragms, 30 fiber output heads, 31 optical fiber, 32 glass tubes, 33 metal tubes.
Specific embodiment
Presently filed embodiment is described in detail below in conjunction with accompanying drawings and embodiments, how the application is applied whereby
Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.
Known by Fig. 1, to focus export structure in the embodiment of the present invention, includes condenser lens 10, be used to more laser chips
The superposition hot spot that the laser of transmitting is formed after fast and slow axis compression, direction deviation is focused；Diaphragm 20 is placed in condenser lens 10
Appropriate location afterwards controls the diameter of focus on light beam；Fiber output head 30 is placed at the focal position of condenser lens 10 and connects
Pinching defocused laser beam realizes the optical fiber transmission of laser.
Condenser lens 10 can be a single element lens and be also possible to the lens group being made of several lens, be used to parallel
Hot spot is focused, and when lens group being made of in condenser lens 10 several lens, each lens group lens were by being coated with laser on face
Wavelength matched high transmittance film layer realizes the transmission of light.
20 clear aperature of diaphragm is processed into pyramidal structure.Frosted processing is done on 20 surface of diaphragm, prevents 20 surface of diaphragm to sharp
Light light beam causes the normal work of other devices of reflections affect.Diaphragm 20 using have high thermal conductivity coefficient metal material such as copper,
Stainless steel etc. is process, and is dispersed the useless light at fiber output head 30 using diaphragm 20, and in the form of heat
It dissipates.
Know it is 30 structural schematic diagram of fiber output head of the present invention by Fig. 1, the fiber output head 30 is by peeling off coat
Optical fiber 31, glass tube 32, metal tube 33 are assembled, and using end face coating scheme after having assembled, improve laser in optical fiber output
The laser transmittance of first 30 end face realizes the output of laser tail optical fiber.
Known by Fig. 1 and Fig. 2, respectively laser, which focuses, has diaphragm and transmit simulation feelings without diaphragm time line in output system
Condition can be seen that condenser lens 10 has certain spherical aberration after focusing at the focal position at fiber output head 30 in Fig. 2,
So that the spot diameter of focal point is become larger, causes to have at fiber output head 30 more light due to spot diameter or light angle
Problem cannot be coupled into the transmission of optical fiber 31.The some light will be dissipated at optical output heads 30 in the form of heat, make light
Temperature increases at fine export head 30, influences stability and the service life of laser.To focus on light beam diameter after increase diaphragm 20 in Fig. 1
It is preferential everywhere at 20 position of diaphragm the light that limitation makes focal point diameter or angle be greater than 31 range of receiving of optical fiber has been carried out
Reason, reduces the invalid amount of light at fiber output head 30, eventually reduces the temperature of fiber output head 30.
Known by Fig. 4, calculates schematic diagram for diaphragm clear aperature, display largest beam aperture, light beam after diaphragm 20 in figure
Maximum angle is α, the distance d of 20 identity distance fiber output head of diaphragm, 30 end face, the clear aperture diameter D of diaphragm face.According in figure
Formula can calculate the clear aperture diameter at diaphragm front-back.Formula are as follows:
NA value is the numerical aperture of optical fiber in formula, and NA value can be set as being less than fiber numerical aperture by clear aperature when calculating
Numerical value calculated, further limit the angle of the light transmitted in optical fiber, obtain the laser output of high light beam quality.
Above description has shown and described preferred embodiment of the present application, but as previously described, it should be understood that the application is not
It is confined to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification
And environment, and can be carried out in application contemplated scope described herein by the above teachings or related fields of technology or knowledge
Change.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in the application institute
In attached scope of protection of the claims.
Claims (4)
1. a kind of high-power semiconductor laser focuses export structure, including a condenser lens (10), being used for will be after beam shaping
Multiple laser superposition hot spot be focused；It is characterized by: being placed in condenser lens (10) is equipped with diaphragm (20) afterwards, to focusing
The diameter of light beam and light transmission of angle are controlled afterwards；It is placed at the focal position of condenser lens (10) and is equipped with fiber output head
(30), collectiong focusing light beam realizes the optical fiber transmission of high power laser light.
2. a kind of high-power semiconductor laser according to claim 1 focuses export structure, it is characterised in that: described
Condenser lens (10) be single lens also or the lens group that constitutes of multiple lens, and to be coated with optical maser wavelength matched for its light pass surface
High transmittance film layer.
3. a kind of high-power semiconductor laser according to claim 1 focuses export structure, it is characterised in that: described
The clear aperature of diaphragm (20) is processed into taper aperture, while doing frosted processing on surface prevents the light being blocked on diaphragm surface
Form reflection.
4. a kind of high-power semiconductor laser according to claim 1 focuses export structure, it is characterised in that: described
Fiber output head (30) is assembled by optical fiber (31), glass tube (32), metal tube (33), and fiber output head (30) end face is coated with
The matched high transmittance film layer of optical maser wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245583.9A CN109038213A (en) | 2018-10-24 | 2018-10-24 | A kind of high-power semiconductor laser focusing export structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245583.9A CN109038213A (en) | 2018-10-24 | 2018-10-24 | A kind of high-power semiconductor laser focusing export structure |
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| Publication Number | Publication Date |
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| CN109038213A true CN109038213A (en) | 2018-12-18 |
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| CN201811245583.9A Pending CN109038213A (en) | 2018-10-24 | 2018-10-24 | A kind of high-power semiconductor laser focusing export structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812783A (en) * | 2020-06-01 | 2020-10-23 | 深圳活力激光技术有限公司 | Optical fiber coupling structure and semiconductor laser |
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| GB1193567A (en) * | 1968-02-15 | 1970-06-03 | Eltro G M B H & Co Ges Fur Str | Optical Aiming and Laser Rangefinding Apparatus. |
| JPH0792348A (en) * | 1993-09-21 | 1995-04-07 | Toshiba Corp | Device for making laser beam incident on optical fiber |
| JP2004029229A (en) * | 2002-06-24 | 2004-01-29 | Nec Corp | Fiber joint optical system |
| JP2006220953A (en) * | 2005-02-10 | 2006-08-24 | Olympus Corp | Laser beam emitter and microscope equipment with laser beam emitter |
| CN1866645A (en) * | 2006-06-09 | 2006-11-22 | 中国科学院上海光学精密机械研究所 | Pulse width adjustable acoustic-optic Q-switched double cladded fiber laser |
| CN104521077A (en) * | 2012-05-30 | 2015-04-15 | Ipg光子公司 | High power spatial filter |
| CN204696441U (en) * | 2015-06-08 | 2015-10-07 | 吉林大学 | Axial pumping row ripple amplifies liquid-core optical fibre laser |
| CN108680992A (en) * | 2018-07-23 | 2018-10-19 | 江苏天元激光科技有限公司 | A kind of focusing coupled output structure |
| CN208835450U (en) * | 2018-10-24 | 2019-05-07 | 江苏天元激光科技有限公司 | A kind of high-power semiconductor laser focusing export structure |
-
2018
- 2018-10-24 CN CN201811245583.9A patent/CN109038213A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1193567A (en) * | 1968-02-15 | 1970-06-03 | Eltro G M B H & Co Ges Fur Str | Optical Aiming and Laser Rangefinding Apparatus. |
| US3610755A (en) * | 1968-02-15 | 1971-10-05 | Eltro Gmbh | Optical sighting and/or observation set combined with a laser telemetry unit |
| JPH0792348A (en) * | 1993-09-21 | 1995-04-07 | Toshiba Corp | Device for making laser beam incident on optical fiber |
| JP2004029229A (en) * | 2002-06-24 | 2004-01-29 | Nec Corp | Fiber joint optical system |
| JP2006220953A (en) * | 2005-02-10 | 2006-08-24 | Olympus Corp | Laser beam emitter and microscope equipment with laser beam emitter |
| CN1866645A (en) * | 2006-06-09 | 2006-11-22 | 中国科学院上海光学精密机械研究所 | Pulse width adjustable acoustic-optic Q-switched double cladded fiber laser |
| CN104521077A (en) * | 2012-05-30 | 2015-04-15 | Ipg光子公司 | High power spatial filter |
| CN204696441U (en) * | 2015-06-08 | 2015-10-07 | 吉林大学 | Axial pumping row ripple amplifies liquid-core optical fibre laser |
| CN108680992A (en) * | 2018-07-23 | 2018-10-19 | 江苏天元激光科技有限公司 | A kind of focusing coupled output structure |
| CN208835450U (en) * | 2018-10-24 | 2019-05-07 | 江苏天元激光科技有限公司 | A kind of high-power semiconductor laser focusing export structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812783A (en) * | 2020-06-01 | 2020-10-23 | 深圳活力激光技术有限公司 | Optical fiber coupling structure and semiconductor laser |
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