CN108899747A - A kind of light supply apparatus based on fluorescent crystal pumping optical waveguide - Google Patents

A kind of light supply apparatus based on fluorescent crystal pumping optical waveguide Download PDF

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Publication number
CN108899747A
CN108899747A CN201810995461.5A CN201810995461A CN108899747A CN 108899747 A CN108899747 A CN 108899747A CN 201810995461 A CN201810995461 A CN 201810995461A CN 108899747 A CN108899747 A CN 108899747A
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CN
China
Prior art keywords
optical waveguide
light
fluorescent crystal
supply apparatus
pumping
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Pending
Application number
CN201810995461.5A
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Chinese (zh)
Inventor
李康
乔敦
张博
曹辉
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Henan Baihe Special Optical Research Institute Co ltd
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Foshan Huikang Photoelectric Technology Co Ltd
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Priority to CN201810995461.5A priority Critical patent/CN108899747A/en
Publication of CN108899747A publication Critical patent/CN108899747A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09Processes or apparatus for excitation, e.g. pumping
    • H01S3/091Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02Constructional details
    • H01S3/04Arrangements for thermal management
    • H01S3/0407Liquid cooling, e.g. by water
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02Constructional details
    • H01S3/04Arrangements for thermal management
    • H01S3/042Arrangements for thermal management for solid state lasers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16Solid materials
    • H01S3/163Solid materials characterised by a crystal matrix
    • H01S3/164Solid materials characterised by a crystal matrix garnet
    • H01S3/1643YAG

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

The invention discloses a kind of light supply apparatus based on fluorescent crystal pumping optical waveguide, the diode including several transmitting pump lights further includes:Pump optical waveguide assembly;The plano-convex lens of the pump light waveguide end are set;The diode is distributed in the protrusion front side of the plano-convex lens and the light of the pump light enters the pumping optical waveguide assembly by the plano-convex lens;The pumping optical waveguide assembly includes:Quartz socket tube;It is built in the fluorescent crystal stick of the quartz socket tube;Seal two incident optical windows at the quartz socket tube both ends;It is directed in the quartz socket tube and is submerged in the waveguide liquid of the fluorescent crystal stick.The pumping fluorescent crystal of efficient stable can be capable of and generate green-yellow light.

Description

A kind of light supply apparatus based on fluorescent crystal pumping optical waveguide
Technical field
The present invention relates to optical field more particularly to a kind of light supply apparatus based on fluorescent crystal pumping optical waveguide.
Background technique
Mainly there is yellow/green light diode (LED) yellowish green radiant in existing market, green-yellow light laser diode (LD) and compared with Based on large-scale yellowish green light laser.LED product is although low in cost, but intensity is lower, tend not to meet Projection Display or The demand of medical application;And LD product cost is high, efficiency is lower, and core technology is gripped tightly by overseas business, at present very Difficult large-scale application;Yellowish green light laser is then because high operation and maintenance cost also can not large-scale uses.Therefore, one is developed Kind is novel, and inexpensive and reliable yellowish green radiant is particularly important.
The cost high compared to green-yellow light laser diode, blue light laser diode technology relative maturity, at present by It is widely applied, fluorescent material is pumped by blue laser can also generate green-yellow light, and laser pump (ing) fluorescent light source is cheap with its Price, relatively simple structure and longer service life become the hot spot technology of the next-generation yellowish green radiant of exploitation, however fluorescence Material does not tolerate high temperature, is easy to generate hot Quenching under the fuel factor of laser irradiation, leads to decrease in efficiency, output Under powered problem, thus, by effective structure be designed to deal with laser pump (ing) fluorescent light source heat dissipation and light beam it is whole The problems such as shape, becomes for key problem.The Casio company of Japan takes the lead in being proposed laser pump (ing) phosphor source projector, And to put goods on the market.Its essential core component is high-speed rotating fluorescent powder wheel, by making fluorescent powder wheel high speed rotation, Neng Gouran Fluorescent powder wheel is heated evenly, and effectively carries out heat exchange with air, to evade the hot Quenching of fluorescent powder wheel.But fluorescence The rotation of powder wheel needs the mechanical devices such as motor, and the introducing of mechanical part reduces the reliability and service life of equipment again.Separately A kind of technology is then that fluorescent crystal is directly pumped using blue laser, and this technical body is simple, does not depend on mechanical device, reliably Property it is high, but design difficulty is larger, mainly concentrates on the contradiction of crystal heat dispersion structure and optical beam path design.
Summary of the invention
In order to overcome the above technical defects, the present invention provides a kind of light supply apparatus based on fluorescent crystal pumping optical waveguide, The pumping fluorescent crystal of efficient stable can be capable of and generate green-yellow light.
To solve the above-mentioned problems, the present invention is achieved by following technical scheme:
A kind of light supply apparatus based on fluorescent crystal pumping optical waveguide, the diode including several transmitting pump lights, is also wrapped It includes:Pump optical waveguide assembly;The plano-convex lens of the pump light waveguide end are set;The diode is distributed in the plano-convex On front side of the protrusion of lens and the light of the pump light enters the pumping optical waveguide assembly by the plano-convex lens;
The pumping optical waveguide assembly includes:Quartz socket tube;It is built in the fluorescent crystal stick of the quartz socket tube;Sealing institute State two incident optical windows at quartz socket tube both ends;It is directed in the quartz socket tube and is submerged in the waveguide liquid of the fluorescent crystal stick Body.
Further, the center line of the axle center of the fluorescent crystal stick and the quartz socket tube is the inclined of non-same horizontal line It feels at ease and sets.
Further, include in the fluorescent crystal stick doped with a certain amount of caesium metal ion yag crystal or Lutetium aluminum carbuncle crystal or ceramic crystal;
The fluorescent crystal stick is cylindric and is fixed between described two incident optical windows, fluorescent crystal stick both ends End face by polishing treatment and be coated with 200 microns of thick metallic reflective coatings, side handles by frosted and forms frosted glass table Face.
Further, the incident optical window is metal copper sheet, and the metallic copper on piece offers several plated film windows, described Plated film window outboard face is used to the pump light of anti-reflection incidence, and inner surface is used to the green-yellow light that high reflection is excited.
Further, the circular casing that the refractive index of the quartz socket tube is 1.4586, the quartz socket tube length are 80mm, internal diameter 7mm, outer diameter 8mm, pipe thickness 1mm.
Further, the waveguide liquid be refractive index be less than the quartz socket tube refractive index pure water, the pump The total internal reflection on quartz socket tube inner wall of Pu light.
Further, the pump light inside the pumping optical waveguide assembly is cooled down by the waveguide liquid, described Pump light forms the lower blue green light of power density after absorbing by the fluorescent crystal stick, and the blue green light is finally from described glimmering It is projected around as lambert's body light source the side of luminescent crystal stick.
Further, the pump light is projected by total 16 diodes of 4 rows 4 column, and the pump light includes but is not limited to Blue laser.
Further, the diameter of the plano-convex lens is 50mm, and focal length 36mm is made of optical glass material;
The both ends that the plano-convex lens and the diode are co-located on the pumping optical waveguide assembly form both ends pump Pu or any one end for being co-located on the pumping optical waveguide assembly form single-ended pumping.
Further, the diameter that the fluorescent crystal stick is is 2mm, and length is the cylinder of 80mm.
Compared with prior art, the beneficial effects of the invention are as follows:
The invention discloses a kind of light supply apparatus based on fluorescent crystal pumping optical waveguide, can be realized and send out pumping laser Light out is converted to the blue green light of low cost.Wherein, the fluorescent crystal stick inside the light supply apparatus can provide it is biggish enter It penetrates face, improves and absorb energy, while the heat dissipation area of crystal bar can also be increased, significantly reduce hot-quenching and go out the risk of generation, improve The stability of light source conversion.In addition, built-in waveguide liquid has both cooling and guide-lighting effect, for the laser pump for realizing higher power Pu provides feasible program.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, wherein:
Fig. 1 is a kind of structural representation of the light supply apparatus disclosed by the embodiments of the present invention based on fluorescent crystal pumping optical waveguide Figure;
Fig. 2 is the light conversion signal of the light supply apparatus disclosed by the embodiments of the present invention based on fluorescent crystal pumping optical waveguide Figure.
In figure:
1- first diode;The first plano-convex lens of 2-;The incident optical window of 3- first;4- the first filming window;5- quartz socket tube; 6- waveguide liquid;7- fluorescent crystal stick;8- the second plated film window;The incident optical window of 9- second;The second plano-convex lens of 10-;11- second Diode;12- first converges light;13- transverse light rays;The yellowish green light of 14-;15- second converges light.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment one:
As shown in Figure 1, the invention discloses a kind of light supply apparatus based on fluorescent crystal pumping optical waveguide, if including drying hair The diode for penetrating pump light further includes:Pump optical waveguide assembly;The plano-convex lens of the pump light waveguide end are set;Institute State that diode is distributed in the protrusion front side of the plano-convex lens and the light of the pump light enters institute by the plano-convex lens State pumping optical waveguide assembly;The pumping optical waveguide assembly includes:Quartz socket tube 5;It is built in the fluorescent crystal stick of quartz socket tube 5 7;Seal two incident optical windows at 5 both ends of quartz socket tube;It is directed in quartz socket tube 5 and is submerged in the waveguide liquid of fluorescent crystal stick 7 Body 6.
Preferably, the both ends that the plano-convex lens and the diode are co-located on the pumping optical waveguide assembly are formed Two end-pumpings or any one end for being co-located on the pumping optical waveguide assembly form single-ended pumping.As shown in Fig. 2, this hair The light transition diagram of the disclosed light supply apparatus based on fluorescent crystal pumping optical waveguide of bright embodiment.Figure it is seen that The present embodiment is two end-pumpings, and light is injected from the both ends of the pumping optical waveguide assembly respectively respectively.
Preferably, the pump light is projected by total 16 diodes of 4 rows 4 column, and the pump light includes but is not limited to indigo plant Color laser.I.e. first diode 1 is the laser diode of 4X4 array, and the second diode 11 is in the pumping optical waveguide assembly Other end is all the laser diode of 4X4 array, and reflection light enters the pumping optical waveguide to both ends laser diode simultaneously Component can more efficiently provide the green-yellow light of needs.
Preferably, the diameter of the plano-convex lens is 50mm, and focal length 36mm is made of optical glass material;One or two The light that pole pipe 1 emits forms the first convergence light 12 by the first plano-convex lens 2, and the light of the second diode 11 transmitting passes through Second plano-convex lens 10 form the second convergence light 15, wherein the first convergence light 12 passes through first on the first incident optical window 3 Plated film window 4, the second convergence light 15 respectively enter institute by the second plated film window 8 on the second incident optical window 9, two light State pumping optical waveguide assembly.
Preferably, the center line of the axle center of fluorescent crystal stick 7 and quartz socket tube 5 is the eccentric placement of non-same horizontal line, In the present embodiment, it can be seen that fluorescent crystal stick 7 is located at the top half of quartz socket tube 5, and this design is by repeatedly The optimum position obtained after experimental debugging sees that the center of circle of fluorescent crystal stick 7 and the center of circle of quartz ampoule are not weighed in cross-sectional direction It closes, bias design can make fluorescent crystal stick 7 reach highest to the absorption efficiency of pump light.
Preferably, in order to enable the better absorption spectrum and emission spectrum of fluorescent crystal stick 7 separate and interval is little, light Line transformation efficiency is higher.It include the yag crystal or lutetium aluminum doped with a certain amount of caesium metal ion in fluorescent crystal stick 7 Garnet crystal or ceramic crystal, fluorescent crystal stick 7 also have quantum efficiency high, and thermal conductivity is preferable and thermal stability is well etc. special Point, in 600K temperature hereinafter, significant hot-quenching will not occur for the fluorescent crystal stick 7 of low doping concentration goes out.In the present embodiment, glimmering Luminescent crystal stick 7 can emit the green-yellow light of 500-700nm wave band when absorbing blue laser, and peak value is in 536nm.
Preferably, fluorescent crystal stick 7 is cylindric and is fixed between described two incident optical windows, 7 liang of fluorescent crystal stick The end face at end is by polishing treatment and is coated with 200 microns of thick metallic reflective coatings, and side handles by frosted and forms frosted glass Surface.The light beam of 13 lateral transport of transverse light rays is reflected into waveguide in Fig. 2, thus prevent through pumping generate green-yellow light from Two end face outgoing.The side frosted of fluorescent crystal stick 7 is handled, thus destroys the total internal reflection of coolant liquid-crystal bar interface Condition.
Preferably, the incident optical window is metal copper sheet, and the metallic copper on piece offers several plated film windows, the plating Film window outboard face is used to the pump light of anti-reflection incidence, and inner surface is used to the green-yellow light that high reflection is excited.The plated film window The transmissivity for enough improving blue wave band, reduces the transmissivity of yellowish green optical band.
Preferably, the circular casing that the refractive index of quartz socket tube 5 is 1.4586,5 length of quartz socket tube are 80mm, and internal diameter is 7mm, outer diameter 8mm, pipe thickness 1mm.The waveguide liquid 6 of low-refraction is filled with to quartz socket tube 5, outside fluorescent crystal stick 7 Wall and quartzy inside pipe wall are full of waveguide liquid 6, and incident ray is emitted directly toward in waveguide liquid 6 from plated film window.Further, wave Drain body 6 is refractive index for the pure water less than 5 refractive index of quartz socket tube, and the pump light is complete interior on 5 inner wall of quartz socket tube Reflection constantly injects fluorescent crystal stick 7, so that fluorescent crystal stick 7 be enable sufficiently to inhale by multiple total internal reflection repeatedly Pump energy is received, while also effectively reducing pump power density.The optical waveguide of waveguide liquid 6 has both cooling and guide-lighting work With to realize that the laser pump (ing) of higher power provides feasible program.
Preferably, it pumps the pump light inside optical waveguide assembly to cool down by waveguide liquid 6, the pump light passes through Fluorescent crystal stick 7 forms the lower blue green light of power density after absorbing, yellowish green light 14 is finally made from the side of fluorescent crystal stick 7 It is projected around for lambert's body light source.
Further, the diameter that fluorescent crystal stick 7 is is 2mm, and length is the cylinder of 80mm.Although this diameter is higher than glimmering The optical absorption depth (absorption efficiency that will affect fluorescent crystal stick 7) of luminescent crystal, but it is limited to existing precise machining process, this Thickness is optimal selection, and the absorption efficiency that can take into account crystal and the thermal stress deformation in thermal expansion are guaranteeing fluorescent crystal Stick 7 will not because thermal expansion deformation burst apart feelings under the premise of, possess highest absorption efficiency.The design of pole shape is mainly The sufficiently large lateral area of guarantee, biggish lateral area can provide the biggish plane of incidence for pump light source, improve and absorb energy, The heat dissipation area of fluorescent crystal stick 7 can also be increased simultaneously, improve the heat exchange area of crystal item and cooling medium, significantly reduce heat The risk of generation is quenched, improves system stability.In this example, quartz socket tube 5 is processed as circle, and quartz ampoule can be also processed For ellipse or other faces type.
Through realistic simulation as a result, the absorptivity of fluorescent crystal stick 7 is up to 91.8% in quartz socket tube 5 in the present embodiment, Higher pump light absorption efficiency may be implemented in growth optical waveguide appropriate.
Embodiment two:
The present embodiment and embodiment one the difference is that, the plano-convex lens and the diode are co-located on institute Any one end for stating pumping optical waveguide assembly forms single-ended pumping, the principle and embodiment that light is converted in this design first is that Identical, the structure only designed is simpler, but the efficiency converted is high not as good as embodiment, can be in the need of lower conversion Implement under the conditions of asking.
The other structures of light supply apparatus based on fluorescent crystal pumping optical waveguide described in the present embodiment referring to the prior art, This is repeated no more.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore Without departing from the technical solutions of the present invention, according to the technical essence of the invention it is to the above embodiments it is any modification, Equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.

Claims (10)

1. a kind of light supply apparatus based on fluorescent crystal pumping optical waveguide, the diode including several transmitting pump lights, feature It is, further includes:Pump optical waveguide assembly;The plano-convex lens of the pump light waveguide end are set;The diode distribution On front side of the protrusion of the plano-convex lens and the light of the pump light enters the pumping optical waveguide by the plano-convex lens Component;
The pumping optical waveguide assembly includes:Quartz socket tube;It is built in the fluorescent crystal stick of the quartz socket tube;Seal the stone The incident optical window of two of English casing both ends;It is directed in the quartz socket tube and is submerged in the waveguide liquid of the fluorescent crystal stick.
2. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the fluorescence The center line of the axle center of crystal bar and the quartz socket tube is the eccentric placement of non-same horizontal line.
3. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the fluorescence It include the yag crystal or lutetium aluminum carbuncle crystal or ceramic crystal doped with a certain amount of caesium metal ion in crystal bar;
The fluorescent crystal stick is cylindric and is fixed between described two incident optical windows, the end at fluorescent crystal stick both ends Face is by polishing treatment and is coated with 200 microns of thick metallic reflective coatings, and side handles by frosted and forms frosted glass surface.
4. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the incidence Optical window is metal copper sheet, and the metallic copper on piece offers several plated film windows, the plated film window outboard face be used to it is anti-reflection enter The pump light penetrated, inner surface are used to the green-yellow light that high reflection is excited.
5. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the quartz The circular casing that the refractive index of casing is 1.4586, the quartz socket tube length are 80mm, internal diameter 7mm, outer diameter 8mm, pipe Wall thickness is 1mm.
6. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the waveguide Liquid is refractive index for the pure water less than the quartz socket tube refractive index, and the pump light is complete interior anti-on quartz socket tube inner wall It penetrates.
7. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the pumping Pump light inside optical waveguide assembly is cooled down by the waveguide liquid, and the pump light is inhaled by the fluorescent crystal stick The lower blue green light of power density is formed after receipts, the blue green light is finally from the side of the fluorescent crystal stick as lambert's body light It projects around in source.
8. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the pumping Light is projected by total 16 diodes of 4 rows 4 column, and the pump light includes but is not limited to blue laser.
9. the light supply apparatus according to claim 1 based on fluorescent crystal pumping optical waveguide, which is characterized in that the plano-convex The diameter of lens is 50mm, and focal length 36mm is made of optical glass material;
The plano-convex lens and the diode be co-located on it is described pumping optical waveguide assembly both ends formed two end-pumpings or Any one end that person is co-located on the pumping optical waveguide assembly forms single-ended pumping.
10. the light supply apparatus according to claim 2 based on fluorescent crystal pumping optical waveguide, which is characterized in that described glimmering The diameter that luminescent crystal stick is is 2mm, and length is the cylinder of 80mm.
CN201810995461.5A 2018-08-29 2018-08-29 A kind of light supply apparatus based on fluorescent crystal pumping optical waveguide Pending CN108899747A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110728061A (en) * 2019-10-16 2020-01-24 郑州迈拓信息技术有限公司 Ceramic surface pore detection method based on Lambert body reflection modeling

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102570251A (en) * 2010-12-17 2012-07-11 泰勒斯公司 Device for emitting a laser beam with anti-transverse lasing and with longitudinal cooling
CN104852265A (en) * 2015-06-10 2015-08-19 湖北工业大学 High-efficiency holmium laser
CN108180403A (en) * 2018-02-12 2018-06-19 中国人民大学 A kind of liquid cold laser light-emitting device and preparation method thereof
CN208986361U (en) * 2018-08-29 2019-06-14 佛山市辉康光电技术有限公司 A kind of light supply apparatus based on fluorescent crystal pumping optical waveguide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102570251A (en) * 2010-12-17 2012-07-11 泰勒斯公司 Device for emitting a laser beam with anti-transverse lasing and with longitudinal cooling
CN104852265A (en) * 2015-06-10 2015-08-19 湖北工业大学 High-efficiency holmium laser
CN108180403A (en) * 2018-02-12 2018-06-19 中国人民大学 A kind of liquid cold laser light-emitting device and preparation method thereof
CN208986361U (en) * 2018-08-29 2019-06-14 佛山市辉康光电技术有限公司 A kind of light supply apparatus based on fluorescent crystal pumping optical waveguide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110728061A (en) * 2019-10-16 2020-01-24 郑州迈拓信息技术有限公司 Ceramic surface pore detection method based on Lambert body reflection modeling

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