CN105244737A - Pump coupler for hectowatt fiber laser - Google Patents
Pump coupler for hectowatt fiber laser Download PDFInfo
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- CN105244737A CN105244737A CN201510802602.3A CN201510802602A CN105244737A CN 105244737 A CN105244737 A CN 105244737A CN 201510802602 A CN201510802602 A CN 201510802602A CN 105244737 A CN105244737 A CN 105244737A
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- fiber laser
- heat conduction
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Abstract
The invention relates to a pump coupler for a hectowatt fiber laser, which comprises a packaging shell. A pump fiber and a main fiber are guided inside the packaging shell; the packaging shell comprises an optical adhesive layer, the optical adhesive layer is coated with light guiding glass, the light guiding glass is coated with a heat conduction adhesive layer, a heat conduction copper tube sleeves the heat conduction adhesive layer, cooling sheets are distributed around the heat conduction copper tube, a temperature sensor for sensing working temperature is embedded inside the heat conduction copper sleeve, and a temperature controller for monitoring a working condition is connected with a temperature sensor. The packaging shell can effectively cool the pump coupler, the working temperature of the pump coupler is monitored via the temperature sensor, and thus the pump coupler can work stably for a long time in the fiber laser. Through the temperature sensor and the temperature controller, the pump coupler can work stably for a long time in the hectowatt fiber laser and is particularly applicable to an environment in a factory with uninterrupted production all day long.
Description
Technical field
The present invention relates to a kind of pumping coupler for hectowatt grade fiber laser.
Background technology
Fiber laser with its good beam quality, the significant advantage such as conversion efficiency is high, pumping threshold is low, perfect heat-dissipating, small in volume, be subject to the extensive concern of various countries researcher, obtain development at full speed this year.Particularly high-capacity optical fiber laser is with the stability of the beam quality of its brilliance, superelevation, easy using method and the real advantage such as non-maintaining, become the representative of third generation laser technology, the fields such as automobile, aircraft, shipbuilding are widely used in, as covering cutting, Plate Welding, part restore by people.
Pumping coupler is the key passive optical device of fiber laser, and the coupling pump light that multirouting semiconductor laser produces enters in main fiber, for fiber laser provides required pumping light power by it.Its operation principle is light when transmitting in a fiber, and most of concentration of energy, in fibre core, only has sub-fraction to transmit in covering.When distance between two optical fiber is enough near, due to the effect of evanescent wave, the light field in two optical fiber is coupled, thus has influence on the distribution of optical fiber Central Plains light field.
Because pumping coupler is in consequence in fiber laser, this year, the development of pumping coupler became the study hotspot of countries in the world field of high power fiber lasers researcher, if the people such as ThomsTheeg of Hanoverian, Germany laser center in 2012 is by 6 tunnel coreless fiber and the welding of doubly clad optical fiber side, obtain optimistic coupling efficiency by the fusion degree of depth and coreless fiber controlling coreless fiber and doubly clad optical fiber at the angle of inclination of coupled zone.They make (6+1) * 1 coupler by the method, then by pumping optical fiber and 6 tunnel coreless fiber weldings, coupling efficiency is between 89% to 95%, and maximumly can be coupled into 400W pump light, flashlight insertion loss is less than 15d.Although they have reached higher level by the pumping coupler coupling efficiency of development, and can be used for hectowatt grade fiber laser, affect pumping coupler long-term work effect therein when temperature is higher, stability reduces, and cannot monitor in real time according to internal temperature situation.
Summary of the invention
For the weak point existed in the problems referred to above, the invention provides a kind of pumping coupler for hectowatt grade fiber laser.
For achieving the above object, the invention provides a kind of pumping coupler for hectowatt grade fiber laser, comprising:
Package casing, imports pumping optical fiber and main fiber in described package casing inside;
Described package casing comprises optical cement layer, guide-lighting glass is had in described optical cement layer outer wrap, described guide-lighting glass outer is enclosed with heat conduction glue-line, it is outside that heat-conducting copper pipe is sleeved on described heat conduction glue-line, fin is distributed in around described heat-conducting copper pipe, it is inner that temperature sensor for responding to working temperature is embedded in described heat conduction copper sheathing, and the temperature controller for follow-up work situation is connected with described temperature sensor.
Improve further as the present invention, described pumping optical fiber comprises fibre core, has covering in described fibre core outer wrap, and described covering outer wrap has for the coat not by environmental damage.
Improve further as the present invention, described fiber core refractive index is greater than described cladding index.
Improve further as the present invention, described main fiber comprises fibre core, has inner cladding in described fibre core outer wrap, and it is outside that surrounding layer is wrapped in described inner cladding.
Improve further as the present invention, described inner cladding refractive index is greater than described cladding refractive index.
Improve further as the present invention, glass guide-lighting described in both sides and described surrounding layer are bonded as one by described optical cement layer,
Improve further as the present invention, described optical cement layer and described guide-lighting glass refraction are greater than described cladding refractive index.
Improve further as the present invention, described guide-lighting glass outer surface frosted process.
Improve further as the present invention, glass guide-lighting described in both sides and described heat-conducting copper pipe are bonded as one by described heat conduction glue-line.
Beneficial effect of the present invention is: adopt optical cement layer, guide-lighting glass, heat conduction glue-line, heat-conducting copper pipe, fin, temperature sensor to encapsulate pumping coupler, package casing can dispel the heat effectively to pumping coupler, simultaneously by the working temperature of temperature sensor monitors pumping coupler, can in fiber laser steady operation for a long time.By temperature sensor and temperature controller, can work long-term and stably in hectowatt grade fiber laser, be particularly useful for the environment that factory's whole day is uninterruptedly produced.
Accompanying drawing explanation
Fig. 1 is a kind of pumping coupler structural representation for hectowatt grade fiber laser of the present invention;
Fig. 2 is for leaking pumping index path in the coupled zone of pumping coupler shown in Fig. 1;
Fig. 3 is fiber laser temperature monitoring system structural representation.
In figure: 1, pumping optical fiber, 2, main fiber, 3, surrounding layer, 4, inner cladding, 5, fibre core, 6, optical cement layer, 7, guide-lighting glass, 8, heat conduction glue-line, 9, heat-conducting copper pipe, 10, fin, 11, temperature sensor, 12, temperature controller, 13, power-supply controller of electric, 14, pumping source.
Embodiment
As Figure 1-3, a kind of pumping coupler for hectowatt grade fiber laser of the embodiment of the present invention, the surrounding layer 3 of main fiber 2 coupled zone part is divested and is cleaned out, and pumping optical fiber 1 is fused on the inner cladding 4 of main fiber 2 from the side.When pump light is transferred to coupled zone in pumping optical fiber 1, due to the effect of evanescent wave, the light field in pumping optical fiber 1 and main fiber 2 is coupled, and coupling pump light enters in main fiber 1 to transmit.Because pumping optical fiber 1 is different from the diameter of main fiber 2, be asymmetric waveguides, pump light can not be coupled in main fiber 2 completely.The pump light revealed can spread in guide-lighting glass 7 in space, or spread in optical cement layer 6 in space, or spread in the surrounding layer 3 of main fiber in space, even if be coupled into the pump light in main fiber 2, also have part and can again enter into surrounding layer 3 because not meeting the total reflection condition of main fiber 2.The coat 3 of main fiber and guide-lighting glass 7 are bonded as one by optical cement layer 6, refractive index due to guide-lighting glass 7 and optical cement layer 6 is greater than the refractive index of coat 3, pump light in coat 3 and optical cement layer 6, C, D finally can enter into guide-lighting glass 7, so optical cement layer 6 can divest the pump light of transmission in coat 3.Guide-lighting glass 7 area is large, and ability of being heated, higher than optical cement layer 6, can bear the leakage pump light that power is very high.Guide-lighting glass 7 and heat-conducting copper pipe 9 are bonded as one by heat conduction glue-line 8, and heat conduction glue-line 8 one aspect can absorb the pump light in guide-lighting glass 7, the heat of absorption can be passed to heat-conducting copper pipe 9 on the other hand.The outer surface of guide-lighting glass 7, through frosted process, can carry out diffuse reflection to the pump light divested on the one hand, accelerate its dissipative velocity, increases the contact area with heat conduction glue-line 8 on the other hand, more heat is passed to heat-conducting copper pipe 9.There is fin 10 outside heat-conducting copper pipe 9, scattering and disappearing of heat can be accelerated, under indoor environment, keep pumping coupler to be still in constant temperature operating state when working long hours.Temperature sensor 11 is embedded with in heat-conducting copper pipe 9, can the working temperature of Real-Time Monitoring pumping coupler.When working temperature exceedes threshold value; temperature sensor 11 sends signal to temperature controller 12; make power-supply controller of electric 13 close the pumping source 14 of the too high pumping coupler of working temperature, thus protect this pumping coupler from damage, whole fiber laser is worked on.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. for a pumping coupler for hectowatt grade fiber laser, it is characterized in that, comprising:
Package casing, imports pumping optical fiber (1) and main fiber (2) in described package casing inside;
Described package casing comprises optical cement layer (6), guide-lighting glass (7) is had in described optical cement layer (6) outer wrap, described guide-lighting glass (7) outer wrap has heat conduction glue-line (8), it is outside that heat-conducting copper pipe (9) is sleeved on described heat conduction glue-line (8), fin (10) is distributed in described heat-conducting copper pipe (9) around, it is inner that temperature sensor (11) is embedded in described heat conduction copper sheathing (9), and temperature controller (12) is connected with described temperature sensor (11).
2. the pumping coupler for hectowatt grade fiber laser according to claim 1, it is characterized in that: described pumping optical fiber (1) comprises fibre core, have covering in described fibre core outer wrap, described covering outer wrap has for the coat not by environmental damage.
3. the pumping coupler for hectowatt grade fiber laser according to claim 2, is characterized in that: described fiber core refractive index is greater than described cladding index.
4. the pumping coupler for hectowatt grade fiber laser according to claim 1, it is characterized in that: described main fiber (2) comprises fibre core (5), have inner cladding (4) in described fibre core (5) outer wrap, it is outside that surrounding layer (3) is wrapped in described inner cladding (4).
5. the pumping coupler for hectowatt grade fiber laser according to claim 4, is characterized in that: described inner cladding (4) refractive index is greater than described surrounding layer (3) refractive index.
6. the pumping coupler for hectowatt grade fiber laser according to claim 4, is characterized in that: glass (7) guide-lighting described in both sides and described surrounding layer (3) are bonded as one by described optical cement layer (6).
7. the pumping coupler for hectowatt grade fiber laser according to claim 6, is characterized in that: described optical cement layer (6) and described guide-lighting glass (7) refractive index are greater than described surrounding layer (3) refractive index.
8. the pumping coupler for hectowatt grade fiber laser according to claim 7, is characterized in that: described guide-lighting glass (7) outer surface frosted process.
9. the pumping coupler for hectowatt grade fiber laser according to claim 1, is characterized in that: glass (7) guide-lighting described in both sides and described heat-conducting copper pipe (9) are bonded as one by described heat conduction glue-line (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802602.3A CN105244737A (en) | 2015-11-19 | 2015-11-19 | Pump coupler for hectowatt fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802602.3A CN105244737A (en) | 2015-11-19 | 2015-11-19 | Pump coupler for hectowatt fiber laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105244737A true CN105244737A (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510802602.3A Pending CN105244737A (en) | 2015-11-19 | 2015-11-19 | Pump coupler for hectowatt fiber laser |
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| CN (1) | CN105244737A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785838A (en) * | 2016-12-16 | 2017-05-31 | 武汉锐科光纤激光技术股份有限公司 | Portable hand-held 80W jointed fiber Optical Maser Systems |
| CN108336635A (en) * | 2018-01-22 | 2018-07-27 | 北京凯普林光电科技股份有限公司 | A kind of high power cladding light stripper |
-
2015
- 2015-11-19 CN CN201510802602.3A patent/CN105244737A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785838A (en) * | 2016-12-16 | 2017-05-31 | 武汉锐科光纤激光技术股份有限公司 | Portable hand-held 80W jointed fiber Optical Maser Systems |
| CN108336635A (en) * | 2018-01-22 | 2018-07-27 | 北京凯普林光电科技股份有限公司 | A kind of high power cladding light stripper |
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Application publication date: 20160113 |