CN105244736B - A kind of pumping coupler for kilowatt level optical fiber laser - Google Patents
A kind of pumping coupler for kilowatt level optical fiber laser Download PDFInfo
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- CN105244736B CN105244736B CN201510802585.3A CN201510802585A CN105244736B CN 105244736 B CN105244736 B CN 105244736B CN 201510802585 A CN201510802585 A CN 201510802585A CN 105244736 B CN105244736 B CN 105244736B
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Abstract
The invention discloses a kind of pumping coupler for kilowatt level optical fiber laser, including：Pumping optical fiber, main fiber and package casing；Pumping optical fiber is connected on main fiber, and package casing is set at the access point of pumping optical fiber and main fiber；Package casing includes external copper pipe, heat-conducting copper pipe and light guide glass layer；External copper pipe is coaxially set on the outside of heat-conducting copper pipe；Water pipe is installed in the cavity that external copper pipe and heat-conducting copper pipe are formed；Heat-conducting copper pipe inner wall is equipped with light guide glass layer；At the port of heat-conducting copper pipe, optical adhesive layer is equipped between light guide glass layer and main fiber, access point is sealed in the cavity of heat-conducting copper pipe.Pumping coupler disclosed by the invention can be used in kilowatt level optical fiber laser, and manufacture difficulty is small, and production cost is low；It can long-term and stably work in kilowatt level optical fiber laser simultaneously, be particularly suitable for the environment that factory's whole day uninterruptedly produces.
Description
Technical field
The present invention relates to laser technology field more particularly to a kind of pumping couplers for kilowatt level optical fiber laser.
Background technology
Optical fiber laser is with its good beam quality, high conversion efficiency, pumping threshold are low, perfect heat-dissipating, small weight
It is light to wait significant advantages, by the extensive concern of various countries researcher, development at full speed has been obtained in recent years.Particularly high power light
Fibre laser with its remarkable beam quality, the stability of superelevation, easy application method and it is really non-maintaining the advantages that,
Become the representative of third generation laser technology, the fields such as automobile, aircraft, shipbuilding are widely used in by people, as covering is cut
It cuts, steel plate welds, part reparation.Pumping coupler is the key passive optical device of optical fiber laser, it is by multirouting semiconductor
The coupling pump light that laser generates provides required pumping light power for optical fiber laser into main fiber.Its operation principle
When being that light transmits in a fiber, most of energy is concentrated in fibre core, and only a small part is transmitted in covering.When two optical fiber
The distance between it is near enough when, due to the effect of evanescent wave, the light field in two optical fiber couples, so as to influence in optical fiber
The distribution of former light field.
Since pumping coupler is in consequence in optical fiber laser, the development of pumping coupler in recent years is
As the research hotspot of countries in the world field of high power fiber lasers researcher, and there is ripe pumping coupler
With high-capacity optical fiber laser product, there have been the report of 2kW, 4kW and 10kW optical fiber laser in IPG companies, disclosed in
Coupler is only used for the specific optical fiber laser of IPG companies, due to being suitable for the pumping coupler of high-capacity optical fiber laser
Technical parameter index is all very high, this is just to the required precision of production technology height, and manufacture difficulty is big, and production cost is high；
Domestic matured product at present is also rarely found, relies on import mostly, needs the optical fiber laser of an import full set, it is impossible to
It is individually replaced pumping coupler；Meanwhile existing pumping coupler sets a metal shell in fiber coupling area, at work
Due to be easy to causeing the raising of pumping coupler temperature in the leakage of coupled zone pump light, hold when temperature increases to a certain extent
Easily cause pumping source damage；It cannot be guaranteed that prolonged constant temperature work, is susceptible to failure in the continual production of factory, drops
Low production efficiency；Therefore, research is a kind of can be individually replaced pumping coupler, can be protected simultaneously available for kilowatt level optical fiber laser
The pumping coupler of card long-time constant temperature work becomes particularly significant.
Invention content
Shortcoming present in regarding to the issue above, the present invention provide a kind of pumping for kilowatt level optical fiber laser
Coupler.
To achieve the above object, the present invention provides a kind of pumping coupler for kilowatt level optical fiber laser, including：Pump
Pu optical fiber, main fiber and package casing；
The pumping optical fiber is connected on the main fiber, and setting encapsulation is outer at the access point of pumping optical fiber and main fiber
Shell；
The package casing includes external copper pipe, heat-conducting copper pipe and light guide glass layer；The external copper pipe is coaxially set on institute
State the outside of heat-conducting copper pipe；Water pipe is installed in the cavity that the external copper pipe and heat-conducting copper pipe are formed；The heat-conducting copper pipe inner wall
It is equipped with light guide glass layer；
The main fiber runs through the cavity of the heat-conducting copper pipe, and described access point is located in the cavity of the heat-conducting copper pipe；
At the port of the heat-conducting copper pipe, optical adhesive layer is equipped between the light guide glass layer and the main fiber, it will
Access point is sealed in the cavity of heat-conducting copper pipe.
As a further improvement on the present invention, the heat-conducting copper pipe is embedded with temperature sensor, the temperature sensor with
Temperature controller is connected, and the temperature controller is connected with power-supply controller of electric, and the power-supply controller of electric is connected with pumping source.
As a further improvement on the present invention, the pumping optical fiber includes pumping optical fiber fibre core, pumping optical fiber fibre core outside
It is coated with covering and coat successively；The refractive index of the pumping optical fiber fibre core is more than the refractive index of pumping optical fiber covering.
As a further improvement on the present invention, the main fiber includes main fiber fibre core, is wrapped successively on the outside of main fiber fibre core
It is covered with inner cladding and surrounding layer；The refractive index of the main fiber fibre core is more than the refractive index of main fiber inner cladding, is wrapped in main fiber
The refractive index of layer is more than the refractive index of main fiber surrounding layer.
As a further improvement on the present invention, the refractive index of the light guide glass layer is not less than the refractive index of optical adhesive layer,
The refractive index of the optical adhesive layer is more than the refractive index of main fiber surrounding layer.
As a further improvement on the present invention, heat-conducting glue layer is equipped between the heat-conducting copper pipe and the light guide glass layer.
As a further improvement on the present invention, what is be in contact on the light guide glass layer with heat-conducting glue layer does at frosted on one side
Reason.
Compared with prior art, beneficial effects of the present invention are：
A kind of pumping coupler for kilowatt level optical fiber laser disclosed by the invention, by pumping optical fiber and key light
Package casing is set at fine access point, and the pump light of leakage can be imported into light guide glass layer, and will be hot by package casing
Amount is transmitted in heat-conducting copper pipe, is passed through cooling water in the water pipe between heat-conducting copper pipe and external copper pipe, cooling water can be taken away and lead
The heat of hot copper pipe accelerates heat and scatters and disappears, and ensures that pumping coupler is still in constant temperature working condition when working long hours；It adopts
Conductive heat transfer copper pipe heat is carried out with cooling water, cooling effect is more preferable, and pumping coupler of the present invention can be used for multikilowatt
In optical fiber laser, manufacture difficulty is small, and production cost is low；It simultaneously can be in kilowatt level optical fiber laser long-term and stably
Work, is particularly suitable for the environment that factory's whole day uninterruptedly produces；
Temperature sensor, temperature controller and power-supply controller of electric constitute temperature control system, are embedded in heat-conducting copper pipe
Temperature sensor can monitor the temperature of pumping coupler in real time, when operating temperature is more than threshold value, temperature sensor is to temperature
Degree controller sends out signal so that power-supply controller of electric closes the pumping source of the excessively high pumping coupler of operating temperature, so as to ensure this
Pumping coupler is against damages, and entire optical fiber laser is enable to work on；
Heat-conducting glue layer is equipped between heat-conducting copper pipe and light guide glass layer, on the one hand heat-conducting glue layer can absorb light guide glass layer
In pump light, on the other hand can be by the heat transfer of absorption to heat-conducting copper pipe；
The one side being in contact on light guide glass layer with heat-conducting glue layer is handled by frosted, pumping that on the one hand can be to divesting
Light carries out diffusing reflection, accelerates its depletion rate；On the other hand the contact area with heat-conducting glue layer is increased, it can be by more heats
Pass to heat-conducting copper pipe.
Description of the drawings
Fig. 1 is the structure chart of the disclosed pumping coupler for kilowatt level optical fiber laser of an embodiment of the present invention；
Fig. 2 is that the coupled zone of the disclosed pumping coupler for kilowatt level optical fiber laser of an embodiment of the present invention is let out
Dew pumping index path；
Fig. 3 is the structure chart of optical fiber laser temperature monitoring system disclosed in an embodiment of the present invention.
In figure：1st, pumping optical fiber；2nd, main fiber；3rd, main fiber surrounding layer；4th, main fiber inner cladding；5th, main fiber fibre core；
6th, optical adhesive layer；7th, light guide glass layer；8th, heat-conducting glue layer；9th, heat-conducting copper pipe；10th, external copper pipe；11st, water pipe；12nd, temperature sensing
Device；13rd, temperature controller；14th, power-supply controller of electric；15th, pumping source.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Pumping coupler technical parameter of the pumping coupler disclosed in IPG companies due to being suitable for high-capacity optical fiber laser
Index is all very high, this just to the required precision of production technology height, manufacture difficulty is big, and domestic matured product is also rarely found, mostly according to
Rely import, expensive, foreign countries will appreciate that the also few of this technology, and producer possesses the patent of oneself more, and technique is stringent
Secrecy, although the pumping coupler coupling efficiency that IPG is developed has had reached higher level, and available for multikilowatt optical fiber
Laser, but the encapsulating structure of pumping coupler is not had been reported that.
The present invention provides a kind of pumping coupler for kilowatt level optical fiber laser, including：Pumping optical fiber, main fiber and
Package casing；Pumping optical fiber is connected on main fiber, and package casing is set at the access point of pumping optical fiber and main fiber；Encapsulation
Shell includes external copper pipe, heat-conducting copper pipe and light guide glass layer；External copper pipe is coaxially set on the outside of heat-conducting copper pipe；External copper pipe
Water pipe is installed in the cavity formed with heat-conducting copper pipe；Heat-conducting copper pipe inner wall is equipped with light guide glass layer；It is connected with pumping optical fiber
Main fiber runs through the cavity of heat-conducting copper pipe, and the access point on main fiber is located in the cavity of heat-conducting copper pipe；At the end of heat-conducting copper pipe
At mouthful, optical adhesive layer is equipped between light guide glass layer and main fiber, access point is sealed in the cavity of heat-conducting copper pipe.Conduction copper
Pipe is embedded with temperature sensor, and temperature sensor is connected with temperature controller, and temperature controller is connected with power-supply controller of electric, power supply
Controller is connected with pumping source.
1-3 is described in further detail the present invention below in conjunction with the accompanying drawings：
As shown in Figures 1 to 3：A kind of pumping coupler for kilowatt level optical fiber laser of the present invention, including：Pump
Pu optical fiber 1, main fiber 2 and package casing；
Package casing includes external copper pipe 10, heat-conducting copper pipe 9 and light guide glass layer 7；External copper pipe 10 is same to be located in heat conduction
The outside of copper pipe 9；Water pipe 11 is installed in the cavity that external copper pipe 10 and heat-conducting copper pipe 9 are formed, cooling water, water are passed through in water pipe 11
The structure of pipe 11 can select suitable structure according to heat dissipation effect；It is fixed with and led by heat-conducting glue layer 8 on 9 inner wall of heat-conducting copper pipe
Light glassy layer 7；Pumping optical fiber 1 is connected on main fiber 2, and the main fiber 2 for being connected with pumping optical fiber 1 runs through the cavity of heat-conducting copper pipe 9,
Pumping optical fiber 1 and the access point of main fiber 2 is wherein made to be located in the cavity of heat-conducting copper pipe 9；At the port of heat-conducting copper pipe 9, lead
Optical adhesive layer 6 is equipped between light glassy layer 7 and main fiber 1, access point is sealed in the cavity of heat-conducting copper pipe 9 by optical cement
It is interior.
Pumping optical fiber 1 includes pumping optical fiber fibre core, and covering and coat are coated with successively on the outside of pumping optical fiber fibre core；Pumping
The refractive index of fiber core is more than the refractive index of pumping optical fiber covering；Pump light is in pumping optical fiber fibre core according to total reflection principle
Transmission；Pumping optical fiber coat plays the role of protecting covering, from environmental damage.Main fiber 2 includes main fiber fibre core 5, main
5 outside of fiber core is coated with main fiber inner cladding 4 and main fiber surrounding layer 3 successively；The refractive index of main fiber fibre core 5 is more than master
The refractive index 4 of optical fiber inner cladding, the refractive index of main fiber inner cladding 4 are more than the refractive index of main fiber surrounding layer 3.By main fiber 2
Surrounding layer 3 is divested and is cleaned out, and pumping optical fiber 1 is fused to from side on the inner cladding 4 of main fiber 2, is formed at access point
Coupled zone；When pump light is transferred to coupled zone in pumping optical fiber 1, due to the effect of evanescent wave, pumping optical fiber 1 and main fiber
Light field in 2 couples, and coupling pump light is into transmitting in main fiber 1.Since pumping optical fiber 1 is different from the diameter of main fiber 2,
It is asymmetric waveguides, pump light cannot be completely coupled into main fiber 2；The pump light A of leakage can be traveled into space
In light guide glass layer 7, the pump light B of leakage is traveled into space in optical adhesive layer 6, and the pump light C of leakage is in space
In travel into the surrounding layer 3 of main fiber, even if being coupled into the pump light in main fiber 2, also have let out part dew pump
Pu light D can be re-introduced into surrounding layer 3 when not meeting the total reflection condition of main fiber 2.
Main fiber surrounding layer 3 and light guide glass layer 7 are cohered and are integrated by optical adhesive layer 6, due to the refraction of light guide glass layer 7
Rate is not less than the refractive index of optical adhesive layer 6, and the refractive index of optical adhesive layer 6 is more than the refractive index of main fiber surrounding layer 3；Outside main fiber
Pump light B, C, D in covering 3 and optical adhesive layer 6 are eventually entered in light guide glass layer 7, so optical adhesive layer 6 can shell
Except the pump light transmitted in main fiber surrounding layer 3 and finally through in light guide glass layer 7.7 area of light guide glass layer is big, is heated
Ability is higher than optical adhesive layer 6, can bear the very high leakage pump light of power.
Light guide glass layer 7 and heat-conducting copper pipe 9 are cohered and are integrated by heat-conducting glue layer 8, and 8 one side of heat-conducting glue layer, which can absorb, to be led
Pump light in light glassy layer 7, on the other hand can be by the heat transfer of absorption to heat-conducting copper pipe 9.The appearance of light guide glass layer 7
Face is handled by frosted, on the one hand can be carried out diffusing reflection to the pump light divested, be accelerated its dissipative velocity, on the other hand increase
With the contact area of heat-conducting glue layer 8, by more heat transfers to heat-conducting copper pipe 9.Heat-conducting copper pipe 9 forms interior with external copper pipe 10
Cooling water is passed through in water pipe in chamber, the cooling water of flowing can take away the heat of heat-conducting copper pipe 9, in optical fiber laser closed-loop
Pumping coupler can still be kept to be in constant temperature working condition when working long hours under border.
Embedded with temperature sensor 12 in heat-conducting copper pipe 9, the operating temperature of pumping coupler can be monitored in real time.When work temperature
When degree is more than threshold value, temperature sensor 12 sends out signal to temperature controller 13；Temperature controller 13 is into power-supply controller of electric 14
Send out instruction so that power-supply controller of electric 14 closes the pumping source 15 of the excessively high pumping coupler of operating temperature, so as to protect the pumping
Coupler is against damages, and entire optical fiber laser is made to can continue to work.
A kind of pumping coupler for kilowatt level optical fiber laser of the present invention passes through heat-conducting copper pipe, cooling water-cooled
And temperature control system, it can long-term and stably work in kilowatt level optical fiber laser, it is complete to be particularly suitable for factory
Its environment uninterruptedly produced；Meanwhile manufacture difficulty is small, production cost is low, can directly replace in optical fiber laser.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification for all within the spirits and principles of the present invention, being made,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of pumping coupler for kilowatt level optical fiber laser, which is characterized in that including：Pumping optical fiber, main fiber and
Package casing；
The pumping optical fiber is connected on the main fiber, and package casing is set at the access point of pumping optical fiber and main fiber；
The package casing includes external copper pipe, heat-conducting copper pipe and light guide glass layer；The external copper pipe is coaxially set on described lead
The outside of hot copper pipe；Water pipe is installed in the cavity that the external copper pipe and heat-conducting copper pipe are formed；It is set on the heat-conducting copper pipe inner wall
There is light guide glass layer；
The main fiber runs through the cavity of the heat-conducting copper pipe, and described access point is located in the cavity of the heat-conducting copper pipe；
At the port of the heat-conducting copper pipe, optical adhesive layer is equipped between the light guide glass layer and the main fiber, will be accessed
Dot encapsulation is in the cavity of heat-conducting copper pipe.
2. it to be used for the pumping coupler of kilowatt level optical fiber laser as described in claim 1, which is characterized in that the conduction copper
Pipe is embedded with temperature sensor, and the temperature sensor is connected with temperature controller, the temperature controller and power-supply controller of electric
It is connected, the power-supply controller of electric is connected with pumping source.
3. it to be used for the pumping coupler of kilowatt level optical fiber laser as described in claim 1, which is characterized in that the pump light
Fibre includes pumping optical fiber fibre core, and covering and coat are coated with successively on the outside of pumping optical fiber fibre core；The pumping optical fiber fibre core
Refractive index is more than the refractive index of pumping optical fiber covering.
4. it to be used for the pumping coupler of kilowatt level optical fiber laser as described in claim 1, which is characterized in that the main fiber
Including main fiber fibre core, it is coated with inner cladding and surrounding layer successively on the outside of main fiber fibre core；The refractive index of the main fiber fibre core
More than the refractive index of main fiber inner cladding, the refractive index of main fiber inner cladding is more than the refractive index of main fiber surrounding layer.
5. it to be used for the pumping coupler of kilowatt level optical fiber laser as claimed in claim 4, which is characterized in that the leaded light glass
The refractive index of glass layer is not less than the refractive index of optical adhesive layer, and the refractive index of the optical adhesive layer is more than the refraction of main fiber surrounding layer
Rate.
6. it to be used for the pumping coupler of kilowatt level optical fiber laser as described in claim 1, which is characterized in that the conduction copper
Heat-conducting glue layer is equipped between pipe and the light guide glass layer.
7. it to be used for the pumping coupler of kilowatt level optical fiber laser as claimed in claim 6, which is characterized in that the leaded light glass
What is be in contact on glass layer with heat-conducting glue layer does frosted processing on one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802585.3A CN105244736B (en) | 2015-11-19 | 2015-11-19 | A kind of pumping coupler for kilowatt level optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802585.3A CN105244736B (en) | 2015-11-19 | 2015-11-19 | A kind of pumping coupler for kilowatt level optical fiber laser |
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| Publication Number | Publication Date |
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| CN105244736A CN105244736A (en) | 2016-01-13 |
| CN105244736B true CN105244736B (en) | 2018-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510802585.3A Active CN105244736B (en) | 2015-11-19 | 2015-11-19 | A kind of pumping coupler for kilowatt level optical fiber laser |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233157A (en) * | 2018-02-12 | 2018-06-29 | 天津欧泰激光科技有限公司 | Ultra high power fiber coupler cooling module structure |
| CN110768091B (en) * | 2019-11-01 | 2020-11-06 | 佛山市鼎科科技发展有限公司 | High-efficiency optical fiber laser pumping coupler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081190A (en) * | 2010-12-10 | 2011-06-01 | 中国科学院上海光学精密机械研究所 | Double-clad laser fiber and laser coupling method adopting same |
| CN102902028A (en) * | 2011-07-29 | 2013-01-30 | 山西飞虹激光科技有限公司 | Energy transfer optical cable with temperature monitoring function |
| WO2014129023A1 (en) * | 2013-02-21 | 2014-08-28 | 株式会社フジクラ | Leaked light removing component, combiner, optical amplifier, and fiber laser apparatus |
| CN104037598A (en) * | 2014-06-17 | 2014-09-10 | 中国人民解放军国防科学技术大学 | Efficient cooling method for high-power optical fibre |
-
2015
- 2015-11-19 CN CN201510802585.3A patent/CN105244736B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081190A (en) * | 2010-12-10 | 2011-06-01 | 中国科学院上海光学精密机械研究所 | Double-clad laser fiber and laser coupling method adopting same |
| CN102902028A (en) * | 2011-07-29 | 2013-01-30 | 山西飞虹激光科技有限公司 | Energy transfer optical cable with temperature monitoring function |
| WO2014129023A1 (en) * | 2013-02-21 | 2014-08-28 | 株式会社フジクラ | Leaked light removing component, combiner, optical amplifier, and fiber laser apparatus |
| CN104037598A (en) * | 2014-06-17 | 2014-09-10 | 中国人民解放军国防科学技术大学 | Efficient cooling method for high-power optical fibre |
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