CN105428974B - A kind of fibre cladding light filtering method using glass powder - Google Patents
A kind of fibre cladding light filtering method using glass powder Download PDFInfo
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- CN105428974B CN105428974B CN201510868818.XA CN201510868818A CN105428974B CN 105428974 B CN105428974 B CN 105428974B CN 201510868818 A CN201510868818 A CN 201510868818A CN 105428974 B CN105428974 B CN 105428974B
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Abstract
The invention discloses a kind of fibre cladding light filtering methods using glass powder, it is characterised in that: the optical fiber of cladding light to be filtered out is stripped one section to inner cladding is exposed first, the inner cladding is placed in the groove of Metal Packaging block；Then the groove is filled up and the inner cladding is embedded in cryogenic glass powder with cryogenic glass powder and be compacted, cryogenic glass powder is heated to sintering temperature, cryogenic glass powder is set to be frozen into the glassy layer that refractive index is greater than inner cladding, the glassy layer is wrapped in outside the inner cladding and combines closely to form one with the groove；The both ends of the optical fiber of the cladding light to be filtered out are fixed on to the both ends of the groove again, finally the fixed metal cover board for covering groove on the Metal Packaging block.Fibre cladding light filtering method provided by the invention using glass powder, can be by covering light-output remaining in optical fiber, not accumulated heat, rapid heat dissipation, and will not reduce the signal laser power of fiber core.
Description
Technical field
The present invention relates to a kind of filtering method of fibre cladding light more particularly to a kind of fibre cladding light using glass powder
Filtering method.
Background technique
With the development of high-capacity optical fiber laser, the output power of optical fiber laser is constantly promoted.The filter of fibre cladding light
Except method is important technology needed for developing high-capacity optical fiber laser, optical fiber laser output laser is can be improved in this method
Beam quality, laser brightness and performance reliability.The main method that fibre cladding light strips at present is by doubly clad optical fiber
Inner cladding outside a refractive index matching layers are set or using other physics, chemical means by inner cladding surface roughening, destroy
The total reflection condition of pump light and covering laser in the inner cladding of doubly clad optical fiber, thus by these light-output inner claddings, so
This section of optical fiber by heat sink heat dissipation or is sealed in water flowing cooling in metal shell afterwards.But the major defect of the above method is:
1, since current most products use colloid refractive index matching layers, for the light wave that filters out of needs with
Certain absorption, causes matching layer the phenomenon that heating burnout occur.
2, it being contacted due to refractive index matching layers with lighttight radiator, derived cladding light is quickly converted to heat,
It will cause the raising of optical fiber local temperature.As the covering optical power for needing to strip increases, optical fiber cannot be effectively reduced in radiator
Temperature, will lead to optical fiber brittle failure, coat burning the problems such as appearance.
3, by after the surface roughening of optical fiber, not only the mechanical strength of optical fiber is reduced, but also since the inner cladding of optical fiber is long
Phase is exposed in external environment, can reduce the reliability and service life of optical fiber.
Therefore, in order to solve the major defect in the above method, it is necessary to provide a kind of new fibre cladding light side of filtering out
Method.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of fibre cladding light filtering methods using glass powder, will wrap
In layer light-output to glassy layer, and heat is converted to by Metal Packaging and is fully absorbed by radiator, optical fiber can not be reduced
Signal laser power in fibre core, and not accumulated heat, rapid heat dissipation.
The present invention is to solve above-mentioned technical problem and the technical solution adopted is that provide a kind of optical fiber packet using glass powder
Layer light filtering method, which comprises the steps of:
A) optical fiber of cladding light to be filtered out is stripped one section to inner cladding is exposed, the inner cladding is placed in Metal Packaging
In the groove of block；
B) groove is filled up and the inner cladding is embedded in cryogenic glass powder with cryogenic glass powder and be compacted, heated low
Warm glass powder is to sintering temperature；
C) cryogenic glass powder after the completion of being sintered is frozen into the glassy layer that refractive index is greater than inner cladding, the glassy layer package
It combines closely to form one in outside the inner cladding and with the groove；
D) both ends of the optical fiber of the cladding light to be filtered out are fixed on to the both ends of the groove, and in the Metal Packaging
The metal cover board of fixed covering groove is packaged on block.
Further, the groove is first heated in the step b) to glass transition temperature, cryogenic glass powder is then added will
The groove fills up and the inner cladding is embedded in cryogenic glass powder and is compacted, and is again heated to sintering temperature.
Further, institute is fixed on using optical gel in the both ends of the optical fiber of the cladding light to be filtered out by the step d)
State the both ends of groove.
It further, further include that step e) cools down the metal shell of the Metal Packaging block (2) with the transmission that dissipates
The heat that light generates.
The present invention comparison prior art has following the utility model has the advantages that a kind of optical fiber packet using glass powder provided by the invention
Layer light filtering method has the characteristics that not accumulated heat, rapid heat dissipation, can be pump light remaining in fibre cladding, amplified spontaneous emission
It light, higher order mode signal and is exported in glassy layer from the inner cladding of optical fiber from the light that exit end reflects, it is then derived
Light has been converted to heat when being incident on the interface of solid glass layer and Metal Packaging, and is converted to heat by Metal Packaging
It is fully absorbed by radiator, avoids the raising of temperature, tolerance laser power can be improved, and laser signal will not be generated
Self-excitation, or reduce the signal laser power in fiber core.
The present invention can be widely applied in various high-capacity optical fiber lasers and amplifier.
Detailed description of the invention
Fig. 1 is the structure diagram that the present invention is prepared using the fibre cladding light filtering method of glass powder；
Fig. 2 is that the present invention utilizes the covering light transmission path schematic diagram in the fibre cladding light filtering method of glass powder.
In figure:
1: the optical fiber 10 of cladding light to be filtered out: inner cladding 11: fibre core
2: Metal Packaging block 20: groove 21: metal cover board 3: glassy layer
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structure diagram that the present invention is prepared using the fibre cladding light filtering method of glass powder；
Fig. 2 is that the present invention utilizes the covering light transmission path schematic diagram in the fibre cladding light filtering method of glass powder.
Referring to Figure 1, a kind of fibre cladding light filtering method using glass powder provided by the invention, including walk as follows
It is rapid: no matter optical fiber is double clad, triple clad either multi-clad, the optical fiber 1 of cladding light to be filtered out being stripped one section first
To inner cladding 10 is exposed, then only the inner cladding 10 exposed is placed in the groove 20 of Metal Packaging block 2, while using low temperature
Groove 20 is filled up and the inner cladding 10 exposed is embedded in cryogenic glass powder and is compacted by glass powder, reheats cryogenic glass powder
To sintering temperature (its sintering temperature of the glass powder of different model is different), it is sintered cryogenic glass powder.The present embodiment uses
Cryogenic glass powder, be it is a kind of can not higher than 500 degrees Celsius at a temperature of sinter the solid that refractive index is greater than inner cladding into
The powder of glassy layer.Cryogenic glass powder after the completion of sintering is frozen into the glassy layer 3 that refractive index is greater than inner cladding 10, glassy layer 3
It is wrapped in outside inner cladding 10 and Metal Packaging, inner cladding 10 and sintered glassy layer 3 combines closely to form one；Finally use
Optical gel, such as 353ND are fixed on the both ends of the optical fiber 1 of cladding light to be filtered out at 20 both ends of groove of Metal Packaging block 2,
And metal cover board 21 is fixed on Metal Packaging block 20 and is packaged with covering whole groove 20.
After the inner cladding 10 exposed is placed in the groove 20 of Metal Packaging block 2, cryogenic glass powder is heated, can also be had
Another method: glass transition temperature (its glass transition temperature of the glass powder of different model of groove 20 to cryogenic glass powder is first heated
It is different), make cryogenic glass powder that there is mobility, continuously adds cryogenic glass powder into the groove 20 of Metal Packaging block 2 again at this time,
To avoid because cryogenic glass powder volume-diminished caused by sintering forms gap, it is further heated up to sintering temperatures after the completion of addition
It is sintered.
Specifically, the fibre core 11 of the optical fiber 1 of cladding light to be filtered out is located in inner cladding 10, constituted about with inner cladding 10
The waveguiding structure that beam laser signal is propagated.Fig. 2 is referred to, the direction of fibre cladding optical transport from left to right, is sintered after solidifying
Cryogenic glass powder forms a refractive index and is wrapped in optical fiber inner cladding greater than the solid glass layer 3 of 10 refractive index of optical fiber inner cladding
Except 10, void-free connection is formed.Signal light transmits in fibre core 11, and remaining pump light, amplified spontaneous emission light, height
The light of rank mode signal transmits in optical fiber inner cladding 10 and forms cladding light, and this layer of solid glass layer 3 destroys cladding light
Total reflection condition so that cladding light has been imported among this layer of solid glass layer 3.When light is incident on solid glass layer 3 and gold
It is converted to heat when belonging to the interface of package blocks 2, these heats are conducted by Metal Packaging block 2 to radiator.
Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill
Art personnel, without departing from the spirit and scope of the present invention, when can make a little modification and perfect therefore of the invention protection model
It encloses to work as and subject to the definition of the claims.
Claims (3)
1. a kind of fibre cladding light filtering method using glass powder, which comprises the steps of:
A) optical fiber (1) of cladding light to be filtered out is stripped one section to inner cladding (10) are exposed, the inner cladding (10) is placed in
In the groove (20) of Metal Packaging block (2)；
B) groove (20) is first heated to glass transition temperature, and then the groove (20) is filled up and will by addition cryogenic glass powder
Compacting in inner cladding (10) the embedment cryogenic glass powder, is again heated to sintering temperature；The sintering temperature of the cryogenic glass powder
Not higher than 500 degrees Celsius；
C) cryogenic glass powder after the completion of being sintered is frozen into the glassy layer (3) that refractive index is greater than inner cladding, glassy layer (3) packet
It is wrapped in the inner cladding (10) outside and combines closely to form one with the groove (20)；
D) both ends of the optical fiber (1) of the cladding light to be filtered out are fixed on to the both ends of the groove (20), and in the metal
The metal cover board (21) of fixed covering groove (20) is packaged in package blocks (2).
2. a kind of fibre cladding light filtering method using glass powder described in accordance with the claim 1, which is characterized in that the step
The rapid both ends that the both ends of the optical fiber (1) of the cladding light to be filtered out d) are fixed on to using optical gel the groove (20).
3. a kind of fibre cladding light filtering method using glass powder described in accordance with the claim 1, which is characterized in that further include
Step e) cools down the metal shell of the Metal Packaging block (2) with the heat for transmitting light generation that dissipates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510868818.XA CN105428974B (en) | 2015-12-01 | 2015-12-01 | A kind of fibre cladding light filtering method using glass powder |
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| CN201510868818.XA CN105428974B (en) | 2015-12-01 | 2015-12-01 | A kind of fibre cladding light filtering method using glass powder |
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| CN105428974A CN105428974A (en) | 2016-03-23 |
| CN105428974B true CN105428974B (en) | 2019-03-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290823A (en) * | 2016-04-01 | 2017-10-24 | 中国兵器装备研究院 | A kind of manufacture method of cladding light stripper |
| CN107482426A (en) * | 2016-06-08 | 2017-12-15 | 广东量泽激光技术有限公司 | Pump light leakage device and optical fiber laser |
| CN107272124B (en) * | 2017-07-19 | 2019-03-19 | 深圳市创鑫激光股份有限公司 | A kind of the cladding light stripper and production method of high-power laser optical fiber |
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| CN1283277A (en) * | 1997-07-31 | 2001-02-07 | 康宁股份有限公司 | Optical device and fusion seal |
| US7306376B2 (en) * | 2006-01-23 | 2007-12-11 | Electro-Optics Technology, Inc. | Monolithic mode stripping fiber ferrule/collimator and method of making same |
| CN101718916A (en) * | 2009-12-09 | 2010-06-02 | 中国科学院上海光学精密机械研究所 | Method for stripping residual pump light in double-coated optical fiber |
| CN103246010A (en) * | 2013-05-09 | 2013-08-14 | 江苏亨通光纤科技有限公司 | Optical fiber with multiple refractive indexes |
| CN104570212A (en) * | 2014-12-31 | 2015-04-29 | 西南技术物理研究所 | Double-cladding optical fiber cladding light stripping method |
| US9482824B2 (en) * | 2013-03-15 | 2016-11-01 | Ofs Fitel, Llc | Removing unwanted light from high-power optical systems |
| CN107247305A (en) * | 2017-07-04 | 2017-10-13 | 长飞光纤光缆股份有限公司 | Low decay single-mode fiber and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1110113A4 (en) * | 1998-06-29 | 2005-03-09 | Univ Syracuse | Method of fabricating a cylindrical optical fiber containing an optically active film |
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2015
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283277A (en) * | 1997-07-31 | 2001-02-07 | 康宁股份有限公司 | Optical device and fusion seal |
| US7306376B2 (en) * | 2006-01-23 | 2007-12-11 | Electro-Optics Technology, Inc. | Monolithic mode stripping fiber ferrule/collimator and method of making same |
| CN101718916A (en) * | 2009-12-09 | 2010-06-02 | 中国科学院上海光学精密机械研究所 | Method for stripping residual pump light in double-coated optical fiber |
| US9482824B2 (en) * | 2013-03-15 | 2016-11-01 | Ofs Fitel, Llc | Removing unwanted light from high-power optical systems |
| CN103246010A (en) * | 2013-05-09 | 2013-08-14 | 江苏亨通光纤科技有限公司 | Optical fiber with multiple refractive indexes |
| CN104570212A (en) * | 2014-12-31 | 2015-04-29 | 西南技术物理研究所 | Double-cladding optical fiber cladding light stripping method |
| CN107247305A (en) * | 2017-07-04 | 2017-10-13 | 长飞光纤光缆股份有限公司 | Low decay single-mode fiber and preparation method thereof |
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Effective date of registration: 20200904 Address after: 200437 Shanghai city Yangpu District Yixian Road No. 135 Patentee after: SHANGHAI INSTITUTE OF TRANSMISSION LINE (CETC NO.23 INSTITUTE) Address before: 200434 Shanghai city Yangpu District Yixian Road No. 135 Patentee before: TXSTAR LASER TECHNOLOGY (SHANGHAI) Co.,Ltd. |