CN202275184U - Mid-infrared optical fiber - Google Patents
Mid-infrared optical fiber Download PDFInfo
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- CN202275184U CN202275184U CN2011203874818U CN201120387481U CN202275184U CN 202275184 U CN202275184 U CN 202275184U CN 2011203874818 U CN2011203874818 U CN 2011203874818U CN 201120387481 U CN201120387481 U CN 201120387481U CN 202275184 U CN202275184 U CN 202275184U
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- optical fiber
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- infrared
- middle infrared
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Abstract
The utility model is suitable for the technical field of an optical fiber, and provides a mid-infrared optical fiber, which comprises a quartz cladding layer and a fiber core in the cladding layer, wherein the fiber core is made of a mid-infrared glass material. Since the cladding layer of the mid-infrared optical fiber is made of quartz, the existing optical fiber cutting and welding device can be used conveniently and rapidly when the mid-infrared optical fiber is welded with a quartz optical fiber, and thus the welding can be facilitated. Moreover, the fiber core is made of mid-infrared glass with a high nonlinear coefficient, such as chalcogenide glass, telluride glass and fluoride glass, and is suitable for nonlinear applications such as production of the mid-infrared broadband supercontinuum. The mid-infrared optical fiber can be pumped by erbium/thulium-doped optical fiber laser, and an all-fiber mid-infrared broadband light source can be realized.
Description
Technical field
The utility model belongs to the optical fiber technology field, relate in particular to a kind of can with the mid-infrared light sub-optical fibre of common silica fibre low-loss welding.
Background technology
Because middle infrared glass has higher transparent wavelength range (generally at 2-16 μ m;) and nonlinear refraction rate coefficient (exceeding common quartz glass two one magnitude); Thereby be widely used infrared excess wideband light source like medical surgery (like laser calcination surgery), thermal imagery transmission or in being developed in fields such as mid-infrared laser conduction, nonlinear opticses.Middle infrared excess wideband light source also especially has high technology content and wide application prospect; Can be applicable to various fields such as OCT (Optical Coherence Tomography, optical coherence tomography), active Hyper spectral Imaging, molecular spectroscopy, biotechnology, environmental monitoring.Can also be applied to safety and environmental monitoring, as: the explosion gas detection system, survey methane and other explosion hazard gases; Burning efficiency and exhaust emissions monitoring system, measure CO, CO2 etc.; Poison gas is surveyed, vapour concentration etc. in the atmosphere.Is the advanced subject of field fiber in recent years to the research of middle infrared optical fiber always; New design constantly improves the performance of middle infrared optical fiber; As the waveguiding structure that utilizes photonic crystal fiber is regulated the chromatic dispersion and the birefringent characteristic of middle infrared optical fiber; Make that the research of middle infrared optical fiber has in recent years obtained remarkable progress, the middle infrared excess broadband spectral scope that is produced also reaches several microns.
Yet general middle infrared optical fiber has characteristics such as softening temperature is low, matter is crisp, is difficult to and the silica fibre welding, and this is because the fusing point of general melting quartz glass reaches more than 1800 degree, and the fusing point of infrared glass is merely several Baidu in general, and difference is very big.General er-doped (or thulium) fiber laser all is to be material with the silica fibre, be difficult to these laser instruments and middle infrared optical fiber welding, and and then produce the middle infrared excess wideband light source of full fiberize, this has limited its practical application.
The utility model content
The utility model technical matters to be solved is the middle infrared optical fiber that provides a kind of to be intended to realize the full fiberize welding of middle infrared optical fiber and silica fibre.
The utility model is achieved in that a kind of middle infrared optical fiber, and said middle infrared optical fiber has quartzy covering and the middle infrared glass fibre core that is wrapped in the said covering.
Further, said middle infrared glass is chalcogenide glass, tellurite glass or fluoride glass.
Further, said covering comprises the fused quartz surrounding layer, mixes fluorine district inner cladding and mixes the germanium dioxide district.
Because most materials of the middle infrared optical fiber that the utility model provided are for quartzy; With the silica fibre welding time; Can directly utilize existing fiber cutting and welder conveniently to operate; Therefore be more prone to welding, thereby realize the full fiberize welding of middle infrared optical fiber and silica fibre, this optical fiber can be used the quartzy fiber laser pump-coupling of existing quartz.In addition; Also can in quartzy covering, mix fluorine; Improve the nonlinear refraction rate coefficient of optical fiber to a certain extent and widened transparency range; And, can make whole nonlinear refraction rate coefficient be further enhanced again through in the fibre core hole, injecting especially chalcogenide glass of infrared glass, transparency range is further widened.
Description of drawings
Fig. 1 is the end section synoptic diagram of the middle infrared optical fiber that provides of the utility model embodiment;
Fig. 2 is the method for making synoptic diagram of the middle infrared optical fiber that provides of the utility model embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment realizes the full fiberize welding of available middle infrared optical fiber and silica fibre through making the hybrid glass type middle infrared optical fiber of quartzy covering-middle infrared glass fibre core.
The middle infrared optical fiber that the utility model embodiment provides has quartzy covering and the middle infrared glass fibre core 2 that is wrapped in the said covering; Fig. 1 is as a concrete example of the utility model, and covering comprises fused quartz surrounding layer 11, mixes fluorine district inner cladding 12 and mixes germanium dioxide district 13.Mix fluorine district inner cladding 12 through in covering, being provided with, improved the nonlinear refraction rate coefficient of optical fiber to a certain extent and widened transparency range.
Infrared glass can be chalcogenide glass, tellurite glass or fluoride glass in above-mentioned, and chalcogenide glass can adopt AS2S3 and AS2Se3, can make whole nonlinear refraction rate coefficient be further enhanced, and transparency range is further widened.
Further; Mix germanium dioxide district 13 through in covering, being provided with, can form a germanium dioxide high-index regions 13, even if in the hollow of centre, do not inject infrared glass; This hollow-core fiber also can be used as and independently passes optical waveguide, and this time conducts in the germanium dioxide high-refractive-index regions.
Particularly, the diameter of above-mentioned middle infrared glass fibre core 2 can design between 2um～6um, and the thickness of mixing fluorine district inner cladding 12 can be designed to 2um, and it is 0.008 that refractive index is sunk, and low-index regions plays the covering effect; And the annular thickness of mixing germanium dioxide district 13 is 1-3um, and correspondingly, refractive index can rise to: 0.02-0.035.Refractive index ratio is mixed the high benefit in fluorine district and is here: even if fibre core is not filled the middle infrared glass of high index of refraction, be air, light also may be limited to mixes conduction in the germanium district; Promptly mix fluorine district inner cladding 12 refractive index of fused quartz is descended, can let the refractive index of fused quartz rise and mix germanium dioxide district 13.
Above-mentioned middle infrared optical fiber can adopt the high pressure injection method to make, and method for making comprises the steps:
Steps A: make a prefabricated rods; The prefabricated rods structure is respectively the fused quartz district from outside to inside, mix fluorine glass refraction bogging down area, mix the germanium dioxide glass region, core area is an airport along optical propagation direction; With prefabricated stick drawn wire, obtain middle porose hollow silica fibre.
Step B: an end of the hollow silica fibre that steps A is known inserts in the closed container of the middle infrared glass that fills fusion; To charging into inert gas in the said closed container, the middle infrared glass of fusion is injected in the hole of fibre core with inert gas pressure.
Wherein, above-mentioned middle infrared glass can be germanite glass, hoof thing glass or fluoride glass for chalcogenide glass, sulphur, and inert gas can adopt helium or argon gas to realize.
Fig. 2 is a kind of concrete implementation of above-mentioned method for making, and wherein middle infrared glass is example with the chalcogenide glass.With reference to Fig. 2, be placed with chalcogenide glass in the closed container A, be inserted with the silica fibre C that makes through steps A in the capping of closed container A, and spigot guarantees sealing.Then closed container A is vacuumized; When melting with infrared glass in preventing and oxygen react; Cause the glass sex change, heating is molten condition until chalcogenide glass to closed container A through stove B again, and is as indicated above; The fibre core inside of this silica fibre C has a hole along optical propagation direction, and silica fibre C will insert in the chalcogenide glass of fusion.Inert gas injecting D in closed container A, when the air pressure of closed container A acquires a certain degree, the chalcogenide glass of fusion under high pressure will inject in the hole of silica fibre C.Air pressure size through barometer adjustment closed container A can realize different injection length.
Most materials of above-mentioned middle infrared optical fiber are quartzy; With the silica fibre welding time; Can directly utilize existing fiber cutting and welder conveniently to operate; Therefore be more prone to welding, thereby realize the full fiberize welding of middle infrared optical fiber and silica fibre, this optical fiber can be used the quartzy fiber laser pump-coupling of existing quartz.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (3)
1. a middle infrared optical fiber is characterized in that, said middle infrared optical fiber has quartzy covering and the middle infrared glass fibre core that is wrapped in the said covering.
2. middle infrared optical fiber as claimed in claim 1 is characterized in that, said middle infrared glass is chalcogenide glass, tellurite glass or fluoride glass.
3. middle infrared optical fiber as claimed in claim 1 is characterized in that, said covering comprises the fused quartz surrounding layer, mixes fluorine district inner cladding and mixes the germanium dioxide district.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203874818U CN202275184U (en) | 2011-10-12 | 2011-10-12 | Mid-infrared optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203874818U CN202275184U (en) | 2011-10-12 | 2011-10-12 | Mid-infrared optical fiber |
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| Publication Number | Publication Date |
|---|---|
| CN202275184U true CN202275184U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203874818U Expired - Fee Related CN202275184U (en) | 2011-10-12 | 2011-10-12 | Mid-infrared optical fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368102A (en) * | 2011-10-12 | 2012-03-07 | 深圳大学 | Intermediate infrared optical fiber and manufacturing method thereof |
| CN103675992A (en) * | 2013-12-05 | 2014-03-26 | 江苏师范大学 | Infrared transmission composite optical fiber high in mechanical property and manufacturing method of infrared transmission composite optical fiber |
| CN111290074A (en) * | 2020-02-21 | 2020-06-16 | 东北大学 | Intermediate infrared Bragg optical fiber and gas qualitative and quantitative detection device thereof |
-
2011
- 2011-10-12 CN CN2011203874818U patent/CN202275184U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368102A (en) * | 2011-10-12 | 2012-03-07 | 深圳大学 | Intermediate infrared optical fiber and manufacturing method thereof |
| CN102368102B (en) * | 2011-10-12 | 2014-12-17 | 深圳大学 | Intermediate infrared optical fiber and manufacturing method thereof |
| CN103675992A (en) * | 2013-12-05 | 2014-03-26 | 江苏师范大学 | Infrared transmission composite optical fiber high in mechanical property and manufacturing method of infrared transmission composite optical fiber |
| CN111290074A (en) * | 2020-02-21 | 2020-06-16 | 东北大学 | Intermediate infrared Bragg optical fiber and gas qualitative and quantitative detection device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20121012 |