CN1700045A - Method for making hot core expansion optical fiber - Google Patents
Method for making hot core expansion optical fiber Download PDFInfo
- Publication number
- CN1700045A CN1700045A CN 200410009109 CN200410009109A CN1700045A CN 1700045 A CN1700045 A CN 1700045A CN 200410009109 CN200410009109 CN 200410009109 CN 200410009109 A CN200410009109 A CN 200410009109A CN 1700045 A CN1700045 A CN 1700045A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- hot core
- core expansion
- laser
- fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a method for making heat core optical fiber which comprises the following steps: striping the overlay which ahs prevention impact of optical fiber's needed heating parts to disclose bare fiber with drum and cladding structure, keeping bare fiber straightness, connecting light source and optical dynamometer onto both ends of optical fiber, positing CO2 laser onto the bare fiber's square lower place, adjusting CO2 laser so that its laser beam can center bare fiber, opening the laser to heat bare fiber and continually adjusting the output power of the laser by luminosity to assure the heating temperature between 1200 deg. and 1700 deg., measuring and outputting luminosity by optical dynamometer, stopping heat after the requirement. Cut off the optical fiber at maximum drum diameter of bare fiber to obtain heat core optical fiber of plane end.
Description
Technical field:
The present invention relates to a kind of method for making of hot core expansion optical fiber.
Background technology:
The light that light source (can send the object of light as semiconductor luminotron, laser instrument or other) is sent is delivered into optical fiber, is called optical fiber is advanced in optically-coupled.The device of various conduction light waves (is referred to as optical waveguide again, as optical fiber is exactly a kind of optical waveguide) light sent sends into optical fiber, perhaps conversely, the light that optical fiber is sent is sent into other optical waveguide, be called the coupling between optical fiber and other optical waveguide, light just can transmit between optical waveguide and optical fiber like this.
Optical fiber is by the bigger fuse of innermost layer refractive index, and the overlay that covering that intermediate refractive index layer is less and outermost layer shield constitutes, and the size of fuse is very little usually.How light being sent in this small-sized optical fiber, particularly light as much as possible is sent in the optical fiber, promptly improve the coupling efficiency of optical fiber, is technical very strong problem.Because not by being strapped in the fuse of strictness, but some leaks in the covering and go light, that is to say in transmission course, only in the structure that fuse and covering are formed, transmit.For making things convenient for the explanation of problem, at first introduce the notion of mode field diameter here.What the mould field was reflected is the effective transmission range of light signal in optical fiber, and mode field diameter is the parameter of this effective transmission range of tolerance.The mode field diameter of optical fiber usually than actual fuse slightly larger in diameter some, for example common communication is generally 9 micron (10 with the fuse diameter of single-mode fiber
-6Rice) about, mode field diameter approximately is 10.5 microns.The mode field diameter of optical fiber is big more, and the coupling efficiency of light is just high more.
In addition, because the fuse of optical fiber is very little, can produce the very big angle of divergence when light beam is sent from optical fiber, quite a few light all can can't enter another root optical fiber or other optical waveguide owing to spreading loss falls.So an end of sending at light is collimated light beam usually, so just can reduce to send the angle of divergence of light beam, thereby reduce the loss of light, improve coupling efficiency.
Therefore, two effective ways that improve the coupling efficiency of optical fiber are exactly to enlarge the mode field diameter of optical fiber and output light is assembled.Beam convergence method commonly used is that the optic fibre end with the plane is processed into other shape, taper surface for example, and sphericals etc. so just are equivalent to add a convergent lens at optic fibre end.And the mode field diameter that enlarges optical fiber need be produced a kind of hot core expansion optical fiber that is different from general single mode fiber.
The principal ingredient of optical fiber fuse is highly purified silicon dioxide, wherein is mixed with suitable impurity, for example germanium.Impurity is equally distributed in fuse under the normal temperature, but under 1200-1700 ℃ high temperature, the impurity in the fuse will be diffused into whole optical fiber the inside, causes the expansion of fuse diameter, and its mode field diameter also can be along with expansion.Therefore, the high temperature heating is carried out in the optical fiber part, heating-up temperature that a GPRS is suitable and time, just can under the situation that does not change the fibre cladding size, enlarge the mode field diameter of heated portion.Optical fiber after the processing is called hot core expansion (Thermally-diffused Expanded Core) optical fiber in this way.
At present, make hot core expansion optical fiber method commonly used and have two kinds:
1) optical fiber is placed on the directly heating of flame top that miniature heating arrangement produces, the working gas of heating arrangement adopts propane and oxygen more.
2) with cylindrical electric furnace heating.Optical fiber is placed in the silicon vacuum tube of electric furnace central authorities, by the silicon-carbide heaters heating of periphery.
The processing of hot core expansion optical fiber needs 1200-1700 ℃ high temperature usually, and above-mentioned two kinds of job operations cause certain pollution all can in this temperature range environment on every side, and method 2) optical fiber might contact with the inwall of silicon vacuum tube in, causes unusual diffusion of contaminants.
Summary of the invention:
At the existing problem and shortage of above-mentioned existing hot core expansion optical fiber fabrication method, the purpose of this invention is to provide the method for making of a kind of cleanliness without any pollution, easy-operating hot core expansion optical fiber.
The present invention is achieved in that a kind of method for making of hot core expansion optical fiber, may further comprise the steps:
Peel off the overlay that shields that needs heating part on the optical fiber, expose the naked fibre that only comprises fuse and cladding structure;
Make naked fine part keep straight, and connect light source and light power meter respectively at the two ends of optical fiber;
With CO
2Laser instrument place naked fibre under, adjust CO
2Laser instrument makes its emitted laser bundle over against naked fibre;
Open CO
2Laser instrument heats naked fine part, and constantly regulates CO according to light power meter
2The output power of laser instrument guarantees heating-up temperature in 1200-1700 degree centigrade scope, and measures Output optical power by light power meter, stops heating after reaching requirement;
With fiber cut, obtain the hot core expansion optical fiber of plane end along the fuse diameter maximum that heats the naked fibre in back.
Further, the hot core expansion optical fiber of described plane end can also pass through Precision Machining such as grinding and polishing, etching, fused biconical taper as required, make optic fibre end become different shapes such as inclined-plane, taper surface, sphere, lozenges.
Further, described CO
2Also be provided with the condenser of convergent laser bundle on the light beam of laser instrument.
Further, described condenser is specifically as follows plano-convex lens, biconvex lens, concave mirror.
The present invention utilizes the method for laser beam as the making hot core expansion optical fiber of thermal source, and selects CW CO for use
2Laser instrument is as the light source of its laser beam.Because the laser controllability is more intense, energy conversion efficiency is higher, it is more stable work, so uses more conveniently, and process of the present invention is quite totally pollution-free.
Description of drawings:
Below in conjunction with accompanying drawing, the present invention is made detailed description.
Fig. 1 is simple optical fiber processing synoptic diagram of the present invention;
The cross-sectional schematic of Fig. 2 after for optical fiber of the present invention processing;
Fig. 3 is a hot core expansion profile of optic fibre synoptic diagram of the present invention;
Fig. 4 is the hot core expansion optic fibre end synoptic diagram of example of the present invention;
Fig. 5 is the application synoptic diagram of hot core expansion optical fiber of the present invention.
Embodiment:
As shown in Figure 1, the present invention is adding man-hour to optical fiber, at first peels off the overlay that needs heating part to be used to protect on the optical fiber, exposes the structure that only comprises fuse and covering, and this structure is commonly referred to naked fibre.Will make this root optical fiber keep straight then, and the two ends of optical fiber link to each other respectively with the light power meter (not shown) with light source.Here, light source is common light source, as semiconductor luminotron, laser instrument etc.Light power meter is used for measuring the loss of light in this section optical fiber of heating front and back light source output, also can monitor the degree that fuse enlarges according to the luminous power and the corresponding relation between the mode field diameter of optical fiber output.With CW CO
2Laser instrument places as heating source under the naked fibre, adjusts CO
2Laser instrument makes light beam over against naked fine part.Open CO
2Laser instrument in heating process, needs constantly to regulate the output power of laser instrument, and the purpose of doing like this has two: the one, guarantee the loss minimum of light at heating part; The 2nd, be used for controlling the temperature of heating, temperature is low excessively, and the impurity in the optical fiber fuse can not fully spread, and temperature is too high then can be caused fiber-fuse or bursts.Simultaneously, go back GPRS suitable heat time heating time, the time is too short, and the expanded scope of mode field diameter is limited; And the time lengthening, the loss meeting of heating part also can increase thereupon.But temperature will remain in 1200-1700 degree centigrade the scope.
Here, the present invention will be described for the process by making general hot core expansion optical fiber.Regulate CW CO
2The power of laser instrument remains on heating-up temperature between 1200-1700 degree centigrade, according to time to the different needs control heating of expanding core degree and loss, generally a few minutes to not waiting between the several hrs.
Here, CO
2Laser instrument can be selected the air-cooled CO of UL series of Guangzhou An Te for use
2Laser instrument, laser output power scope are 25-100W.Certainly, the CW CO of other models
2Laser instrument can be used for the present invention equally.The power of laser instrument also can be selected as required flexibly.
As shown in Figure 2, the hot core expansion optical fiber cut-open view after the present invention's processing, as seen, its mode field diameter had enlarged than originally.
As shown in Figure 3, the position of the hot core expansion optical fiber after the processing from fuse diameter maximum cut off, just can directly use, it can guarantee the coupling efficiency of light.
The same with other light sources such as semiconductor luminotrons, also there is certain angle of divergence in the laser beam of CO2 laser instrument output, the dispersing of laser beam can make a part of light loss consume and can not effectively be radiated on the naked fibre, it is inhomogeneous to cause that also naked fibre is heated, thereby causes the Anomalous Diffusion of impurity in the fuse.In order to improve the work efficiency of CO2 laser instrument, can add the optical lens that light beam is played converging action at the port that laser beam produces, for example plano-convex lens, biconvex lens, concave mirror or the like accumulate on the naked fibre light beam effectively.Like this, both reduced, obtained comparatively desirable expansion core effect because the loss of the luminous energy that beam divergence causes can guarantee the optical fiber thermally equivalent again.
In addition, also can and be fixed together, connect on the beckets,, just can process simultaneously multifiber as long as keep enough distances between the optical fiber such as these optical fiber being installed in many optical fiber with the composition fibre bundle of the optical fiber more than one.At this moment, the rotation that need be by optical fiber or the rotation of laser beam realize the thermally equivalent of every optical fiber.For example, optical fiber can be fixed on the support that has rotatable components, make the moving part rotation of optical fiber along with support; Also can be at CO
2Add a rotatable device on the port of laser output laser beam, laser beam is rotated.
As shown in Figure 4, after making hot core expansion optical fiber with said method, again by a series of accurate micro fabrications such as grinding and polishing, etching, fused biconical tapers, the optic fibre end that originally is the plane is become various nonplanar shapes, for example inclined-plane, spherical, lozenges, taper surface or the like, these special fiber end faces all have converging action, can reduce the angle of divergence of output beam.
As shown in Figure 5, adopt the hot core expansion optical fiber of special end face realize between optical fiber and the optical fiber or optical fiber and other optical waveguide between be connected, can further improve coupling efficiency.
Claims (4)
1. the method for making of a hot core expansion optical fiber may further comprise the steps:
Peel off the overlay that needs heating part to shield on the optical fiber, expose the naked fibre that only comprises fuse and cladding structure;
Make naked fine part keep straight, and connect light source and light power meter respectively at the two ends of optical fiber;
With CO
2Laser instrument place naked fibre under, adjust CO
2Laser instrument makes its emitted laser bundle over against naked fibre;
Open CO
2Laser instrument heats naked fine part, and constantly regulates CO according to light power meter
2The output power of laser instrument guarantees heating-up temperature in 1200-1700 degree centigrade scope, and measures Output optical power by light power meter, stops heating after reaching requirement;
With fiber cut, obtain the hot core expansion optical fiber of plane end along the fuse diameter maximum that heats the naked fibre in back.
2. the method for making of hot core expansion optical fiber as claimed in claim 1 is characterized in that, the hot core expansion optical fiber of described plane end can also pass through the Precision Machining of grinding and polishing, etching, fused biconical taper as required, makes optic fibre end become different shape.
3. the method for making of hot core expansion optical fiber as claimed in claim 1 is characterized in that, described CO
2Also be provided with the condenser of convergent laser bundle on the light beam of laser instrument.
4. the method for making of hot core expansion optical fiber as claimed in claim 3 is characterized in that, described condenser is specifically as follows plano-convex lens, biconvex lens, concave mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009109 CN1700045A (en) | 2004-05-20 | 2004-05-20 | Method for making hot core expansion optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009109 CN1700045A (en) | 2004-05-20 | 2004-05-20 | Method for making hot core expansion optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1700045A true CN1700045A (en) | 2005-11-23 |
Family
ID=35476187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410009109 Pending CN1700045A (en) | 2004-05-20 | 2004-05-20 | Method for making hot core expansion optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1700045A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975763A (en) * | 2010-08-24 | 2011-02-16 | 中北大学 | Integrated probe type microsphere cavity sensor |
| CN103267996A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | Comb filter based on expanded-core optical fiber |
| CN104297921A (en) * | 2014-11-14 | 2015-01-21 | 珠海保税区光联通讯技术有限公司 | Optical adjustable filter |
| CN106405742A (en) * | 2016-10-20 | 2017-02-15 | 南方科技大学 | Optical fiber beam combiner and manufacturing method thereof |
| CN109765656A (en) * | 2019-03-07 | 2019-05-17 | 深圳市艾孚光电科技有限公司 | Expand multimode fibre lens and production method |
| CN110954994A (en) * | 2019-12-18 | 2020-04-03 | 华中科技大学 | Optical switch |
| CN113064235A (en) * | 2021-03-22 | 2021-07-02 | 威海光子信息技术产业研究院有限公司 | Device for removing optical fiber cladding by using laser |
| CN113860727A (en) * | 2021-08-27 | 2021-12-31 | 哈尔滨工程大学 | Preparation method of self-deformation core optical fiber based on oxyhydrogen flame heating |
-
2004
- 2004-05-20 CN CN 200410009109 patent/CN1700045A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975763A (en) * | 2010-08-24 | 2011-02-16 | 中北大学 | Integrated probe type microsphere cavity sensor |
| CN103267996A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | Comb filter based on expanded-core optical fiber |
| CN104297921A (en) * | 2014-11-14 | 2015-01-21 | 珠海保税区光联通讯技术有限公司 | Optical adjustable filter |
| CN106405742A (en) * | 2016-10-20 | 2017-02-15 | 南方科技大学 | Optical fiber beam combiner and manufacturing method thereof |
| CN109765656A (en) * | 2019-03-07 | 2019-05-17 | 深圳市艾孚光电科技有限公司 | Expand multimode fibre lens and production method |
| CN110954994A (en) * | 2019-12-18 | 2020-04-03 | 华中科技大学 | Optical switch |
| CN113064235A (en) * | 2021-03-22 | 2021-07-02 | 威海光子信息技术产业研究院有限公司 | Device for removing optical fiber cladding by using laser |
| CN113860727A (en) * | 2021-08-27 | 2021-12-31 | 哈尔滨工程大学 | Preparation method of self-deformation core optical fiber based on oxyhydrogen flame heating |
| CN113860727B (en) * | 2021-08-27 | 2023-05-05 | 哈尔滨工程大学 | Preparation method of self-deformation core optical fiber based on oxyhydrogen flame heating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI252338B (en) | Beam bending apparatus and method of manufacture | |
| EP1579257B1 (en) | Optical fiber lens and method of manufacture | |
| US6963682B2 (en) | Beam altering fiber lens device and method of manufacture | |
| US6758935B2 (en) | Fabrication of collimators employing optical fibers fusion-spliced to optical elements of substantially larger cross-sectional areas | |
| EP1405111B1 (en) | Method of fabricating arrayed optical fibre collimators | |
| US6352376B2 (en) | Use of a laser to fusion-splice optical components of substantially different cross-sectional areas | |
| US5446816A (en) | Optical fiber having a lens formed at an end thereof | |
| WO2018148187A1 (en) | Optical fiber for silicon photonics | |
| WO2007116792A1 (en) | Light input/output port of optical component and beam converting apparatus | |
| JP2008098316A (en) | Semiconductor laser module | |
| JP2007507007A (en) | Fiber lens with multimode pigtail | |
| CN1700045A (en) | Method for making hot core expansion optical fiber | |
| US20040156585A1 (en) | Lensed fiber for optical interconnections | |
| US20040151431A1 (en) | Lensed fiber having small form factor and method of making the same | |
| US20210135423A1 (en) | Methods and systems for spectral beam-combining | |
| KR100430945B1 (en) | Use of a laser to fusion-splice optical components of substantially different cross-sectional areas | |
| WO2003076992A1 (en) | Optical fiber biconic lens and method of manufacture | |
| CN113568114A (en) | Optical receptacle and optical transceiver | |
| CN211236361U (en) | Silicon photonic chip optical power measuring device and equipment | |
| CN101634730B (en) | Light transformation system and light transformation method | |
| JP2000206357A (en) | Optical fiber coupling method | |
| Arndt-Staufenbiel et al. | Specific glass fiber technologies: lensing and laser fusion | |
| WO2002088814A2 (en) | Improvements relating to optical fibre collimators | |
| Cheng et al. | Analysis of integrated chip of core pitch matching using microlens arrays | |
| GB2381324A (en) | Optical fibre coupling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |