CN105502916B - A kind of processing method of rare earth ion doped optical fiber prefabricated rod - Google Patents
A kind of processing method of rare earth ion doped optical fiber prefabricated rod Download PDFInfo
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- CN105502916B CN105502916B CN201510877845.3A CN201510877845A CN105502916B CN 105502916 B CN105502916 B CN 105502916B CN 201510877845 A CN201510877845 A CN 201510877845A CN 105502916 B CN105502916 B CN 105502916B
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- drill bit
- rare earth
- earth ion
- ion doped
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
Abstract
The present invention relates to a kind of processing method of rare earth ion doped optical fiber prefabricated rod, the prefabricated rods of rare earth ion doped sandwich layer are contained using MCVD process deposits；Prefabricated rods are blocked subscribing position, rationally the pore size in two holes of design and position, several apertures are redesigned in two holes respectively；The diameter of corresponding aperture determines big drill bit, and the diameter of respective apertures determines small drill bit；Punching, is first punched, the position of several apertures need to be overlapping with the contact surface of prefabricated rods with big drill bit with small drill bit in the position of aperture, after the punching of several apertures is finished, recycles big drill bit to be punched in the position of big drill bit；After punching is finished, the inwall of device to hole carries out grinding and polishing, until endoporus reaches design size.Advantage is：The lifting surface area of rare earth ion doped optical fiber prefabricated rod during ultrasonic drilling can be effectively reduced by multiple punch method, and then the damage that mechanical external force is caused to preform can be weakened；The machining accuracy of rare earth ion doped optical fiber prefabricated rod can obtain further lifting.
Description
Technical field
The present invention relates to a kind of processing method of rare earth ion doped optical fiber prefabricated rod, belong to optic fibre manufacturing technology field.
Background technology
1985, the researcher of Southampton, Britain university used modified chemical vapor deposition technique (Modified
Chemical Vapour Deposition, MCVD) successfully develop rare earth doped fiber.In the late three decades, researcher is continuous
Ground is improved and innovated to the preparation technology of rare earth doped fiber, and then Rare-earth Doped OFAs are obtained with laser
Continue, quickly develop.Laser and application technology are to be related to national defence, an important optoelectronic areas forward position skill of the people's livelihood
Art, compared with the other types of laser such as semiconductor laser, gas laser, using rare earth doped fiber as the light of gain media
Fibre laser has the advantages that high light beam quality, high efficiency, Low threshold, tunable, narrow linewidth and high performance-price ratio, and mixes rare earth light
Fibre is to restrict the critical material that fiber amplifier further develops with laser, and therefore, we, which must further improve, mixes rare earth
The performance of optical fiber, the rare earth doped fiber of developing new product variety.
For the performance of constantly lifting fiber amplifier and laser, researcher is mixing the basis of single rare earth element optical fiber
On, rare earth ion co-doped fiber is developed, at present, the rare earth ion co-doped fiber for making progress larger is mainly erbium and ytterbium codoping light
Fibre, the rare earth ion co-doped fiber of other species is still in the theoretical and exploratory stage.Below by taking erbium-ytterbium co-doped fiber as an example, to dilute
The performance and advantage of native ion co-doped fiber are illustrated：Compared with Er-doped fiber, erbium-ytterbium co-doped fiber mainly has the advantage that：
Yb3+Absorption band (800 ~ 1070nm) and excitation band with non-constant width, greatly extend the scope of pump light source；Yb3+Without dense
Quenching phenomenon is spent, can be with high-concentration dopant；Yb3+Absorption cross-section be much larger than Er3+, it is easier to absorb the pumping luminous energy near 980nm
Amount；Yb3+'s2F5/2Can band and Er3+'s4I11/2Energy band is closer to, and ion energy is very easy to from Yb3+'s2F5/2Can band transfer
To Er3+'s4I11/2It can take, then radiationless transition is arrived4I13/2Energy band, finally gives off photon, returns to4I15/2Can band.However,
With developing rapidly for optical-fiber laser the radar exploration technique, people propose higher want to the performance of erbium-ytterbium co-doped fiber laser
Ask, that is, require that laser exports for linear polarization.The light beam that such as export laser has linear polarization characteristic, most efficient method
It is that optical fiber is made polarization-maintaining structure.But it is due to the limitation of active polarization maintaining optical fibre processing technology, the country there is no unit to develop
The erbium and ytterbium codoping polarization maintaining optical fibre of real requirement can be met.Therefore, the development of polarization maintaining optical fibre is co-doped with for rare earth ion, it is necessary to open
Send a kind of low damage prefabricated rods processing method of high accuracy.
The content of the invention
The purpose of the present invention is that there is provided one for existing rare earth ion doped polarization-preserving fiber preform processing method not enough
The processing method for planting rare earth ion doped optical fiber prefabricated rod, this method combines punching side by using the drill bit of different-diameter size
The maximum machine external force that prefabricated rods are subject in method reduction drill process, so as to reduce the damage of preform, improves prefabricated rods
Machining accuracy.
The object of the invention is realized and completed by following technical scheme：A kind of processing side of rare earth ion doped optical fiber prefabricated rod
Method, it is characterised in that：Step is as follows：
The first step, the prefabricated rods of rare earth ion doped sandwich layer are contained using MCVD process deposits；
Rare earth ion doped optical fiber prefabricated rod is removed after the completion of second step, deposition, prefabricated rods are blocked subscribing position, will
Prefabricated rods section is fixed on puncher after polishing；
3rd step, is required according to the performance indications of rare earth ion doped polarization maintaining optical fibre, with reference to the hot swollen of fibre core and inner cladding
After swollen coefficient and geometric parameter, the rationally pore size in two holes of design and position, the pore size in two holes and position are determined,
Redesign quantity, aperture and the position of several apertures respectively in two holes, the position of aperture should uniformly arrange in hole；
4th step, determines drill bit, and the diameter of corresponding aperture determines big drill bit, and the wall thickness of big drill bit is generally the 1/ of drill bit radius
5 to 1/3, need to check the smoothness and circularity of big drill bit outer wall and big drill bit inwall before punching, the diameter of respective apertures is determined
Small drill bit；
5th step, punching needs to check the integrality of drill bit and the glacing flatness of drilling rod, first with small drill bit in aperture before punching
Position is punched, and the position of several apertures need to be overlapping with the contact surface of prefabricated rods with big drill bit, and maximizes overlapping area as far as possible,
But the edge of aperture should recycle big drill bit in the position of big drill bit in big drill bit outer wall, after the punching of several apertures is finished
Punching is put, in drill process, the mechanical external force that preform is subject to diminishes, and then the damage of prefabricated rods can be reduced, improved
The machining accuracy of prefabricated rods；
6th step, after punching is finished, the inwall of device to hole carries out grinding and polishing, until endoporus reaches design size.
It is an advantage of the invention that：Multiple punch method is primarily suitable for panda type and mixes rare earth polarization maintaining optical fibre, by repeatedly punching
Method can effectively reduce the lifting surface area of rare earth ion doped optical fiber prefabricated rod during ultrasonic drilling, and then can weaken machinery
The damage that external force is caused to preform；Simultaneously as the resistance that drill bit is subject to diminishes, deviation of the drill bit during traveling
Degree is also minimized, and the machining accuracy of rare earth ion doped optical fiber prefabricated rod can obtain further lifting.
Brief description of the drawings
Fig. 1 is the structure chart of preform of the present invention；
Fig. 2 is aperture punch position schematic diagram；
Fig. 3 is Fig. 2A enlarged drawing；
Fig. 4 illustrates face to have beaten big drill bit after aperture with prefabricated rods contact area；
Fig. 5 is the schematic diagram of the big drill bit cross section of the present invention.
Embodiment
The for the benefit of understanding of technical staff of the same trade, below in conjunction with the accompanying drawings by embodiment to feature of present invention and other phases
Feature is closed to be further described.
As shown in figure 1, a kind of processing method of rare earth ion doped optical fiber prefabricated rod, step is as follows：The first step, is utilized
MCVD process deposits contain the prefabricated rods 1 of rare earth ion doped sandwich layer.
Rare earth ion doped optical fiber prefabricated rod 1 is removed after the completion of second step, deposition, prefabricated rods are blocked subscribing position,
It is fixed on after the section of prefabricated rods 1 is polished on puncher.
3rd step, is required according to the performance indications of rare earth ion doped polarization maintaining optical fibre, with reference to the heat of fibre core 2 and inner cladding 3
The coefficient of expansion and geometric parameter, the rationally pore size in two holes 4 of design and position, the pore size in two holes 4 and position are true
After fixed, quantity, aperture and the position of several apertures 5 are redesigned respectively in two holes 4, the position of aperture 5 should be in hole 4
Even arrangement, the quantity of aperture 5 is not limited to 4, can be less than 4, can also be more than 4, and the present embodiment is to make a call to 4 apertures 5
Example, as shown in Figure 2,3.
4th step, determines drill bit, and the diameter of corresponding aperture 4 determines big drill bit 6, as shown in figure 5, the wall thickness of big drill bit 6 is general
For the 1/5 to 1/3 of drill bit radius, need to check big drill bit outer wall 6-1 and big drill bit inwall 6-2 smoothness and circle before punching
Degree, the diameter of respective apertures 5 determines small drill bit.
5th step, punching is first punched with small drill bit in the position of aperture 5, the positions of several apertures need to big drill bit 6 with advance
The contact surface 1-1 of rod 1 processed is overlapping, as shown in figure 3, overlapping area is simultaneously maximized as far as possible, but the edge of aperture 5 should be in wammel
In first 6 outer wall 6-1.
After the punching of several apertures is finished, big drill bit 6 is recycled to be punched in the position in hole 4, now big drill bit 6 and prefabricated rods
1 contact surface 1-1 area substantially diminishes, as shown in Figure 4.If do not used the multiple punch method in this patent, big drill bit 6 with it is pre-
The contact surface of rod 1 processed is the cross section of big drill bit.
The less drill bit of diameter and prefabricated rods contact area are small, can effectively reduce the mechanical external force that prefabricated rods are subject to；It is multiple
After aperture 5 dozens is complete, the drill bit being relatively large in diameter is also corresponding to the contact area of prefabricated rods to diminish, so can effectively reduce prefabricated rods by
The mechanical external force arrived, the mechanical external force that preform is subject to diminishes, and then can reduce the damage of prefabricated rods, improve prefabricated rods
Machining accuracy.
6th step, after punching is finished, the inwall of device to hole carries out grinding and polishing, until endoporus reaches design size.
According to embodiments above, it just can process and damage the higher rare earth ion doped polarization-maintaining light of smaller, geometric accuracy
Fine prefabricated rods.
The rod core segment of preform is using silica as matrix, in addition at least one rare earth ion of doping, in plug
Also the elements such as aluminium and phosphorus can be mixed simultaneously.Mixed with the element for improving fibre core thermal coefficient of expansion in rod core.
The hole 4 of preform is processed by ultrasonic drilling method.
In summary, rare earth ion doped optical fiber prefabricated rod process can effectively be reduced the invention provides a kind of
The damage of middle barred body, improves the prefabricated rods drilling method of preform endoporus geometric accuracy, but the present invention be not limited to it is above-mentioned
Embodiment, to those of ordinary skill in the art, under the premise without departing from the principles of the invention, if can also make
Dry improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.It is not described in detail in this specification
Content belong to prior art known to professional and technical personnel in the field.
Claims (1)
1. a kind of processing method of rare earth ion doped optical fiber prefabricated rod, it is characterised in that：Step is as follows：The first step, is utilized
MCVD process deposits contain the prefabricated rods of rare earth ion doped sandwich layer（1）；
Rare earth ion doped optical fiber prefabricated rod is removed after the completion of second step, deposition（1）, prefabricated rods are blocked subscribing position, will
Prefabricated rods（1）Section is fixed on puncher after polishing；
3rd step, is required according to the performance indications of rare earth ion doped polarization maintaining optical fibre, with reference to fibre core（2）With inner cladding（3）Heat
The coefficient of expansion and geometric parameter, rationally design two holes（4）Pore size and position, two holes（4）Pore size and position
Put after determination, in two holes（4）Several apertures are inside redesigned respectively（5）Quantity, aperture and position, aperture（5）Position should
Should be in hole（4）Interior uniform arrangement；
4th step, determines drill bit, corresponding aperture（4）Diameter determine big drill bit（6）, big drill bit（6）Wall thickness for drill bit radius
1/5 to 1/3, need to check big drill bit outer wall before punching（6-1）With big drill bit inwall（6-2）Smoothness and circularity, correspondence it is small
Hole（5）Diameter determine small drill bit；
5th step, punching needs to check the integrality of drill bit and the glacing flatness of drilling rod, first with small drill bit in aperture before punching（5）'s
Position is punched, and the position of several apertures need to be with big drill bit（6）With prefabricated rods（1）Contact surface（1-1）It is overlapping and as maximum as possible
Change overlapping area, but aperture（5）Edge should be in big drill bit outer wall（6-1）It is interior, after the punching of several apertures is finished, recycle
Big drill bit（6）In big drill bit（6）Position punching, in drill process, the mechanical external force that preform is subject to diminishes, and then
The damage of prefabricated rods can be reduced, the machining accuracy of prefabricated rods is improved；
6th step, after punching is finished, the inwall of device to hole carries out grinding and polishing, until endoporus reaches design size.
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| CN201510877845.3A CN105502916B (en) | 2015-12-04 | 2015-12-04 | A kind of processing method of rare earth ion doped optical fiber prefabricated rod |
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| CN201510877845.3A CN105502916B (en) | 2015-12-04 | 2015-12-04 | A kind of processing method of rare earth ion doped optical fiber prefabricated rod |
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| CN105502916B true CN105502916B (en) | 2017-09-29 |
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| CN106082628A (en) * | 2016-06-22 | 2016-11-09 | 燕山大学 | A kind of preparation method of the polarization maintaining optical fibre that adulterates |
| CN109553291A (en) * | 2018-12-13 | 2019-04-02 | 中国电子科技集团公司第四十六研究所 | A kind of modified panda protecting polarized light fiber prefabricated rods and manufacture craft |
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| US4773924A (en) * | 1985-08-15 | 1988-09-27 | Corning Glass Works | Fiber optic coupler and method |
| CN101391861B (en) * | 2008-10-28 | 2012-02-08 | 长飞光纤光缆有限公司 | Large size combined optical fibre perform of polarization maintaining fiber and production method thereof |
| CN101825738B (en) * | 2010-05-21 | 2012-09-26 | 长飞光纤光缆有限公司 | Panda type polarization maintaining optical fiber |
| CN102120689A (en) * | 2010-10-13 | 2011-07-13 | 成都亨通光通信有限公司 | Preparation method of microstructure fiber |
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