CN106597609B - A kind of preparation method of high reliability optical fiber filter - Google Patents
A kind of preparation method of high reliability optical fiber filter Download PDFInfo
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- CN106597609B CN106597609B CN201611241293.8A CN201611241293A CN106597609B CN 106597609 B CN106597609 B CN 106597609B CN 201611241293 A CN201611241293 A CN 201611241293A CN 106597609 B CN106597609 B CN 106597609B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
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Abstract
The present invention relates to a kind of preparation methods of high reliability optical fiber filter, comprising steps of filter plate is bonded on the first quartz ampoule by (1) is made into filter plate component；(2) one of optical fiber collimator puts on filter plate component, regulates collimator end face at a distance from filter plate, is adhesively fixed to form the first filtering optical path；(3) another optical fiber collimator end face is put on into the first quartz ampoule, forms the second filtering optical path with glue sticking after regulating collimator end face at a distance from quartzy end surfaces；(4) two collimators are fixed on five times regualting frame, play the role of being connected and fixed two collimator endfaces with the second quartz pipe sleeve；(5) determine whether the room temperature loss of optical fiber filter meets the requirements；(6) it coats ultraviolet glue and exposes and optical fiber filter semi-finished product module is made；(7) semi-finished product module is subjected to hot baking processing；(8) semi-finished product module is inserted in stainless steel tube, stainless steel tube gap and both ends are blocked with silicon rubber.
Description
Technical field
The invention belongs to field of optoelectronic devices, and in particular to a kind of preparation method of high reliability optical fiber filter.
Background technique
Critical component one of of the Er-Doped superfluorescent fiber source as optical fibre gyro provides needed for generating Sagnac effect for gyro
Optical signal.Particularly, highly stable mean wavelength must be kept to ensure gyro work the light source of high-precision optical fiber gyro
The stabilization of constant multiplier during work.And saddle-shape er-doped light source used at present, passing through 50Krad (Si) total dose irradiation
Postwave length is drifted about, and mean wavelength bad stability under the conditions of full temperature, is unable to satisfy making for high-precision optical fiber gyro
Use demand.
Shaping is carried out to Er-Doped superfluorescent fiber source output spectrum by optical fiber filter, so that spectrum is become class Gaussian, can subtract
Erbium ion emission cross section changes the influence generated to output spectrum to the typical physicals such as small temperature and irradiation off field, to improve er-doped
The mean wavelength stability of light source, provides safeguard for high-precision optical fiber gyro.
Er-Doped superfluorescent fiber source output light indexs such as its spectrum width, output power after shaping can all have greatly changed,
Therefore the match condition of shaping element optical fiber filter and er-doped light source spectral pattern, the key technical index superiority and inferiority situation of component,
Device overall reliability situation plays a crucial role the use of er-doped light source even optical fibre gyro, therefore highly reliable
Optical fiber filter preparation in ground is of great significance.
Current product mostly uses biquartz pipe to encapsulate, the exposure of two quartz ampoule contact point viscose glues.First point: such encapsulation side
Case will lead to a pair of of bad control of optical fiber collimator operating distance, and room temperature Insertion Loss index is poor；Second point: due to first, second
Filtering optical path is fixed with ultraviolet glue, therefore reliability is lower；Thirdly: two pipes encapsulation coupling process is complex, production efficiency
It is lower.
Summary of the invention
It is an object of the invention to overcome the drawbacks described above of the prior art, a kind of system of high reliability optical fiber filter is provided
Preparation Method, this method can carry out selective filter to er-doped light source light spectrum in optical fibre gyro by optical fiber filter and keep light
The stability of spectral shape realizes and carries out shaping to Er-Doped superfluorescent fiber source output spectrum, to meet making for high-precision optical fiber gyro
With.
What above-mentioned purpose of the invention was mainly achieved by following technical solution:
A kind of preparation method of high reliability optical fiber filter, includes the following steps:
Step (1) by filter plate pre-glued on the end face of the first quartz ampoule and carries out pre-exposure, it is ensured that the band of filter plate
It is logical to face upward；
Step (2), the coating adhesive on the boundary line that filter plate is contacted with the first quartz ampoule, and ensure filter plate central hole
It is exposed after no glue, obtains filter plate component；
Step (3), the both ends that a pair of of optical fiber collimator is fixed on to five times regualting frame, one of optical fiber collimator tail optical fiber
It is connected with light source, another optical fiber collimator tail optical fiber is connected with power meter；Find the Best Coupling of the pair of optical fiber collimator
The loss of the pair of optical fiber collimator is put and assesses, loss requires 1 if loss is less than or equal to setting, enters step (4)；
Step (4) in filter plate assembly set wherein an optical fiber collimator, will control optical fiber collimator end face and filter
The distance of piece end face, spin filter piece component, while five times regualting frame is adjusted, find the Best Coupling point of a pair of of optical fiber collimator
And the loss of the pair of optical fiber collimator is assessed, if loss is less than or equal to setting, loss requires 2, in the first quartz ampoule
End face coating adhesive and expose the first filtering optical path is made, enter step (5)；
Step (5), by another first quartz pipe sleeve on another optical fiber collimator, adjust five times regualting frame make to be lost
Value is identical as the assessment loss value of optical fiber collimator a pair of of in step, control optical fiber collimator end face and the first quartzy end surfaces
Distance, and the second filtering optical path is made in coating adhesive exposure on the end face of the first quartz ampoule, and enters step (6)；
Step (6), by the second quartz pipe sleeve in the junction of the first filtering optical path and the second filtering optical path, find described the
One filtering optical path with second filtering optical path Best Coupling point simultaneously assesses it is described two filtering optical paths losses, if loss be less than or
When requiring 3 equal to setting loss, (7) are entered step；
Step (7), the junction coating adhesive post-exposure that the second quartz ampoule and first are filtered to optical path, the second filtering optical path,
Hot baking is carried out later, obtains optical fiber filter exemplar.
In above-mentioned highly reliable optical fiber filter preparation method, the length of first quartz ampoule is 2.4~3.2mm, interior
Diameter is 1.03~1.1mm, and outer diameter is 1.75~1.9mm, and the length of second quartz ampoule is 4.5-5.5mm, internal diameter 1.83
~2mm, outer diameter are 2.3~2.6mm.
In above-mentioned highly reliable optical fiber filter preparation method, the coating adhesive used is ultraviolet glue；It is pre- in the step (1)
Bonding uses ultraviolet glue.
In above-mentioned highly reliable optical fiber filter preparation method, the pre-exposure time is 5-20s in the step (1).
In above-mentioned highly reliable optical fiber filter preparation method, the first quartz ampoule is vertically put first in the step (1)
It is fixed on glass slide, with optical fiber in the end face of the first quartz ampoule point ultraviolet glue, the one of the filter plate that cross section is square
Angle along the first quartzy end surfaces far from ultraviolet glue at, it is flat-pushing at ultraviolet glue and ensuring that the band logical of filter plate faces upward, carry out pre-
Exposure.
In above-mentioned highly reliable optical fiber filter preparation method, the step (2), step (4), step (5), step (7)
In time for exposure be 2-6min.
In above-mentioned highly reliable optical fiber filter preparation method, in the step (4), control optical fiber collimator end face and filter
The distance of wave plate end face is 0.3-0.8mm；In the step (5) control optical fiber collimator end face and the first quartzy end surfaces away from
From for 0.4-0.8mm.
It is 0.20dB that setting loss, which requires 1, in above-mentioned highly reliable optical fiber filter preparation method, in the step (3),
It is 0.26dB that setting loss, which requires 2, in the step (4).
It is 0.30dB that setting loss, which requires 3, in above-mentioned highly reliable optical fiber filter preparation method, in the step (6).
In above-mentioned highly reliable optical fiber filter preparation method, it is 45 DEG C -85 DEG C that the heat in the step (8), which dries temperature,
And period of storage is -48h for 24 hours.
In above-mentioned highly reliable optical fiber filter preparation method, stainless steel pipe sleeve is filtered in the optical fiber that step (7) obtains
Be packaged on device exemplar, later by between stainless steel tube and optical fiber filter exemplar gap and stainless steel tube both ends silicon
Rubber is blocked, and optical fiber filter finished product is obtained.
In above-mentioned highly reliable optical fiber filter preparation method, the length of the stainless steel tube is 12-16mm.
Compared with prior art, the present invention has the following advantages:
(1), the preparation method of optical fiber filter proposed by the present invention, preparation process is simple, technical process is easy to control, raw
Produce high-efficient, at low cost, properties of product are good.Device summary structure size is smaller, meets the development of opto-electronic device miniaturization
Demand.
(2), the present invention is set with using junction of the quartz ampoule to the first filtering optical path and the second filtering optical path,
And length optimum proportioning relationship between the first quartz ampoule and the second quartz ampoule is obtained by a large number of experiments, the first quartzy pipe outside diameter with
The optimum proportioning relationship of second quartz ampoule internal diameter difference is set with, so that stress damages full temperature using two root canals compared to conventional method
Consumption influence of fluctuations is small, and full warm nature can be stablized, and index is excellent；The optical fiber filter high reliablity being prepared.
(3), the present invention is by controlling collimator end face at a distance from filter plate end face, and uses 360 ° of spin filter piece groups
Part cooperates five times regualting frame coupling, so that device room temperature loss objective is optimal, product qualification rate is significantly promoted；Technique mistake
Journey is simple to operation, and production efficiency is higher.
(4), the adhering process that the present invention passes through control filter plate, it is ensured that optical path is whole without gelatinization, device return loss
Qualified rate is up to 100%.
(5), the present invention by rotation viscose glue process so that first filtering optical path, second filtering optical path and with
Viscose glue is uniform at the dispensing of second quartz ampoule, glue amount is controllable, meets the requirement of structural strength and stability.
Detailed description of the invention
Fig. 1 is the schematic diagram of filter plate component of the present invention side；
Fig. 2 is the schematic diagram in filter plate component of the present invention section；
Fig. 3 is the schematic diagram that the present invention first filters optical path；
Fig. 4 is the schematic diagram that the present invention second filters optical path；
Fig. 5 is the schematic diagram of optical fiber filter exemplar of the present invention；
Fig. 6 is the schematic diagram of optical fiber filter finished product of the present invention；
Fig. 7 is the flow chart of optical fiber filter of the present invention preparation.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments:
It is illustrated in figure 7 the flow chart of optical fiber filter preparation of the present invention, the preparation method tool of optical fiber filter of the present invention
Body includes the following steps:
Quartz ampoule is truncated into desired size with scribing machine by step (1), obtains two first quartz ampoule 2-1,2-2, and second
Quartz ampoule 7, wherein the length of the first quartz ampoule 2-1,2-2 is 2.4-3.2mm；Internal diameter is 1.03-1.1mm, outer diameter 1.75-
1.9mm.The length of second quartz ampoule 7 is 4.5-5.5mm, internal diameter 1.83-2mm, outer diameter 2.3-2.6mm.
The length of the first quartz ampoule 2-1,2-2 is 2.8mm, internal diameter 1.05mm, outer diameter 1.8mm in the present embodiment.The
The length of two quartz ampoules 7 is 5mm, internal diameter 1.9mm, outer diameter 2.4mm.
First quartz ampoule 2-1 is vertically placed on glass slide and fixes by step (2), with optical fiber at the end of the first quartz ampoule 2-1
The a small amount of ultraviolet glue of millet cake, by one jiao of the filter plate 1 for being square cross section along the first end face quartz ampoule 2-1 far from ultraviolet glue
Place, flat-pushing at ultraviolet glue and ensuring that the band logical of filter plate 1 faces upward, adjustment 1 position of filter plate ensures the whole covering of filter plate 1
On the first quartz ampoule 2-1 center hole, pre-exposure, time for exposure 5-20s are carried out.Wave carrier piece 1 is placed on operated under microscope,
Enlargement ratio chooses 50 times.
Step (3) coats ultraviolet glue on the boundary line that filter plate 1 is contacted with the first quartz ampoule 2-1, in microscopical sight
Examining down ensures that optical path is exposed using ultraviolet lamp afterwards without glue (i.e. without glue at 1 center hole of filter plate), and time for exposure 2-6min is obtained
To filter plate component.It is as shown in Figure 1 the schematic diagram of filter plate component of the present invention side；Fig. 2 show filter plate group of the present invention
The schematic diagram in part section, whole optical path is without gelatinization.
Step (4), the right-hand man both ends that a pair of of optical fiber collimator is fixed on to five times regualting frame with fixture, left end collimator
(3) tail optical fiber is connected with light source, and right end collimator (4) tail optical fiber is connected with power meter.
Step (5) adjusts the distance on tri- directions five times regualting frame X, Y, Z with the angle in X, Y both direction
It is whole, it finds the Best Coupling point of the pair of optical fiber collimator and assesses the loss of the pair of optical fiber collimator 3, if loss is small
Require 1 in or equal to setting loss, then enter step (6), otherwise re-replace a pair of of optical fiber collimator, repeat step (4),
(5) loss is reappraised until meeting loss requires 1.
It is 0.2dB that setting loss, which requires 1, in the present invention.
Step (6) removes left hand adjusting bracket, will be by filter plate assembly set in left end collimator 3, CCD's with tweezers
The lower mobile filter plate component of observation, controlling 3 end face of left end collimator is 0.3-0.8mm, this implementation at a distance from 1 end face of filter plate
The distance is 0.4-0.45mm in example.
Step (7), 360 ° of spin filter piece components are simultaneously to the distance and X, Y on tri- directions five times regualting frame X, Y, Z
Angle in both direction is adjusted, and is found the Best Coupling point of a pair of of optical fiber collimator and is assessed the pair of fiber optic collimator
The loss of device, if loss is less than or equal to setting, loss requires 2, using optical fiber 360 ° on the end face of the first quartz ampoule 2-1
Ultraviolet glue 6 is coated, bubble in quartz ampoule gas 2-1 is driven out of confirmation uniform gluing post-exposure 2-6min solidification and the first filtering light is made
Road enters step (7)；
Otherwise, as overproof in being lost, it removes filter plate component collimation device end face and carries out cleaning treatment, weight after putting on again
Multiple step (6), (7) are debugged again, and the optical fiber filter plate component more renewed if being still unsatisfactory for loss and requiring 2 (repeats to walk
Suddenly (2), (3)), until meeting loss and requiring 2.It is illustrated in figure 3 the schematic diagram that the present invention first filters optical path.
It is 0.26dB that setting loss, which requires 2, in the present invention.
Step (8), using same method, remove right hand adjusting bracket, by another first quartz ampoule 2-2 cover right end standard
On straight device 4, adjusting five times regualting frame makes the loss value of a pair of of optical fiber collimator (including filter plate component and the first quartz ampoule 2-2)
It is identical as the assessment loss value of optical fiber collimator (including filter plate component) a pair of of in step (7), mobile the under the observation of CCD
One quartz ampoule 2-2 controls 4 end face of right end collimator in the first end face quartz ampoule 2-2 distance 0.4-0.8mm, the present embodiment
The distance is 0.5-0.6mm；And ultraviolet glue 9 is coated on the end face of the first quartz ampoule 2-2, exposure 2-6min solidification is made second
Optical path is filtered, (9) are entered step, is illustrated in figure 4 the schematic diagram that the present invention second filters optical path.
Step (9) moves right hand adjusting bracket in X direction, keeps the first filtering optical path and the second filtering optical path separate, uses tweezers
By one 7 sets of second quartz ampoule in the first filtering optical path, right hand adjusting bracket is moved in X direction again, further the first filtering light
Road is at a distance from the second filtering optical path, it is ensured that the second quartz ampoule 7 is covered simultaneously in the first filtering optical path in the second filtering optical path, is moved
Distance in dynamic X-direction enables output power identical as output valve before (i.e. loss assessed value is identical), if loss value deteriorates
It then needs to be finely adjusted the distance on tri- directions five times regualting frame X, Y, Z with the angle in X, Y both direction, find described
The Best Coupling point of first filtering optical path and the second filtering optical path and the losses for assessing described two filtering optical paths, if loss is less than
Or 3 are required equal to setting loss, (10) are entered step, else if loss is overproof, the first filtering of cleaning optical path end face is to meet
Loss requires 3.
It is 0.30dB that the loss set in the present invention, which requires 3,.
The gap of first quartz ampoule 2-1,2-2 and the second quartz ampoule 7 is 0.1mm in the present invention.
Step (10), with optical fiber respectively by the junction of the second quartz ampoule 7 and the first filtering optical path, the second filtering optical path
360 ° of coating ultraviolet glues, the second quartz ampoule of moving in rotation ensure that its glue amount between the first filtering optical path, the second filtering optical path is equal
Even, optical fiber filter semi-finished product exemplar is made in the abundant post-exposure 2-6min solidification of bond area.It is as described in Figure 5 optical fiber of the present invention
The schematic diagram of filter semi-finished product exemplar.
Optical fiber filter semi-finished product exemplar is removed and is put into incubator heat baking by step (11), and temperature is 45 DEG C -75 DEG C, storage
The time is deposited as -48h for 24 hours；Temperature is 50 DEG C in the present embodiment, and period of storage is for 24 hours.
Step (12) is encapsulated 10 sets of stainless steel tube with tweezers on optical fiber filter semi-finished product exemplar；Filter optical fiber
Device semi-finished product exemplar position is at 10 inside center of stainless steel tube.With 10 inside of silicon rubber filling stainless steel tube and block stainless steel
10 both ends of pipe, 10 both ends silicon rubber of stainless steel tube is semi-circular, radius 2-3mm, with cotton swab by the silicon on 10 surface of stainless steel tube
Normal temperature cure after rubber removal is clean, completes the preparation of optical fiber filter, is illustrated in figure 6 optical fiber filter finished product of the present invention
Schematic diagram.The length of stainless steel tube is 12-16mm, and the length of stainless steel tube 10 is 15mm, internal diameter 2.7mm in the present embodiment,
Outer diameter is 3mm.
Since Gyro Precision is higher, and optical fiber filter can generate certain shadow to the shaping in erbium source to output optical signal
It rings, therefore how to minimize device loss the case where realizing target call, optimization light source performance then becomes most important.It is comprehensive
Considerations above is closed, the bonding of filter plate will be using first fraction precuring, the cured method of rear whole viscose glue, to realize whole light
Road is without gelatinization；Optical fiber filter is very high to the index request of loss, and size is determined by the operating distance of collimator with angle,
And the operating distance of optical fiber collimator only has 3-4mm, filter plate angle only has 0.2 °, therefore to realize high performance index, to work
The requirement of skill is very strict.It is simultaneously the requirement for meeting device high reliability, outer layer passes through a second quartz ampoule cure package,
Since the gap of model 1 and 2 quartz ampoule of model only has 0.1mm, need to control technique in coupling process.
Use the optical fiber filter return loss value qualification rate of the method for the present invention production for 100%.
Optical fiber filter room temperature Insertion Loss index using the method for the present invention production is less than 0.35dB.
Warm loss fluctuation is less than 0.18dB to the optical fiber filter produced using the method for the present invention entirely.
Optical fiber filter using the method for the present invention production passes through the environmental tests such as temperature, mechanics, reliable performance.
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (12)
1. a kind of preparation method of high reliability optical fiber filter, characterized by the following steps:
Filter plate (1) pre-glued on the end face of the first quartz ampoule (2-1) and is carried out pre-exposure by step (1), it is ensured that filter plate
(1) band logical faces upward；
Step (2), the coating adhesive (5) on the boundary line that filter plate (1) is contacted with the first quartz ampoule (2-1), and ensure filter plate
(1) central hole obtains filter plate component without being exposed after glue；
Step (3), the both ends that a pair of of optical fiber collimator is fixed on to five times regualting frame, one of optical fiber collimator (3) tail optical fiber
It is connected with light source, another optical fiber collimator (4) tail optical fiber is connected with power meter；Find the best coupling of the pair of optical fiber collimator
Chalaza and the loss for assessing the pair of optical fiber collimator (3,4), if loss is less than or equal to setting, loss requires 1, enters
Step (4)；
Step (4) in filter plate assembly set wherein an optical fiber collimator (3), will control optical fiber collimator (3) end face and filter
The distance of wave plate (1) end face, spin filter piece component, while five times regualting frame is adjusted, find the best of a pair of of optical fiber collimator
Coupling point and the loss for assessing the pair of optical fiber collimator, if loss is less than or equal to setting, loss requires 2, in the first stone
The end face coating adhesive of English pipe (2-1) simultaneously exposes the first filtering optical path is made, and enters step (5)；
Step (5) covers another first quartz ampoule (2-2) on another optical fiber collimator (4), and adjusting five times regualting frame makes
Loss value is identical as the assessment loss value of optical fiber collimator a pair of of in step (4), control optical fiber collimator (4) end face and the first stone
The distance of the end face English pipe (2-2), and the second filtering optical path is made in coating adhesive (9) exposure on the end face of the first quartz ampoule (2-2),
And enter step (6)；
Step (6) covers the second quartz ampoule (7) in the junction of the first filtering optical path and the second filtering optical path, finds described the
One filtering optical path with second filtering optical path Best Coupling point simultaneously assesses it is described two filtering optical paths losses, if loss be less than or
When requiring 3 equal to setting loss, (7) are entered step；
Step (7), the junction coating adhesive post-exposure that the second quartz ampoule (7) are filtered to optical path with the first filtering optical path, second, it
After carry out hot baking, obtain optical fiber filter exemplar.
2. a kind of high reliability optical fiber filter preparation method according to claim 1, it is characterised in that: first stone
The length of English pipe (2-1,2-2) be 2.4~3.2mm, internal diameter be 1.03~1.1mm, outer diameter be 1.75~1.9mm, described second
The length of quartz ampoule (7) is 4.5-5.5mm, and internal diameter is 1.83~2mm, and outer diameter is 2.3~2.6mm.
3. a kind of high reliability optical fiber filter preparation method according to claim 1, it is characterised in that: the coating of use
Glue is ultraviolet glue；Pre-glued uses ultraviolet glue in the step (1).
4. a kind of preparation method of high reliability optical fiber filter according to claim 1, it is characterised in that: the step
(1) the pre-exposure time is 5-20s in.
5. a kind of preparation method of high reliability optical fiber filter described in one of -4 according to claim 1, it is characterised in that: institute
It states first vertically to be placed on the first quartz ampoule (2-1,2-2) in step (1) on glass slide and fix, with optical fiber in the first quartz ampoule
The end face point ultraviolet glue of (2-1,2-2), one jiao of the filter plate that cross section is square (1) is along the first quartz ampoule (2-1,2-
2) end face far from ultraviolet glue at, it is flat-pushing at ultraviolet glue and ensuring that the band logical of filter plate (1) faces upward, carry out pre-exposure.
6. a kind of preparation method of high reliability optical fiber filter described in one of -4 according to claim 1, it is characterised in that: institute
State step (2), step (4), step (5), the time for exposure in step (7) are 2-6min.
7. a kind of preparation method of high reliability optical fiber filter described in one of -4 according to claim 1, it is characterised in that: institute
It states in step (4), controlling optical fiber collimator (3) end face is 0.3-0.8mm at a distance from filter plate (1) end face；The step (5)
Middle control optical fiber collimator (4) end face is 0.4-0.8mm at a distance from the end face the first quartz ampoule (2-2).
8. a kind of preparation method of high reliability optical fiber filter described in one of -4 according to claim 1, it is characterised in that: institute
It states to set to be lost in step (3) and requires 1 as 0.20dB, it is 0.26dB that setting, which is lost and requires 2, in the step (4).
9. a kind of preparation method of high reliability optical fiber filter described in one of -4 according to claim 1, it is characterised in that: institute
Stating setting loss in step (6) and requiring 3 is 0.30dB.
10. a kind of preparation method of high reliability optical fiber filter described in one of -4 according to claim 1, it is characterised in that:
It is 45 DEG C -85 DEG C that heat in the step (7), which dries temperature, and period of storage is -48h for 24 hours.
11. a kind of preparation method of high reliability optical fiber filter described in one of -4 according to claim 1, it is characterised in that:
Stainless steel tube (10) is covered and is packaged on the optical fiber filter exemplar that step (7) obtains, later by stainless steel tube (10) with
Gap and stainless steel tube (10) both ends between optical fiber filter exemplar are blocked with silicon rubber, obtain optical fiber filter at
Product.
12. a kind of preparation method of high reliability optical fiber filter according to claim 11, it is characterised in that: it is described not
The length of rust steel pipe is 12-16mm.
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| CN114384636B (en) * | 2022-01-21 | 2023-09-01 | 广东安捷康光通科技有限公司 | Manufacturing method of miniature FP (Fabry-Perot) cavity narrow-band filter |
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| TW579446B (en) * | 2002-03-28 | 2004-03-11 | Asia Optical Co Inc | Wavelength-division multiplexer to reduce the insertion loss and reflection loss |
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