CN109491018A - Fast tunable filter - Google Patents
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- CN109491018A CN109491018A CN201811598447.8A CN201811598447A CN109491018A CN 109491018 A CN109491018 A CN 109491018A CN 201811598447 A CN201811598447 A CN 201811598447A CN 109491018 A CN109491018 A CN 109491018A
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- fixing piece
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- fiber stub
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- 239000000919 ceramic Substances 0.000 claims abstract description 138
- 239000000835 fiber Substances 0.000 claims abstract description 76
- 230000003287 optical effect Effects 0.000 claims abstract description 59
- 239000013307 optical fiber Substances 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims description 37
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 229910052573 porcelain Inorganic materials 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- G02B6/29346—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 operating by wave or beam interference
- G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
-
- 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
- G02B6/29346—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 operating by wave or beam interference
- G02B6/29358—Multiple beam interferometer external to a light guide, e.g. Fabry-Pérot, etalon, VIPA plate, OTDL plate, continuous interferometer, parallel plate resonator
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The present invention provides a kind of fast tunable filter, the optical fiber connector and tuning block of fixing piece, both ends including both ends, optical fiber connector includes fibre core and fiber stub, fibre core along optical path direction protrudes into fiber stub, fiber stub is connect with fixing piece, the exit end of two fiber stubs is positioned opposite, tuning block includes the piezoelectric ceramics and the second piezoelectric ceramics along optical path direction arrangement, piezoelectric ceramics is connected between fixing piece and the second piezoelectric ceramics, and the second piezoelectric ceramics is connected between piezoelectric ceramics and the second fixing piece.Utilize the piezoelectric effect characteristic of piezoelectric ceramics, then to realize the accurate adjusting of the exit end spacing of fiber stub, make filter accurately adjustable filtering, different driving signals can be exported to piezoelectric ceramics simultaneously, so that this case filter can not only realize wide range of frequencies tuning at a slow speed, and quickly tuning and frequency scanning can be also realized using high-frequency vibration, it then being capable of faster and more accurately locking signal.
Description
Technical field
The present invention relates to optical filter field more particularly to a kind of fast tunable filters.
Background technique
With the development and maturation of fiber grating sensing technology, wavelength interrogation technique is had been to be concerned by more and more people and again
Depending on.Wavelength demodulation system based on tunable optical fiber FP filter has the advantages that at low cost, response is fast, high resolution,
It is widely used.And core devices of the tunable optical fiber FP filter as whole system, performance superiority and inferiority very great Cheng
The performance of entire demodulating system is determined on degree.In optical communication system, tunable FP filter is mainly used for wavelength-division multiplex
Demultiplexing and signal demodulation etc., filter oneself become mainstream device.In addition, FP device also acts as the signal in fiber amplifier
Filter also has important application in optical fiber laser and spectrum analysis.With other kinds of adjustable light wave-filter-sound
Optical filter, Mach-Zenhder filter, distributed feed-back cloth loudspeaker lattice laser tunable optic filter are compared, tunable FP filtering
Utensil has many advantages, and if insertion loss is low, tuned speed is fast, tunable range is wide, fineness is high and flexible structure, can make
At different structure to meet the needs of different free spectral ranges.
Summary of the invention
The object of the present invention is to provide a kind of fast tunable filters for realizing constant tuning and high frequency sweep.
In order to achieve the object of the present invention, the present invention provides a kind of fast tunable filter, which is characterized in that including first
Fixing piece, the first optical fiber connector, the second fixing piece, the second optical fiber connector and tuning block, the first optical fiber connector include
First fibre core and the first fiber stub, the first fibre core along optical path direction protrude into the first fiber stub, the first fiber stub with
The connection of first fixing piece, the second optical fiber connector include the second fibre core and the second fiber stub, and the second fibre core is along optical path direction
It protrudes into the second fiber stub, the second fiber stub is connect with the second fixing piece, the exit end of the first fiber stub and the second light
The exit end of fine lock pin is positioned opposite, and tuning block includes the first piezoelectric ceramics and the second piezoelectricity pottery along optical path direction arrangement
Porcelain, the first piezoelectric ceramics are connected between the first fixing piece and the second piezoelectric ceramics, and the second piezoelectric ceramics is connected to the first piezoelectricity
Between ceramics and the second fixing piece.
By above scheme as it can be seen that by the exit end of the exit end of the first fiber stub and the second fiber stub in receiving opening
It is interior positioned opposite, F-P resonant cavity is then formed, and the piezoelectric effect characteristic of piezoelectric ceramics is utilized, then to realize that optical fiber is inserted
The accurate adjusting of the exit end spacing of core makes filter accurately adjustable filtering, while the setting of two piezoelectric ceramics of utilization, can incite somebody to action
Different driving signals is exported to piezoelectric ceramics, such as a driving signal is DC control signal or low-frequency control signal, and another
One driving signal is high-frequency controling signal, so that this case filter can not only realize wide range of frequencies tuning at a slow speed, and
Quickly tuning and frequency scanning can be realized using high-frequency vibration, it then being capable of faster and more accurately locking signal.
Further scheme is that the first piezoelectric ceramics is connect in the first end of optical path direction with the first fixing piece, the
One piezoelectric ceramics is connect in first end of the second end with the second piezoelectric ceramics in optical path direction of optical path direction, the second piezoelectricity
Ceramics are connect in the second end of optical path direction with the second fixing piece.
Therefore by the first end connection type, enable piezoelectric ceramics in the deformation distance of optical path direction
During preferably matching frequency is adjusted, so that degree of regulation is higher.
Further scheme is that length of first piezoelectric ceramics on optical path direction is greater than the second piezoelectric ceramics in optical path
Length on direction.
Therefore longer piezoelectric ceramics has biggish stroke range and lower natural resonance frequency, is suitable for
Direct current biasing and at a slow speed tuner operation, shorter piezoelectric ceramics have shorter stroke range and higher natural resonance frequency,
It suitable for quickly tuning and scan operation, is used cooperatively by the driving of two piezoelectric ceramics, realizes a wide range of constant tuning, quickly
Tuning and higher frequency scanning.
Further scheme is that the first piezoelectric ceramics and the second piezoelectric ceramics are arranged in a ring, is passed through along optical path direction
It is provided with receiving opening with wearing the first piezoelectric ceramics and the second piezoelectric ceramics, the exit end of the first fiber stub and the second optical fiber are inserted
The exit end of core is positioned opposite in receiving opening.
Therefore it is protected using the piezoelectric ceramics of annular setting so that the axial deformation distance of piezoelectric ceramics is more controllable
The concentricity of optical device is demonstrate,proved, reduces loss, and the arragement construction of this case is more stable.
Further scheme is that the first fixing piece is provided through the first installation through-hole along optical path direction, and second is fixed
Part is provided through the second installation through-hole along optical path direction, and the first installation through-hole, receiving opening and the second installation through-hole successively connect
It is logical；First optical fiber connector includes the first connector, and the first fiber stub is fixed on the first connector, and the first optical fiber is inserted
Core passes through the first installation through-hole, and the first connector is installed in the first installation through-hole；Second optical fiber connector includes the second connector,
Second fiber stub is fixed on the second connector, and the second fiber stub passes through the second installation through-hole, the second connector peace
It fills in the second installation through-hole.
Therefore cooperated by the installation of installation through-hole and connector, so that the installation of fiber stub is more stable, after
And device concentricity also can be further improved, improve job stability.
Further scheme is that the first fixing piece is provided with the first bulge loop in the first end face towards the second fixing piece,
The first end of first piezoelectric ceramics is connect with the first end face of the first fixing piece, and the first bulge loop protrudes into receiving opening；Second is solid
Determine part and the second end face of the first fixing piece is being provided with the second bulge loop, the second end of the second piezoelectric ceramics and the second fixing piece
Second end face connection, the second bulge loop protrudes into receiving opening.
Therefore the limit of piezoelectric ceramics is fixedly mounted by bulge loop, in piezoelectric ceramics deformation, the shifting of fixing piece
Dynamic is coaxially to be axially moveable, and then guarantees the concentricity of filter device.
Further scheme is that the first fixing piece and/or the second fixing piece are made of steel, stainless steel or quartz.
Therefore fixing piece can be used the lower material of thermal expansion coefficient and be made, such as steel, stainless steel or quartz, make
The expansion for obtaining fixing piece is not influenced by environment temperature or operating temperature, then guarantees to filter accurate and job stability.
Further scheme is that fast tunable filter further includes third fixing piece, and third fixing piece is connected to first
Between piezoelectric ceramics and the second piezoelectric ceramics.
Therefore third fixing piece can also be set between the first piezoelectric ceramics and the second piezoelectric ceramics, it is piezoelectricity
Ceramics provide more stable connection.
Further scheme is that tuning block includes the third piezoelectric ceramics along optical path direction arrangement, third piezoelectricity pottery
Porcelain is connected between the second piezoelectric ceramics and the second fixing piece.
Further scheme is that length of first piezoelectric ceramics on optical path direction is greater than the second piezoelectric ceramics in optical path
Length on direction, length of second piezoelectric ceramics on optical path direction are greater than length of the third piezoelectric ceramics on optical path direction
Degree.
Therefore other than the setting of two piezoelectric ceramics, three piezoelectric ceramics or three or more can also be set
The purpose that this case can be achieved, using the driving signal different to piezoelectric ceramics, then can be realized different modes tuning and
The scanning of different modes.
Detailed description of the invention
Fig. 1 is the structure chart of fast tunable filter first embodiment of the present invention.
Fig. 2 is the explosive view of fast tunable filter first embodiment of the present invention.
Fig. 3 is the cross-sectional view of fast tunable filter first embodiment of the present invention.
Fig. 4 is the cross-sectional view of fast tunable filter second embodiment of the present invention.
Fig. 5 is the cross-sectional view of fast tunable filter 3rd embodiment of the present invention.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Fast tunable filter first embodiment:
Referring to figs. 1 to Fig. 3, fast tunable filter 1 is solid including the first fixing piece 11, the first optical fiber connector 12, second
Determine part 13, the second optical fiber connector 14 and tuning block 15.First optical fiber connector 12 includes the first fibre core 121, the first optical fiber
Lock pin 122 and the first connector 123, the first connector 123 are provided through location hole, and the first fiber stub 122 passes through and consolidates
Fixed to be arranged on the first connector 123, the periphery of the first connector 123 is provided with protrusion, and raised outer surface is provided with outer spiral shell
Clearance groove 124 is arranged in line between bumps, and protrusion and clearance groove 124 are uniformly circumferentially interspersed, and the first fibre core 121 is along light
It protrudes into road direction in the first fiber stub 122, the end of the first fibre core 121 extends to the exit end of the first fiber stub 122,
The signal light of first fibre core 121 transmission exists
The exit end of first fiber stub 122 exports.
First fixing piece 11 can be made of steel, stainless steel or quartz, and the first fixing piece 11 is provided through along optical path direction
First installation through-hole 111 and positioning through hole 113, the first installation through-hole 111 are provided with the first convex of annular radially inwards
Along 112, first convexes along 112 between the first installation through-hole 111 and positioning through hole 113, the first installation through-hole 111 setting
There is opening outwardly, positioning through hole 113 is provided with opening towards the first piezoelectric ceramics 151, and the first fixing piece 11 is in direction second
The first end face of fixing piece 13 is provided with the first bulge loop 114, and the first bulge loop 114 is located at the periphery of positioning through hole 113, the first installation
The diameter of through-hole 111 is greater than and the diameter of positioning through hole 113, in the radial outside of the first bulge loop 114, the of the first fixing piece 11
One end is smooth end face.The inner wall of first installation through-hole 111 is provided with internal screw thread, the external screw thread of the first connector 123 and
The internal screw thread of one installation through-hole 111 connects, and installs the first connector 123 in first installation through-hole 111, the first fiber stub
122 are stably installed in the first fixing piece 11, and the first fiber stub 122 passes through the first installation through-hole 111, the first convex
It is stretched in receiving opening 153 along 112 and positioning through hole 113.
Second optical fiber connector 14 includes the second fibre core 141, the second fiber stub 142 and the second connector 143, and second connects
Fitting 143 is provided through location hole, and the second fiber stub 142 is passed through and is fixed on the second connector 143, and second connects
The periphery of fitting 143 is provided with protrusion 143, and the outer surface of protrusion 143 is provided with external screw thread, clearance groove is arranged between bumps
144, protrusion and clearance groove 144 are uniformly circumferentially interspersed, and the second fibre core 141 along optical path direction protrudes into the second fiber stub
In 142, the end of the second fibre core 141 extends to the exit end of the second fiber stub 142, the signal light of the second fibre core 141 transmission
It is exported in the exit end of the second fiber stub 142.
Second fixing piece 13 can be made of steel, stainless steel or quartz, and the second fixing piece 13 is provided through along optical path direction
Second installation through-hole 131 and positioning through hole 133, the second installation through-hole 131 are provided with the second convex of annular radially inwards
Along 132, second convexes along 132 between the second installation through-hole 131 and positioning through hole 133, the second installation through-hole 131 setting
There is opening outwardly, positioning through hole 133 is provided with opening towards the second piezoelectric ceramics 152, and the second fixing piece 13 is in direction first
The second end face of fixing piece 11 is provided with the second bulge loop 134, and the second bulge loop 134 is located at the periphery of positioning through hole 133, the second installation
The diameter of through-hole 131 is greater than and the diameter of positioning through hole 133, in the radial outside of the second bulge loop 134, the of the second fixing piece 13
Two ends are smooth end face.The inner wall of second installation through-hole 131 is provided with internal screw thread, the external screw thread of the second connector 143 and
The internal screw thread of two installation through-holes 131 connects, and installs the second connector 143 in second installation through-hole 131, the second fiber stub
142 are stably installed in the second fixing piece 13, and the second fiber stub 142 passes through the second installation through-hole 131, the second convex
It is stretched in receiving opening 153 along 132 and positioning through hole 133.
Tuning block 15 includes the first piezoelectric ceramics 151 and the second piezoelectric ceramics 152 along optical path direction arrangement, the first pressure
Electroceramics 151 and the second piezoelectric ceramics 152 are arranged in a ring, the first piezoelectric ceramics 151 and the second piezoelectricity in the present embodiment
Ceramic 152 internal-and external diameters are all the same, and length of first piezoelectric ceramics 151 on optical path direction is greater than the second piezoelectric ceramics 152 and exists
Length on optical path direction, the i.e. axial length of the first piezoelectric ceramics 151 are greater than the axial length of the second piezoelectric ceramics 152, edge
Optical path direction is provided with receiving opening 153 through the first piezoelectric ceramics 151 and 152 ground of the second piezoelectric ceramics.
First piezoelectric ceramics 151 is connected between the first fixing piece 11 and the second piezoelectric ceramics 152,
Second piezoelectric ceramics 152 is connected between the first piezoelectric ceramics 151 and the second fixing piece 13, i.e. the first piezoelectric ceramics
151 connect in the first end of optical path direction with the first end face of the first fixing piece 11, and the first bulge loop 114 protrudes into receiving opening
In 153, the inner wall clearance fit of the first bulge loop 114 and receiving opening, the second end of first piezoelectric ceramics 151 in optical path direction
It is connect with the second piezoelectric ceramics 152 in the first end of optical path direction, the second end of second piezoelectric ceramics 152 in optical path direction
It is connect with the second end face of the second fixing piece 13, the second bulge loop 134 protrudes into receiving opening 153, and the second bulge loop 134 and receiving are logical
The inner wall clearance fit in hole, and the first piezoelectric ceramics 151 and the second piezoelectric ceramics 152 are coaxially arranged along optical path direction.First light
The exit end of the exit end of fine lock pin 122 and the second fiber stub 142 is positioned opposite in receiving opening 153, and the first optical fiber is inserted
Between the exit end of core 122 and the exit end of the second fiber stub 142 have gap, the exit end of the first fiber stub 122 and
F-P resonant cavity is formed between the exit end of second fiber stub 142.
By applying different driving signals to the first piezoelectric ceramics 151 and the second piezoelectric ceramics 152, so that piezoelectric ceramics
Deformation occurs comprising along the deformation of optical path direction, then have adjusted between the first fixing piece 11 and the second fixing piece 13 away from
From, the exit end of the first fiber stub 122 and the distance between the exit end of the second fiber stub 142 are finally had adjusted, thus
It realizes the subtle accurate adjusting to filtered band, and makes if what is applied to the first piezoelectric ceramics 151 is d. c. voltage signal
Global stability tunes filter frequencies at a slow speed, and makes if what is applied to the second piezoelectric ceramics 152 is high-frequency driving signal
Resonance occurs for the second piezoelectric ceramics 152, and filter is made to be in quick scanning mode.
Fast tunable filter second embodiment:
Referring to Fig. 4, on the basis of above-mentioned first embodiment, the tuning block of fast tunable filter may include the first pressure
Electroceramics 251, the second piezoelectric ceramics 252 and third piezoelectric ceramics 253, the first piezoelectric ceramics 251,252 and of the second piezoelectric ceramics
Third piezoelectric ceramics 253 is successively coaxially arranged along optical path direction, and length of first piezoelectric ceramics 151 on optical path direction is greater than the
Length of two piezoelectric ceramics 152 on optical path direction, length of second piezoelectric ceramics 152 on optical path direction are greater than third piezoelectricity
Length of the ceramics 253 on optical path direction, the first piezoelectric ceramics 251 are connected to the first fixing piece 11 and the second piezoelectric ceramics 252
Between, the second piezoelectric ceramics 252 is connected between the first piezoelectric ceramics 251 and third piezoelectric ceramics 253, third piezoelectric ceramics
253 are connected between the second fixing piece 13 and third piezoelectric ceramics 253.By respectively to the first piezoelectric ceramics 251, the second piezoelectricity
Ceramics 252 and third piezoelectric ceramics 253 apply different driving signals, then can be realized different filter patterns.
Fast tunable filter 3rd embodiment:
Referring to Fig. 5, on the basis of above-mentioned first embodiment, the tuning block of fast tunable filter can also be in the first pressure
Third fixing piece 16, the first piezoelectric ceramics 351, the second piezoelectric ceramics are provided between electroceramics 351 and the second piezoelectric ceramics 352
352 and third fixing piece 16 be arranged in a ring, receiving opening sequentially passes through the first piezoelectric ceramics 351,16 and of third fixing piece
Second piezoelectric ceramics 352, third fixing piece 16 are connected to the axial end face of the first piezoelectric ceramics 351 and the second piezoelectric ceramics 352
On, the first fiber stub 122 and the second fiber stub 142 are opposite in receiving opening.
Above scheme is presently preferred embodiments of the present invention, has more transformation, such as piezoelectric ceramics in practical applications
Connection type, other than in such a way that the first end face is connected, additionally it is possible to by the way of nesting, such as the second piezoelectric ceramics
First end cap the first piezoelectric ceramics outside, and the second end cap of the second piezoelectric ceramics is outside third piezoelectric ceramics, and uses
Using the scheme or optical fiber connector of three or more piezoelectric ceramics using other conventional connector schemes, these change
Become the purpose for being also that by this case, also in the protection scope of this case.
Therefore it is the exit end of the exit end of the first fiber stub and the second fiber stub is opposite in receiving opening
Arrangement then forms F-P resonant cavity, and utilizes the piezoelectric effect characteristic of piezoelectric ceramics, then to realize going out for fiber stub
The accurate adjusting for penetrating end spacing, makes filter accurately adjustable filtering, while using the setting of two piezoelectric ceramics, can will be to piezoelectricity
Ceramics export different driving signals, and such as a driving signal is DC control signal or low-frequency control signal, and another drives
Dynamic signal is high-frequency controling signal, so that this case filter can not only realize wide range of frequencies tuning at a slow speed, and also being capable of benefit
Quickly tuning and frequency scanning are realized with high-frequency vibration, it then being capable of faster and more accurately locking signal.
Claims (10)
1. fast tunable filter characterized by comprising
First fixing piece；
First optical fiber connector, first optical fiber connector include the first fibre core and the first fiber stub, first fibre core
It along optical path direction protrudes into first fiber stub, the first fiber stub is connect with first fixing piece；
Second fixing piece；
Second optical fiber connector, second optical fiber connector include the second fibre core and the second fiber stub, second fibre core
It along optical path direction protruding into second fiber stub, the second fiber stub is connect with second fixing piece, and described first
The exit end of fiber stub and the exit end of second fiber stub are positioned opposite；
Tuning block, the tuning block includes the first piezoelectric ceramics and the second piezoelectric ceramics along optical path direction arrangement, described
First piezoelectric ceramics is connected between first fixing piece and second piezoelectric ceramics, and second piezoelectric ceramics is connected to
Between first piezoelectric ceramics and second fixing piece.
2. fast tunable filter according to claim 1, it is characterised in that:
First piezoelectric ceramics is connect in the first end of optical path direction with first fixing piece, first piezoelectric ceramics
It is connect with second piezoelectric ceramics in the first end of optical path direction in the second end of optical path direction, the second piezoelectricity pottery
Porcelain is connect in the second end of optical path direction with second fixing piece.
3. fast tunable filter according to claim 2, it is characterised in that:
Length of first piezoelectric ceramics on optical path direction is greater than length of second piezoelectric ceramics on optical path direction.
4. fast tunable filter according to claim 2, it is characterised in that:
First piezoelectric ceramics and second piezoelectric ceramics are arranged in a ring, run through first piezoelectricity along optical path direction
It is provided with receiving opening, the exit end of first fiber stub and second optical fiber to ceramic and described second piezoelectric ceramics
The exit end of lock pin is positioned opposite in the receiving opening.
5. fast tunable filter according to claim 4, it is characterised in that:
First fixing piece is provided through the first installation through-hole along optical path direction, and second fixing piece is passed through along optical path direction
It wears and is equipped with the second installation through-hole, first installation through-hole, the receiving opening and second installation through-hole are sequentially communicated；
First optical fiber connector includes the first connector, and first fiber stub is fixed at first connector
On, first fiber stub passes through first installation through-hole, and first connector is installed in first installation through-hole；
Second optical fiber connector includes the second connector, and second fiber stub is fixed at second connector
On, second fiber stub passes through second installation through-hole, and second connector is installed in second installation through-hole.
6. fast tunable filter according to claim 4, it is characterised in that:
First fixing piece is provided with the first bulge loop, the first piezoelectricity pottery in the first end face towards second fixing piece
The first end of porcelain is connect with the first end face of first fixing piece, and first bulge loop protrudes into the receiving opening；
Second fixing piece is provided with the second bulge loop, the second piezoelectricity pottery in the second end face towards first fixing piece
The second end of porcelain is connect with the second end face of second fixing piece, and second bulge loop protrudes into the receiving opening.
7. fast tunable filter according to claim 1, it is characterised in that:
First fixing piece and/or second fixing piece are made of steel, stainless steel or quartz.
8. fast tunable filter according to any one of claims 1 to 7, it is characterised in that:
The fast tunable filter further includes third fixing piece, the third fixing piece be connected to first piezoelectric ceramics and
Between second piezoelectric ceramics.
9. fast tunable filter according to any one of claims 1 to 7, it is characterised in that:
The tuning block includes the third piezoelectric ceramics along optical path direction arrangement, and the third piezoelectric ceramics is connected to described the
Between two piezoelectric ceramics and second fixing piece.
10. fast tunable filter according to claim 9, it is characterised in that:
Length of first piezoelectric ceramics on optical path direction is greater than length of second piezoelectric ceramics on optical path direction,
Length of second piezoelectric ceramics on optical path direction is greater than length of the third piezoelectric ceramics on optical path direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598447.8A CN109491018A (en) | 2018-12-25 | 2018-12-25 | Fast tunable filter |
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| CN201811598447.8A CN109491018A (en) | 2018-12-25 | 2018-12-25 | Fast tunable filter |
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| CN109491018A true CN109491018A (en) | 2019-03-19 |
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| CN1503018A (en) * | 2002-11-21 | 2004-06-09 | 强 陆 | Connector |
| CN2593217Y (en) * | 2002-12-26 | 2003-12-17 | 上海紫珊光电技术有限公司 | Tunable optical fiber FP filter |
| CN101183163A (en) * | 2007-11-21 | 2008-05-21 | 北京理工大学 | Turnning optical fibre method Fabry-perot filter |
| CN101478345A (en) * | 2009-01-17 | 2009-07-08 | 大连理工大学 | Tunable microwave signal generator |
| CN203204241U (en) * | 2013-04-01 | 2013-09-18 | 北京铟尼镭斯技术有限公司 | Fabry Perot cavity |
| CN104618029A (en) * | 2014-12-18 | 2015-05-13 | 武汉光迅科技股份有限公司 | Adjustable optical receiver applied to TWDM-PON system and adjustable filter thereof |
| CN104698585A (en) * | 2015-04-01 | 2015-06-10 | 武汉理工大学 | Adjustable optical fiber f-p filter |
| CN109557617A (en) * | 2018-12-25 | 2019-04-02 | 珠海光库科技股份有限公司 | Tunable filter |
| CN209327614U (en) * | 2018-12-25 | 2019-08-30 | 珠海光库科技股份有限公司 | Tunable filter |
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