CN106896449B - Couple the bandpass filter of optical fiber and Echo Wall microcavity - Google Patents
Couple the bandpass filter of optical fiber and Echo Wall microcavity Download PDFInfo
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- CN106896449B CN106896449B CN201710308380.9A CN201710308380A CN106896449B CN 106896449 B CN106896449 B CN 106896449B CN 201710308380 A CN201710308380 A CN 201710308380A CN 106896449 B CN106896449 B CN 106896449B
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- optical fiber
- echo wall
- wall microcavity
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- microcavity
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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
- G02B6/29331—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 evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29337—Cavities of the linear kind, e.g. formed by reflectors at ends of a light guide
-
- 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
- G02B6/29331—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 evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
- G02B6/2934—Fibre ring resonators, e.g. fibre coils
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The present invention provides a kind of bandpass filter for coupling optical fiber and Echo Wall microcavity, including the first optical fiber, second optical fiber and Echo Wall microcavity, the insertion of Echo Wall microcavity, which is placed between the first optical fiber and the second optical fiber and respectively with the first optical fiber and the second optical fiber, intersects, it is abutted there are gap between the bottom end of intersection Echo Wall microcavity and the remaining fibre core of the second optical fiber and with the two sides of the remaining fibre core of the second optical fiber, so that the input light of second optical fiber optical wrap Echo Wall microcavity in part when being transferred to gap location is transmitted and is transferred out along the fibre core of the first optical fiber, remaining light is transferred out along the remaining fibre core of the second optical fiber, wherein the output end of the second optical fiber constitutes band resistance output end, the output end of first optical fiber constitutes band logical output end.By the invention it is possible to realize band logical and bandreject filtering simultaneously, and the Stability and adaptability of filter can be improved.
Description
Technical field
The invention belongs to technical field of filtering, and in particular to a kind of bandpass filter for coupling optical fiber and Echo Wall microcavity.
Background technique
It is usually real using Echo Wall microcavity in filtering field since Echo Wall microcavity has the function of narrow-band filtering
Existing bandreject filtering.But it not only needs to realize that bandreject filtering function also needs to realize band-pass filtering function in some applications.For
Realization band-pass filtering function, usually places additional coupler, such as will be common in Echo Wall microcavity resonance structure at present
The diameter of section of optical fiber draws cone at tapered fiber, prism optical fiber and the grinding optical fiber etc. less than 2 μm.Wherein, tapered fiber itself
Physical strength it is lower and vulnerable to pollution, although the physical strength of prism coupler is high bulky and does not have mode and selects
Selecting property, angle grinding optical fiber is small in size but has directional dependence.In addition, what above-mentioned three kinds of couplers and Echo Wall microcavity were constituted
Filter stability is poor, and the central wavelength of filter and its percent of pass change with the couple state of Echo Wall microcavity.
It can be seen that there are adaptability and stability are poor when realizing band-pass filtering function using Echo Wall microcavity in the prior art
Problem.
Summary of the invention
The present invention provides a kind of bandpass filter for coupling optical fiber and Echo Wall microcavity, to solve coupling optical fiber at present and return
Existing adaptability and stability poor problem when sound wall microcavity realizes bandpass filtering.By to being input to Echo Wall microcavity
The tune that can also realize the band-pass wavelength of bandpass filter is adjusted in the material of corresponding parameter and/or filling to Echo Wall microcavity
It is humorous.
According to a first aspect of the embodiments of the present invention, a kind of bandpass filter coupling optical fiber and Echo Wall microcavity is provided,
Including the first optical fiber, the second optical fiber and Echo Wall microcavity, the Echo Wall microcavity insertion is placed in first optical fiber and second
Intersect between optical fiber and respectively with first optical fiber and the second optical fiber, the bottom end of Echo Wall microcavity described in intersection with it is described
It is abutted there are gap between the remaining fibre core of second optical fiber and with the two sides of the remaining fibre core of second optical fiber, so that described
The transmission of Echo Wall microcavity described in the optical wrap of part and along described the when being transferred to the gap location of the input light of second optical fiber
The fibre core of one optical fiber transfers out, and remaining light is transferred out along the remaining fibre core of second optical fiber, wherein second light
Fine output end constitutes band resistance output end, and the output end of first optical fiber constitutes band logical output end.
In an optional implementation manner, the top of Echo Wall microcavity described in intersection and first optical fiber is surplus
It is abutted between remaining light fibre there are gap and with the two sides of the remaining fibre core of first optical fiber, first optical fiber and the second light
Fine structure is identical and identical as the connection type of the Echo Wall microcavity.
In another optional implementation, the top of the Echo Wall microcavity connects with the fibre core of first optical fiber
Touching.
In another optional implementation, bottom surface structure, the bottom surface structure edge are offered in second optical fiber
The two sides of second fiber length are contour and centerline axis parallel with second optical fiber, the Echo Wall microcavity
It is placed on the bottom surface structure and intersects with second optical fiber, the bottom end of Echo Wall microcavity described in intersection and the bottom
The two sides of face structure abut, and the remaining fibre core for second optical fiber being located between the two sides of the bottom surface structure and institute
Stating Echo Wall microcavity, there are gaps.
Remaining fibre core upper surface quilt in another optional implementation, between the bottom surface structure two sides
It is made and the centerline axis parallel and the short plane in the bottom surface structure two sides.
Remaining fibre core upper surface quilt in another optional implementation, between the bottom surface structure two sides
It is made using the fibre core center of circle as the Inner arc of dot.
In another optional implementation, the remaining fibre core two sides of second optical fiber are provided with and the central axis
Line is parallel and the short plane in the bottom surface structure two sides.
In another optional implementation, the diameter of section of second optical fiber is greater than 2 μm, the minimum in the gap
Value is less than or equal to 1.5 μm.
In another optional implementation, by the correspondence parameter for being input to the Echo Wall microcavity and/or filling out
The band-pass wavelength that the material of the Echo Wall microcavity is adjusted to export the band logical output end is charged to be tuned.
In another optional implementation, first optical fiber, the second optical fiber and Echo Wall microcavity are embedding in intersection
Enter in the groove being mounted in substrate.
The beneficial effects of the present invention are:
1, the present invention excites Echo Wall microcavity mode much larger than the ordinary optic fibre of tapered fiber by using diameter of section,
The physical strength of device can be improved, it, can't be since the stability of whole device is preferable to improve the stability of device
The reduction of quality factor is caused in use process, therefore quality of the invention is more preferable；By making the second optical fiber and Echo Wall microcavity
Intersection, gets rid of the segment core of the second optical fiber in intersection, the second optical fiber input light can be made to have portion when being transmitted to intersection
Light splitting is overflowed, and by abutting Echo Wall microcavity and the two sides of the second optical fiber residue fibre core, optical fiber can be made micro- with the Echo Wall
Closed circuit is formed between chamber, so as to so that the part optical wrap Echo Wall microcavity overflowed is transmitted, by making the second light
There are gaps between fine residue fibre core and Echo Wall microcavity, it is ensured that the second optical fiber can excite Echo Wall microcavity mode；This
Invention can carry out band logical and bandreject filtering to the input light of the second optical fiber by above structure；
2, the first optical fiber, the second optical fiber are identical as the connection type of Echo Wall microcavity in the present invention, so no matter from first
Optical fiber or the second optical fiber input light, can realize band logical and bandreject filtering, so as to improve the adaptability of whole device；
3, by the present invention in that the upper surface of the remaining fibre core between the two sides is made into fibre core circle
The heart is the Inner arc of dot, can reduce insertion loss；
4, the present invention in the remaining fibre core two sides by being provided with and the centerline axis parallel and short in the two sides
The plane in face can advantageously reduce fibre core exposed surface difficulty of processing；
5, by the present invention in that the minimum value in gap is less than or equal to 1.5 μm, it is ensured that optical fiber can activate echo
Wall microcavity mode；
6, the present invention passes through to the correspondence parameter and/or filling for being input to the Echo Wall microcavity to the Echo Wall microcavity
Material be adjusted to the band logical output end output band-pass wavelength and with resistance output end output band wave arrestment progress
Row tuning；
7, the present invention, can by the way that the insertion of the first optical fiber, the second optical fiber and Echo Wall microcavity to be mounted in the groove of substrate
To improve the stability of device.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the bandpass filter of present invention coupling optical fiber and Echo Wall microcavity；
Fig. 2 is that the second optical fiber is connect with Echo Wall microcavity in the bandpass filter of present invention coupling optical fiber and Echo Wall microcavity
The first embodiment main view of mode；
Fig. 3 is that the second optical fiber is connect with Echo Wall microcavity in the bandpass filter of present invention coupling optical fiber and Echo Wall microcavity
The first embodiment side view of mode；
Fig. 4 is that the second optical fiber is connect with Echo Wall microcavity in the bandpass filter of present invention coupling optical fiber and Echo Wall microcavity
The second embodiment main view of mode；
Fig. 5 is that the second optical fiber is connect with Echo Wall microcavity in the bandpass filter of present invention coupling optical fiber and Echo Wall microcavity
The second embodiment side view of mode.
Specific embodiment
Technical solution in embodiment in order to enable those skilled in the art to better understand the present invention, and make of the invention real
The above objects, features, and advantages for applying example can be more obvious and easy to understand, with reference to the accompanying drawing to technical side in the embodiment of the present invention
Case is described in further detail.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " connection " should do broad sense reason
Solution, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can be directly connected, it can also
Indirectly connected through an intermediary, for the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term.
Referring to Fig. 1, for one embodiment structural representation of present invention coupling optical fiber and the bandpass filter of Echo Wall microcavity
Figure.The bandpass filter of the coupling optical fiber and Echo Wall microcavity may include the first optical fiber 110, the second optical fiber 120 and the Echo Wall
Microcavity 130, the Echo Wall microcavity 130 insertion be placed between first optical fiber 110 and the second optical fiber 120 and respectively with institute
State the first optical fiber 110 and the intersection of the second optical fiber 120, the bottom end of Echo Wall microcavity 130 described in intersection and second optical fiber
It is abutted there are gap between 120 remaining fibre core and with the two sides of the remaining fibre core of second optical fiber 120, so that described
The input light of two optical fiber 120 Echo Wall microcavity 130 described in the optical wrap of part when being transferred to the gap location transmits and along institute
The fibre core for stating the first optical fiber 110 transfers out, and remaining light is transferred out along the remaining fibre core of second optical fiber 120, wherein
The output end of second optical fiber 120 constitutes band resistance output end, and the output end of first optical fiber 110 constitutes band logical output end.
In the present embodiment, first optical fiber 110 and the second optical fiber 120 can be ordinary optic fibre, and diameter of section is usual
Much larger than 2 μm, such as diameter of section is 62.5 μm.Since the diameter of the ordinary optic fibre of the invention used is far longer than tapered fiber
Diameter of section, the physical strength of ordinary optic fibre is much higher than the physical strength of tapered fiber, therefore the object of whole device of the present invention
Reason intensity is improved, and stability is more preferable.In addition, the first optical fiber 110, the second optical fiber 120 can be with Echo Wall microcavitys 130
It intersects vertically, in intersection, the segment core of the second optical fiber 120 will be processed, defeated when the second optical fiber 120 in this way
Part light is just had when entering optical transport to intersection to overflow.In intersection, there are two sides for the two sides of the remaining fibre core of the second optical fiber 120
Face, the bottom end of Echo Wall microcavity 130 are abutted with the two sides, and such Echo Wall microcavity 130 and 120 intersection of the second optical fiber are by shape
At a closed circuit, the part light of spilling can just be transmitted around Echo Wall microcavity 130.In addition, the present invention passes through remaining fine
Certain interval is set between core and Echo Wall microcavity 130, it is ensured that the second optical fiber can excite Echo Wall microcavity mode.In order to
It is further ensured that the second optical fiber can excite Echo Wall microcavity mode, remaining fibre core is most short with the Echo Wall microcavity 130
Distance d is less than or equal to 1.5 μm.In order to improve the stability of device, the present invention can be by the first optical fiber 110, the second optical fiber
120 and Echo Wall microcavity 130 the groove that is mounted in substrate of intersection insertion in.
In order to guarantee that the part light for surrounding the transmission of Echo Wall microcavity 130 can transmit out along the fibre core of the first optical fiber 110
It goes, in one implementation, the top of Echo Wall microcavity 130 can be in contact with the fibre core of the first optical fiber 110.At this time when need
When carrying out band logical and bandreject filtering, after receiving input light, input light can be along the second light for one end of the second optical fiber 120
The fibre core of fibre 120 is transferred to the intersection of itself and Echo Wall microcavity 130, in intersection since the fibre core of the second optical fiber 120 is by portion
Divide removal, therefore is divided to overflow and surround from the bottom end of Echo Wall microcavity 130 in the middle part of input light and is transferred to its top.Due to returning
The top of sound wall microcavity 130 is in contact with the fibre core of the first optical fiber 110, therefore is transmitted to the part on 130 top of Echo Wall microcavity
Light can be transferred out along the fibre core of the first optical fiber 110, to realize bandpass filtering.In addition, removing spilling in intersection
Part light, the remaining light in input light still can be transferred out along the remaining fibre core of the second optical fiber 120, to realize band resistance filter
Wave.
It in another implementation, can be with the residue of the first optical fiber 110 on the top of intersection Echo Wall microcavity 130
It is abutted there are gap between optical fiber and with the two sides of the remaining fibre core of the first optical fiber 110.Wherein, in the first optical fiber of intersection
110 segment core will be processed, and just have portion when the input light of the first optical fiber 110 is transferred to intersection in this way
Light splitting is overflowed.In intersection, the two sides of the remaining fibre core of the first optical fiber 110 are there are two sides, the top of Echo Wall microcavity 130 with should
Two sides abut, and such Echo Wall microcavity 130 and 120 intersection of the second optical fiber will form a closed circuit, the part of spilling
Light can just be transmitted around Echo Wall microcavity 130.In addition, the present invention passes through in the remaining fibre core of the first optical fiber 110 and Echo Wall microcavity
Certain interval is set between 130, it is ensured that the first optical fiber 110 can excite Echo Wall microcavity mode.At this time when needing to carry out
When band logical and bandreject filtering, after receiving input light, input light can be along the second optical fiber 120 for one end of the second optical fiber 120
Fibre core be transferred to the intersection of itself and Echo Wall microcavity 130, in intersection since the fibre core of the second optical fiber 120 is partially gone
It removes, therefore is divided to overflow and surround from the bottom end of Echo Wall microcavity 130 in the middle part of input light and is transferred to its top.Due to the Echo Wall
Although one has been crossed to form between the top of microcavity 130 and the fibre core of the first optical fiber 110 there are certain gap but between the two
A closed circuit, therefore the part light for being transmitted to 130 top of Echo Wall microcavity can be transferred on the fibre core of the first optical fiber 110
And transferred out along the fibre core of the first optical fiber 110, to realize bandpass filtering.In addition, removing the part overflowed in intersection
Light, the remaining light in input light still can be transferred out along the remaining fibre core of the second optical fiber 120, to realize bandreject filtering.
The structure of the first optical fiber and the second optical fiber is identical and identical as the connection type of Echo Wall microcavity in the present invention, so no matter from
One optical fiber or the second optical fiber input light, can realize band logical and bandreject filtering, so as to improve the adaptation of whole device
Property.
In addition, through applicants have found that, when on Echo Wall microcavity 130 transmission have corresponding parameter (such as electric current, light wave and
Sound wave etc.) when, in the intersection of Echo Wall microcavity 130 and the second optical fiber 120, the correspondence parameter that is transmitted on Echo Wall microcavity 130
It will influence each other with the light wave transmitted on the second optical fiber 120, and transmit corresponding parameter and the on Echo Wall microcavity 130 to change
Two optical fiber 120 upload the wavelength for losing wave.And the size of the correspondence parameter transmitted on Echo Wall microcavity 130 not only be input to
The parameter size of Echo Wall microcavity 130 is related, also related with the material (type and how many etc.) filled in Echo Wall microcavity 130,
Therefore, when carrying out band logical and bandreject filtering, if necessary to the band-pass wavelength to the output of band logical output end and with resistance output end
The band wave arrestment length of output is tuned, then to the correspondence parameter for being input to the Echo Wall microcavity and/or can be filled to described
The material of Echo Wall microcavity is adjusted.
As seen from the above-described embodiment, the present invention is excited by using diameter of section much larger than the ordinary optic fibre of tapered fiber
Echo Wall microcavity mode, can be improved the physical strength of device, so that the stability of device is improved, due to the stabilization of whole device
Property is preferable, can't cause the reduction of quality factor in use, therefore quality of the invention is more preferable；By making the second light
Fibre intersects with Echo Wall microcavity, gets rid of the segment core of the second optical fiber in intersection, and the second optical fiber can be made to input optical transport
There is light spilling in part when to intersection, by abutting Echo Wall microcavity and the two sides of the second optical fiber residue fibre core, can make
Closed circuit is formed between optical fiber and Echo Wall microcavity, so as to so that the part optical wrap Echo Wall microcavity overflowed is passed
Defeated, by making between the second optical fiber residue fibre core and Echo Wall microcavity, there are gaps, it is ensured that the second optical fiber can excite back
Sound wall microcavity mode.The present invention can carry out band logical and bandreject filtering to the input light of the second optical fiber by above structure.
Referring to fig. 2 with 3, it is followed successively by the bandpass filter of present invention coupling optical fiber and Echo Wall microcavity the second optical fiber and returns
The first embodiment main view and side view of sound wall microcavity connection type.Bottom surface structure 140 is offered in the second optical fiber 120,
The bottom surface structure 140 is contour and with second optical fiber 120 along the two sides 141 of 120 length direction of the second optical fiber
Centerline axis parallel, the Echo Wall microcavity 130 insertion be placed on the bottom surface structure 140 in second optical fiber 120 and with
Second optical fiber 120 intersects, and in intersection, the bottom end of Echo Wall microcavity 130 is abutted with the two sides 141, and is located at described
There are gaps between the remaining fibre core 121 and Echo Wall microcavity 130 of the second optical fiber 120 between two sides 141.Wherein it is located at two
The upper surface of remaining fibre core 121 between side 141 can be made into and 121 centerline axis parallel of fibre core and short in two sides
141 plane.
In the present embodiment, when making apparatus of the present invention, rubbing down or lithographic technique can be used the second optical fiber first
The D type structure of bottom surface Yu 121 centerline axis parallel of fibre core is made in 120 a part, when making D type structure by rubbing down or etching
Fall segment core, so that the fibre core upper surface at bottom center position is the plane with 121 centerline axis parallel of fibre core.Then it adopts
The fibre core surface at bottom center position is handled with rubbing down, etching or micro-nano technology technology, so that bottom center position
The fibre core surface for setting place is still parallel with core centre axis, but short in its two sides 141.
As seen from the above-described embodiment, the present invention is excited by using diameter of section much larger than the ordinary optic fibre of tapered fiber
Echo Wall microcavity mode, can be improved the physical strength of device, so that the stability of device is improved, due to the stabilization of whole device
Property is preferable, can't cause the reduction of quality factor in use, therefore quality of the invention is more preferable；By making the second light
Fibre intersects with Echo Wall microcavity, gets rid of the segment core of the second optical fiber in intersection, and the second optical fiber can be made to input optical transport
There is light spilling in part when to intersection, by abutting Echo Wall microcavity and the two sides of the second optical fiber residue fibre core, can make
Closed circuit is formed between optical fiber and Echo Wall microcavity, so as to so that the part optical wrap Echo Wall microcavity overflowed is passed
Defeated, by making between the second optical fiber residue fibre core and Echo Wall microcavity, there are gaps, it is ensured that the second optical fiber can excite back
Sound wall microcavity mode.The present invention can carry out band logical and bandreject filtering to the input light of the second optical fiber by above structure.
Referring to fig. 4 with 5, it is followed successively by the bandpass filter of present invention coupling optical fiber and Echo Wall microcavity the second optical fiber and returns
The main view and side view of the second embodiment of the connection type of sound wall microcavity.Bottom surface structure is offered in the second optical fiber 120
140, the bottom surface structure 140 it is contour along the two sides 141 of 120 length direction of the second optical fiber and with second optical fiber
120 centerline axis parallel, the insertion of Echo Wall microcavity 130 are placed on the bottom surface structure 140 in second optical fiber 120
And intersect with second optical fiber 120, in intersection, the bottom end of Echo Wall microcavity 130 is abutted with the two sides 141, and is located at
There are gaps between the remaining fibre core 121 and Echo Wall microcavity 130 of the second optical fiber 120 between the two sides 141.Wherein,
The upper surface of remaining fibre core 121 between two sides 141 can be made into using 111 center of circle of fibre core as the Inner arc of dot.
In the present embodiment, when making apparatus of the present invention, rubbing down or lithographic technique can be used the second optical fiber first
The D type structure of bottom surface Yu 121 centerline axis parallel of fibre core is made in 120 a part, when making D type structure along with fibre core
121 tangent directions only carry out rubbing down or etching to the covering of the second optical fiber, to form bottom surface and the tangent D of fibre core 121
Type structure.Then it can be located at 121 two sides of fibre core, selected (this position and core centre at the identical position of fibre core
The horizontal distance of axis is less than or equal to fiber core radius), it is done further using covering of the micro-nano technology technology to the second optical fiber
Processing, until the fibre core surface below D type structure is exposed.Further exposed fibre core is added after exposing fibre core surface
Work, so that the thickness of the exposed surface of fibre core is cut out d (d is less than or equal to 1.5 μm), to make the exposed surface of fibre core
It is formed using the fibre core center of circle as the Inner arc of dot.
D type structure is being made, when the covering of the second optical fiber is further processed in the identical position of selected distance fibre core,
Selected location and the horizontal distance of core centre axis can be made to be greater than fiber core radius and (further throw to the second fibre cladding at this time
The depth of mill or etching should be less than the diameter of fibre core), it needs to keep working depth small in this way when covering is further processed
Processing is carried out until touching fibre further along horizontal direction in the diameter of fibre core, and when working depth reaches preset depth
Core later removes the covering of fibre core surface covering, until the fibre core surface below D type structure is exposed, works as fibre core in this way
After being further processed, remaining fibre core two sides will be formed and centerline axis parallel and the short plane in two sides 141, thus
Remaining fibre core two sides form certain convolution space.Due to if it is desired that the exposed surface of fibre core is made into the fibre core center of circle as circle
The Inner arc of point, then need to process fibre core surface along center of circle direction from each different directions, therefore exposed in fibre core
Certain convolution space is set around surface, advantageously reduces fibre core exposed surface difficulty of processing.Due to compared to Fig. 2 and Fig. 3
Shown first embodiment, remaining fibre core is more in the present embodiment, therefore the present embodiment can further decrease insertion loss.
As seen from the above-described embodiment, the present invention is excited by using diameter of section much larger than the ordinary optic fibre of tapered fiber
Echo Wall microcavity mode, can be improved the physical strength of device, so that the stability of device is improved, due to the stabilization of whole device
Property is preferable, can't cause the reduction of quality factor in use, therefore quality of the invention is more preferable；By making the second light
Fibre intersects with Echo Wall microcavity, gets rid of the segment core of the second optical fiber in intersection, and the second optical fiber can be made to input optical transport
There is light spilling in part when to intersection, by abutting Echo Wall microcavity and the two sides of the second optical fiber residue fibre core, can make
Closed circuit is formed between optical fiber and Echo Wall microcavity, so as to so that the part optical wrap Echo Wall microcavity overflowed is passed
Defeated, by making between the second optical fiber residue fibre core and Echo Wall microcavity, there are gaps, it is ensured that the second optical fiber can excite back
Sound wall microcavity mode.The present invention can carry out band logical and bandreject filtering to the input light of the second optical fiber by above structure.
It is to be noted that the first optical fiber can be identical and with Echo Wall microcavity with the structure of the second optical fiber in the present invention
Connection type can also be identical, thus the specific structure no longer to the first optical fiber and its connection type with Echo Wall microcavity herein
It repeats.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (9)
1. it is a kind of couple optical fiber and Echo Wall microcavity bandpass filter, which is characterized in that including the first optical fiber, the second optical fiber and
Echo Wall microcavity, Echo Wall microcavity insertion are placed between first optical fiber and the second optical fiber and respectively with described first
Optical fiber and the intersection of the second optical fiber, are deposited between the bottom end of Echo Wall microcavity described in intersection and the remaining fibre core of second optical fiber
It is abutted in gap and with the two sides of the remaining fibre core of second optical fiber, so that the input light of second optical fiber is being transferred to
Echo Wall microcavity described in the optical wrap of part is transmitted and is transferred out along the fibre core of first optical fiber when gap location, remaining
Light is transferred out along the remaining fibre core of second optical fiber, wherein the output end of second optical fiber constitutes band resistance output end,
The diameter of section of the output end composition band logical output end of first optical fiber, first optical fiber and the second optical fiber is greater than 2 μm, institute
The minimum value for stating gap is less than or equal to 1.5 μm.
2. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 1, which is characterized in that in intersection
There are gaps and surplus with first optical fiber between the top of the Echo Wall microcavity and the remaining optical fiber of first optical fiber
The two sides of remaining fibre core abut, and first optical fiber is identical as the structure of the second optical fiber and connection side with the Echo Wall microcavity
Formula is identical.
3. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 1, which is characterized in that the echo
The top of wall microcavity is in contact with the fibre core of first optical fiber.
4. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 1 or 2, which is characterized in that described
Offer bottom surface structure in second optical fiber, the bottom surface structure it is contour along the two sides of second fiber length and with institute
State the centerline axis parallel of the second optical fiber, the Echo Wall microcavity be placed on the bottom surface structure and with the second optical fiber phase
It hands over, the bottom end of Echo Wall microcavity described in intersection is abutted with the two sides of the bottom surface structure, and is located at the bottom surface structure
Two sides between the remaining fibre core of second optical fiber there are gaps with the Echo Wall microcavity.
5. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 4, which is characterized in that be located at described
Remaining fibre core upper surface between bottom surface structure two sides is made into and the centerline axis parallel and short in the bottom surface structure
The plane of two sides.
6. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 4, which is characterized in that be located at described
Remaining fibre core upper surface between bottom surface structure two sides is made into using the fibre core center of circle as the Inner arc of dot.
7. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 6, which is characterized in that described second
The remaining fibre core two sides of optical fiber are provided with and the centerline axis parallel and the short plane in the bottom surface structure two sides.
8. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 1 or 2, which is characterized in that pass through
The material of the correspondence parameter and/or filling to the Echo Wall microcavity that are input to the Echo Wall microcavity is adjusted to institute
The band wave arrestment length of the band-pass wavelength and band resistance output end output of stating the output of band logical output end is tuned.
9. the bandpass filter of coupling optical fiber and Echo Wall microcavity according to claim 1, which is characterized in that described first
Optical fiber, the second optical fiber and Echo Wall microcavity are in the groove that intersection insertion is mounted in substrate.
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| CN108318064B (en) * | 2018-01-19 | 2019-06-11 | 东北大学 | For improving the integrated chip of optical fiber Echo Wall microcavity sensors stability |
| CN111458797A (en) * | 2020-04-27 | 2020-07-28 | 汕头大学 | Micro-tube whispering gallery mode coupling device and manufacturing method thereof |
| CN111487724B (en) * | 2020-04-27 | 2021-06-01 | 重庆大学 | In-fiber transmission band-pass echo wall micro-cavity filter and manufacturing method thereof |
| CN113799386A (en) * | 2021-10-08 | 2021-12-17 | 天津工业大学 | Double-coupling whispering gallery mode microcavity based on stereolithography 3D printing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038355A (en) * | 2007-04-20 | 2007-09-19 | 浙江大学 | All-optical-fiber add-drop wave filter based on micro-optical ring junction resonant chamber |
| CN103091831A (en) * | 2013-01-14 | 2013-05-08 | 南京大学 | Tunable optical filter and application thereof |
| CN105633519A (en) * | 2016-03-11 | 2016-06-01 | 中国科学技术大学 | Stable tuning Add-drop filter based on bottleneck-shaped echo wall mode microcavity |
-
2017
- 2017-05-04 CN CN201710308380.9A patent/CN106896449B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038355A (en) * | 2007-04-20 | 2007-09-19 | 浙江大学 | All-optical-fiber add-drop wave filter based on micro-optical ring junction resonant chamber |
| CN103091831A (en) * | 2013-01-14 | 2013-05-08 | 南京大学 | Tunable optical filter and application thereof |
| CN105633519A (en) * | 2016-03-11 | 2016-06-01 | 中国科学技术大学 | Stable tuning Add-drop filter based on bottleneck-shaped echo wall mode microcavity |
Non-Patent Citations (2)
| Title |
|---|
| 回音壁模式球微腔的制备及其应用研究;王聪;《浙江师范大学硕士学位论文》;20160330;全文 |
| 基于回音壁模混合介质微球腔的窄带光滤波器研究;万洪丹 杨超麟 王瑾 许吉;《全国第17次光纤通信暨第18届集成光学学术会议》;20170109;全文 |
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