CN107941335A - Sensor fibre and fibre-optical sensing device - Google Patents
Sensor fibre and fibre-optical sensing device Download PDFInfo
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- CN107941335A CN107941335A CN201710954529.0A CN201710954529A CN107941335A CN 107941335 A CN107941335 A CN 107941335A CN 201710954529 A CN201710954529 A CN 201710954529A CN 107941335 A CN107941335 A CN 107941335A
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- 239000000835 fiber Substances 0.000 title claims abstract description 85
- 239000013307 optical fiber Substances 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 238000005253 cladding Methods 0.000 claims abstract description 35
- 239000000126 substance Substances 0.000 claims abstract description 33
- 238000003466 welding Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000039 congener Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/023—Microstructured optical fibre having different index layers arranged around the core for guiding light by reflection, i.e. 1D crystal, e.g. omniguide
- G02B6/02304—Core having lower refractive index than cladding, e.g. air filled, hollow core
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a kind of sensor fibre, the sensor fibre is hollow antiresonance optical fiber；The hollow antiresonance optical fiber includes cladding regions, hollow pipe and the core region surrounded by the cladding regions being made of microcapillary；The hollow pipe is socketed in the outside of the cladding regions；The refractive index of the core region is less than the refractive index of the cladding regions；For multiple pre-selected locations groups on the hollow pipe side, through hole is provided with each pre-selected locations in each pre-selected locations group, all pre-selected locations in each pre-selected locations group are arranged along the central axis direction of the sensor fibre.When detecting a variety of test substances, it is possible to reduce the number of welding and the cut-out of sensor fibre, reduces the workload of detection, improves the accuracy of testing result.
Description
Technical field
The present invention relates to optics and laser optoelectronic technical field, is filled more particularly, to sensor fibre and Fibre Optical Sensor
Put.
Background technology
At present, as the development and progress of science and technology, optical fiber sensing technology have been widely used.Such as temperature, pressure, flow,
The physical quantitys such as displacement, vibration, rotation, bending, liquid level, speed, acceleration, sound field, electric current, voltage, magnetic field and radiation pass through
Optical fiber realizes the sensing of different performance.
Optical fiber sensing technology includes two kinds of functions of perception and transmission to test substance.Perception refers to outer signals according to it
Changing rule makes the physical features parameter of the light wave transmitted in optical fiber, such as intensity (power), wavelength, frequency, phase and polarization state
Etc. changing, the change for measuring optical parameter " perceives " test substance.This substantially test substance that perceives is in optical fiber
The light wave of propagation carries out modulated in real time.Transmission refers to that optical fiber will be subject to the light wave transmissions that test substance is modulated to be carried out to optical detector
Detection, test substance is extracted from light wave and carries out data processing on demand, that is, is demodulated.Therefore, Fibre Optical Sensor
Technology includes technology of both modulation and demodulation, i.e., outer signals how the modulation technique of the light wave parameter in modulation optical fiber
(or loading technique) and the demodulation techniques (or detection technique) that outer signals how are extracted from the light wave modulated.Wherein, this
Kind test substance may include gas, liquid, electric field or magnetic field, certain signal etc..
Critical piece in optical fiber sensing technology is sensor fibre, that is, in sensor fibre outer signals to light wave
Parameter is modulated.The launching fiber of sensor fibre one end and light source couples connects, the reception that the other end is coupled with optical detector
Optical fiber connects.
The sensor fibre used in existing optical fiber sensing technology is common solid core optical fiber, in the process of Fibre Optical Sensor
In, an outer signals are often detected, sensor fibre of reclosing is required for, this outer signals is imported the fibre of sensor fibre
Core, is modulated the light beam propagated at the fibre core of sensor fibre by outer signals, and the light beam of output is analyzed, most
Final inspection measures this outer signals.During due to a kind of test substance of every detection, it is required for connecing a sensor fibre again, it is more detecting
The welding and cut-out of multiple sensor fibre can be then carried out during kind test substance, the workload when measuring a variety of test substances can be caused
Become larger.Meanwhile during multiple welding and cut-out is carried out to sensor fibre, the loss of sensor fibre interface can be caused to become
Greatly, making the result of detection, there are error.
The content of the invention
Solve the above problems in order to overcome the problems referred above or at least in part, the present invention provides a kind of sensor fibre and light
Fiber sensing equipment.
On the one hand, the present invention provides a kind of sensor fibre, it is characterised in that the sensor fibre is hollow antiresonance light
It is fine；
The hollow antiresonance optical fiber includes cladding regions, the hollow pipe and by the cladding regions being made of microcapillary
The core region surrounded；The hollow pipe is socketed in the outside of the cladding regions；The refractive index of the core region is less than institute
State the refractive index of cladding regions；
For multiple pre-selected locations groups on the hollow pipe side, on each pre-selected locations in each pre-selected locations group
It is provided with through hole, all pre-selected locations in each pre-selected locations group are arranged along the central axis direction of the sensor fibre.
Preferably, the multiple pre-selected locations group is located on straight line.
Preferably, all pre-selected locations in each pre-selected locations group are located at the first predeterminable area, first preset areas
Domain is any region not contacted on the hollow pipe side with the cladding regions.
Preferably, the through hole is used to make test substance enter the core region.
Preferably, all pre-selected locations in each predeterminated position group are located at the second predeterminable area, second preset areas
Domain is any region contacted on the hollow pipe side with the cladding regions.
Preferably, the through hole is used to make test substance enter inside the cladding regions region for being filled with gas.
Preferably, the test substance includes：Gas, liquid or field material, a kind of determinand of each sets of vias input
Matter.
Preferably, through hole is set on each pre-selected locations by way of laser boring in each pre-selected locations group.
On the other hand, the present invention provides a kind of fibre-optical sensing device, including：Light source, spectrometer, and above-mentioned sensing
Optical fiber.
Preferably, at the sensor fibre both ends, welding has single mode optical fiber respectively, and one end of two single mode optical fibers connects respectively
There are the light source and the spectrometer.
Sensor fibre and fibre-optical sensing device provided by the invention, pass through each pre- bit selecting in each pre-selected locations group
Put and be provided with through hole, test substance is entered by these through holes in sensor fibre, to the light transmitted in sensor fibre
It is modulated.When detecting a variety of test substances, the structure of hollow antiresonance optical fiber provided by the invention can make variety classes
The through hole that is set on pre-selected locations of test substance enter inside core region or cladding regions the region for being filled with gas, no
Congener test substance can enter the fibre of optical fiber by the through hole set on the pre-selected locations in different pre-selected locations groups
The region of gas is filled with inside core region or cladding regions.Reduce examine a variety of test substances when sensor fibre welding and
The number of cut-out, reduces the workload of detection.Welding and breaks due to sensor fibre are reduced, and are avoided because of sensor fibre
Interface loss become larger and cause testing result there are error, improve the accuracy of testing result.
Brief description of the drawings
Fig. 1 is a kind of schematic cross-section of sensor fibre provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of sensor fibre provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic cross-section of sensor fibre provided in an embodiment of the present invention；
Fig. 4 is a kind of structure diagram of fibre-optical sensing device provided in an embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
One embodiment of the invention provides a kind of sensor fibre, and the sensor fibre is hollow antiresonance optical fiber；The sky
Core antiresonance optical fiber includes cladding regions, hollow pipe and the core region surrounded by the cladding regions being made of microcapillary
Domain；The hollow pipe is socketed in the outside of the cladding regions；The refractive index of the core region is less than the cladding regions
Refractive index；For multiple pre-selected locations groups on the hollow pipe side, on each pre-selected locations in each pre-selected locations group
It is provided with through hole, all pre-selected locations in each pre-selected locations group are arranged along the central axis direction of the sensor fibre.
Specifically, the cladding regions in hollow antiresonance optical fiber include at least four microcapillarys, and at least four microtriches are thin
Pipe is arranged in annulus, and close to each other, but does not have node, i.e., contactless between microcapillary, and the tube wall of these microcapillarys is
Form cladding regions.Wherein, the pipe thickness of microcapillary identical can be differed also, can be designed as needed.By wrapping
The region that layer region surrounds is core region, and core region is filled with air, rare gas or vacuum state.It is filled with
The pipe wall material of microcapillary, that is, the material of cladding regions can be that silica, soft glass or other refractive index are more than
The material of the refractive index of core region.Since core region and cladding regions are spatially without actual boundary, so these
Microcapillary is filled with air, rare gas or place equivalent in the space where core region that is, around microcapillary
It is interior with also there is identical occupied state outside microcapillary in vacuum state, microcapillary.
Hollow pipe is provided outside in microcapillary, hollow pipe is socketed in the outside of each microcapillary, is used to support and fixes
Each microcapillary.For multiple pre-selected locations groups on hollow pipe side, on each pre-selected locations in each pre-selected locations group
It is provided with through hole, all pre-selected locations in each pre-selected locations group are arranged along the central axis direction of the sensor fibre.
Here multiple pre-selected locations groups refer at least one pre-selected locations group, at least one in each pre-selected locations group
Pre-selected locations, are provided with through hole on pre-selected locations.Wherein, the quantity of pre-selected locations group and the quantity of pre-selected locations can be according to need
Set, and each pre-selected locations in each pre-selected locations group and each pre-selected locations group be it is mutually independent,
The through hole then set on pre-selected locations is also mutually independent.Each pre-selected locations group corresponds to a sets of vias, each pre-selection
One through hole of position correspondence, the number of openings in each sets of vias can be identical, can also differ, the shape of through hole can be identical
Differ.When at least two pre-selected locations groups, i.e., at least provided with two sets of vias when, the adjacent sets of vias of each two it
Between spacing can be configured as needed, meanwhile, when having at least two through holes in each sets of vias, adjacent logical of each two
Spacing between hole can be also configured as needed, and the present invention does not limit this.
By the use of hollow antiresonance optical fiber as sensor fibre, spectrum width is transmitted, loss is low, can bear the power of higher.With tradition
Compared by the use of solid core optical fiber as sensor fibre, the response time of the fibre-optical sensing device based on hollow antiresonance optical fiber is short, anti-
Should be sensitive, and the concentration of mixed gas can be accurately measured, it can be applied to middle infrared band.Because the fibre core of traditional solid core fibres
Region is silicon materials, can there is stronger absorption to the light beam of more than 2um, and the light of middle infrared band is in hollow antiresonance optical fiber
Core region in propagate when will not be strongly absorbed；Compared with photon band gap hollow optic fibre, hollow antiresonance optical fiber light-guiding model
Enclose it is wider, to optical fiber side punching produce loss it is smaller, the power of higher can be born.It for many natural gases (methane,
Ethane etc.) a kind of accurately and efficiently detection method is provided, and space is carried out to test substance using multiple sets of vias and is distinguished
Know.
In the present embodiment, by being provided with through hole on each pre-selected locations in each pre-selected locations group, make determinand
Matter can be entered in sensor fibre by these through holes, and the light transmitted in sensor fibre is modulated.It is a variety of to be measured detecting
During material, the structure of hollow antiresonance optical fiber provided by the invention can be such that different types of test substance is set on pre-selected locations
The through hole put enters inside core region or cladding regions the region for being filled with gas, and different types of test substance can pass through
Different sets of vias enters inside the core region or cladding regions of optical fiber the region for being filled with gas.Reduce and examine a variety of treat
The number of welding and the cut-out of sensor fibre when surveying material, reduces the workload of detection.Due to the welding and cut-out of sensor fibre
Number is reduced, and avoid causes testing result to improve testing result there are error because becoming larger the interface loss of sensor fibre
Accuracy.
On the basis of above-described embodiment, the multiple pre-selected locations group is located on straight line, that is, multiple through holes
Group is on straight line, and in addition, different sets of vias can also be located on different straight lines.
On the basis of above-described embodiment, all pre-selected locations in each pre-selected locations group are located at the first predeterminable area,
First predeterminable area is any region not contacted on the hollow pipe side with the cladding regions.In hollow pipe side
On the first predeterminable area on be provided with multiple sets of vias, for making test substance enter the core region.
It is as shown in Figure 1 the sectional view of sensor fibre, the cladding regions in Fig. 1 include six microcapillarys 12, and six micro-
The intermediate region that capillary surrounds is core region 11.Core region 11 is filled with air, then is also around six microcapillarys
Air.Hollow pipe 13 is socketed with outside each microcapillary 12, is used to support and fixes each microcapillary.For on hollow pipe side
Any region 14 not contacted with cladding regions 12, is provided with multiple sets of vias, for making test substance enter core region.
Stereogram is as shown in Figure 2.In Fig. 2, two sets of vias are provided with the hollow pipe on the outside of sensor fibre, first logical
Kong Zuzhong has 12 through holes, and the spacing of the adjacent through hole of each two is 5cm, there is 7 through holes, each two phase in second sets of vias
The spacing of adjacent through hole is 8cm.
It is multiple by being provided with the hollow pipe side of hollow antiresonance optical fiber on the first predeterminable area in the present embodiment
Sets of vias, allows test substance to enter the core region of sensor fibre by these through holes, to the light transmitted in core region
It is modulated.
As shown in figure 3, on the basis of above-described embodiment, all pre-selected locations in each predeterminated position group are located at second
Predeterminable area, second predeterminable area are any region 15 contacted on the hollow pipe side with the cladding regions.
When the light beam transmitted in the core region of sensor fibre is leaked to cladding regions, and filling inside entrance cladding regions
There is the region of gas.Modulation of the test substance to light beam then can also be realized by this punch position.
On the basis of above-described embodiment, the test substance that can realize detection using sensor fibre provided by the invention can wrap
Include：Gas, liquid or field material.Sensor fibre is based on antiresonance principle leaded light, and cladding structure is simple, and there is relatively low transmission to damage
Consumption, wider conveyor, higher damage threshold.When test substance is gas, suitable light source may be selected, pass through gas pair
The absorption of light beam is detected gas.
On the basis of above-described embodiment, each pre-selection that can be by way of laser boring in each pre-selected locations group
Through hole is set on position.Preferably, punched using femtosecond laser.
As shown in figure 4, in another embodiment of the present invention, there is provided a kind of fibre-optical sensing device, including：Light source 31, light
Spectrometer 32, and the sensor fibre 33 provided in the various embodiments described above.
Light source 31 produces light beam, is transmitted through sensor fibre 33, enters at this time from the through hole on the hollow pipe of sensor fibre 33
Test substance in sensor fibre 33 carries out phase or intensity modulated, modulated light beam to the light beam of transmission in sensor fibre 33
Spectrometer 32 is transmitted to, the spectrum that received light beam is docked by spectrometer 32 is analyzed, and finally detects test substance
Species.
In the present embodiment, by the way that sensor fibre is applied in fibre-optical sensing device, become the process of detection test substance
Must be simple and easy to do, without the connection and disconnection that repeatedly carry out sensor fibre.
On the basis of above-described embodiment, at sensor fibre both ends, welding has a single mode optical fiber respectively, two single mode optical fibers
One end is connected to light source and spectrometer respectively.
Specifically, welding is carried out to sensor fibre and single mode optical fiber by the method for low loss welding, whole light can be reduced
Loss of the fiber sensing equipment during transmission light.
The low loss welding of sensor fibre and single mode optical fiber, is the key for realizing sensing device all-fiber, passes through TEC etc.
Technology causes two kinds of optical fiber low loss weldings, the structure of all-fiber is formed, so that fibre-optical sensing device is more practical.
Finally, method of the invention is only preferable embodiment, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on, should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of sensor fibre, it is characterised in that the sensor fibre is hollow antiresonance optical fiber；
Cladding regions that the hollow antiresonance optical fiber includes being made of microcapillary, hollow pipe and surrounded by the cladding regions
Core region；The hollow pipe is socketed in the outside of the cladding regions；The refractive index of the core region is less than the bag
The refractive index in layer region；
For multiple pre-selected locations groups on the hollow pipe side, set on each pre-selected locations in each pre-selected locations group
There is a through hole, all pre-selected locations in each pre-selected locations group are arranged along the central axis direction of the sensor fibre.
2. sensor fibre according to claim 1, it is characterised in that the multiple pre-selected locations group is located at straight line
On.
3. sensor fibre according to claim 2, it is characterised in that all pre-selected locations positions in each pre-selected locations group
In the first predeterminable area, first predeterminable area is any area not contacted on the hollow pipe side with the cladding regions
Domain.
4. sensor fibre according to claim 3, it is characterised in that the through hole is used to make test substance enter the fibre
Core region.
5. sensor fibre according to claim 2, it is characterised in that all pre-selected locations positions in each predeterminated position group
In the second predeterminable area, second predeterminable area is any area contacted on the hollow pipe side with the cladding regions
Domain.
6. sensor fibre according to claim 5, it is characterised in that the through hole is used to make test substance enter the bag
Layer region.
7. the sensor fibre according to claim 4 or 6, it is characterised in that the test substance includes：Gas, liquid or
Field material.
8. sensor fibre according to claim 1, it is characterised in that in each pre-selected locations by way of laser boring
Through hole is set on each pre-selected locations in group.
A kind of 9. fibre-optical sensing device, it is characterised in that including：Light source, spectrometer, and any one of claim 1 to 8 institute
The sensor fibre stated.
10. fibre-optical sensing device according to claim 9, it is characterised in that distinguish welding at the sensor fibre both ends
There is single mode optical fiber, one end of two single mode optical fibers is connected to the light source and the spectrometer respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954529.0A CN107941335A (en) | 2017-10-13 | 2017-10-13 | Sensor fibre and fibre-optical sensing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954529.0A CN107941335A (en) | 2017-10-13 | 2017-10-13 | Sensor fibre and fibre-optical sensing device |
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| CN201710954529.0A Pending CN107941335A (en) | 2017-10-13 | 2017-10-13 | Sensor fibre and fibre-optical sensing device |
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| CN109143460A (en) * | 2018-09-12 | 2019-01-04 | 华中科技大学 | A kind of negative cruvature hollow-core fiber and preparation method thereof |
| CN109270625A (en) * | 2018-10-25 | 2019-01-25 | 北京航空航天大学 | A kind of cucurbit optical fiber transmitting hollow beam |
| CN109283612A (en) * | 2018-11-13 | 2019-01-29 | 北京航空航天大学 | A kind of hollow antiresonance optical fiber and its design method based on nested support ring |
| CN110501777A (en) * | 2019-07-28 | 2019-11-26 | 复旦大学 | A kind of hollow antiresonance optical fiber polarisation filter |
| CN110568549A (en) * | 2019-09-06 | 2019-12-13 | 江苏斯德雷特通光光纤有限公司 | Multi-core optical fiber based on air hole rod and preparation method thereof |
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| CN109283612B (en) * | 2018-11-13 | 2019-04-26 | 北京航空航天大学 | A kind of hollow antiresonance optical fiber and its design method based on nested support ring |
| CN110501777A (en) * | 2019-07-28 | 2019-11-26 | 复旦大学 | A kind of hollow antiresonance optical fiber polarisation filter |
| CN110568549A (en) * | 2019-09-06 | 2019-12-13 | 江苏斯德雷特通光光纤有限公司 | Multi-core optical fiber based on air hole rod and preparation method thereof |
| CN112083524A (en) * | 2020-09-18 | 2020-12-15 | 中国船舶重工集团公司第七0七研究所 | Magnetic tunable polarizer based on hollow anti-resonance optical fiber |
| CN112083524B (en) * | 2020-09-18 | 2022-09-16 | 中国船舶重工集团公司第七0七研究所 | Magnetic tunable polarizer based on hollow anti-resonance optical fiber |
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