CN112505824B - Approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber with two-layer air hole structure - Google Patents
Approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber with two-layer air hole structure Download PDFInfo
- Publication number
- CN112505824B CN112505824B CN202011446562.0A CN202011446562A CN112505824B CN 112505824 B CN112505824 B CN 112505824B CN 202011446562 A CN202011446562 A CN 202011446562A CN 112505824 B CN112505824 B CN 112505824B
- Authority
- CN
- China
- Prior art keywords
- round holes
- fiber
- polarization
- optical fiber
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
- G02B6/02366—Single ring of structures, e.g. "air clad"
-
- 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
- G02B6/024—Optical fibres with cladding with or without a coating with polarisation maintaining properties
-
- 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
- G02B6/032—Optical fibres with cladding with or without a coating with non solid core or cladding
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses a double-layer air hole structure approximate single-polarization thin-diameter solid-core polarization-maintaining photonic crystal fiber, which realizes the requirement of thin diameter of the optical fiber by reducing the number of air hole layers in a cladding into two layers, thereby reducing the weight and the size of an optical fiber ring, being beneficial to the miniaturization development of an optical fiber gyroscope, reducing the manufacturing difficulty of the photonic crystal fiber while ensuring the mechanical strength of the thin-diameter optical fiber and improving the production efficiency; by adjusting the arrangement and the size of the air holes, the low-loss transmission of the fast axis of the fundamental mode and the inhibition of the slow axis and the high-order mode are realized, so that the slow axis loss is more than 5 times larger than the fast axis loss, the transmission of linearly polarized light in the optical fiber is favorably kept, the influence of a magnetic field on the phase of the transmitted light in the optical fiber ring is reduced, the requirements of low loss, single mode application, approximate single polarization and high birefringence of the small-diameter solid-core photonic crystal optical fiber are realized, and new possibilities are provided for the popularization and the application of the solid-core photonic crystal and the application in an ultra-stable, light and small optical fiber gyroscope.
Description
Technical Field
The invention relates to the technical field of microstructure optical fibers, in particular to a thin-diameter solid-core polarization-maintaining photonic crystal fiber with a two-layer air hole structure similar to single polarization.
Background
The fiber optic gyroscope, as an all-solid inertial angular velocity sensor, has been developed for decades, and has the unique technical and performance advantages of all-solid structure, high reliability, long service life, high starting speed, short response time, large measurement range, wide dynamic range, impact and vibration resistance, chemical corrosion resistance, small volume, light weight, low cost, suitability for mass production and the like, so that the fiber optic gyroscope becomes an important navigation control sensor in the civil and military fields. The fiber optic gyroscope utilizes the Sagnac effect, namely the phase difference between two main wave trains which are transmitted Clockwise (CW) and anticlockwise (CCW) in the same optical path is related to the rotation speed of the optical path, and phase shift caused by rotation of a carrier is solved through related detection to obtain the angular speed of the carrier.
With the continuous expansion of the application field of the fiber-optic gyroscope, the contradiction between the volume, the weight and the precision is increasingly prominent, and the precision of the fiber-optic gyroscope is difficult to further improve on the premise of maintaining a certain size and volume by the prior art. In addition, the traditional optical fiber is sensitive to irradiation and magnetic fields, needs to be provided with magnetic shielding and irradiation protection, and directly increases the volume and weight of the optical fiber gyroscope.
The solid core photonic crystal fiber is made of high-purity quartz glass, a certain number of air holes are formed in the cladding, so that the refractive index of the cladding is lower than that of the fiber core, and light can be limited in the fiber core to be transmitted by adopting the total internal reflection principle, so that the solid core photonic crystal fiber can also be called as total internal reflection type photonic crystal fiber (TIR-PCF). Different from the traditional step type optical fiber, a certain number of air holes exist in the cladding of the TIR-PCF, different cladding refractive indexes and fiber core refractive indexes can be obtained by adjusting the number, size, spacing and other structural parameters of the air holes, and the difference between the two refractive indexes can be freely adjusted in a large range, so that the flexibility of the optical fiber structure design is greatly improved. By changing the shape, size and arrangement mode of the air holes of the cladding, the optical fiber which meets the application requirements and is matched with other devices can be designed.
The optical fiber is made of a single material, does not need doping and stress regions, has good environmental adaptability and can be suitable for optical fiber sensing and communication in severe environments. Compared with the traditional panda polarization maintaining fiber, the polarization maintaining photonic crystal fiber has the following advantages: 1) the optical fiber is generally made of a single high-purity quartz glass material, the geometric birefringence is formed through structural asymmetry, the mechanical properties of a fiber core and a cladding are completely matched, the sensitivity to temperature is 100-1000 times lower than that of the traditional optical fiber, the temperature performance of the gyroscope is improved, and the radiation resistance of the photonic crystal optical fiber is greatly improved due to the undoped fiber core; 2) the traditional optical fiber is easy to leak when the bending radius is smaller, so that the miniaturization development of the optical fiber gyroscope is limited, the bending loss of the polarization-maintaining photonic crystal optical fiber is low, and the miniaturization of the gyroscope is easy to realize; 3) the polarization maintaining photonic crystal fiber has no stress region, the relationship between the polarization maintaining performance and the size of the fiber is relatively weak, and the thin-diameter high-birefringence fiber can be developed. In conclusion, the adoption of the polarization-maintaining photonic crystal fiber is very important for improving the performance of the fiber optic gyroscope.
The sensitivity of the fiber optic gyroscope can be expressed by the following formula:
from equation (1), to improve the gyro sensitivity, the length L of the fiber loop can be extended, the diameter D of the fiber can be increased, and the wavelength λ of the light source used can be reduced. In order to ensure low-loss transmission of light waves, a light source with a transmission wavelength of 850nm may be selected. For light and small optical fiber gyroscopes, especially for medium and low precision (precision >0.1 degree/h), it is most effective to extend the length of the optical fiber. Since the volume of the fiber optic gyroscope is determined by a user, in order to extend the length of the fiber optic ring under a limited volume condition to achieve the purpose of improving the precision of the fiber optic gyroscope, the diameter of the optical fiber needs to be reduced. How to reduce the diameter of the optical fiber without affecting the performance of the optical fiber in all aspects is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a single-polarization thin-diameter solid-core polarization-maintaining photonic crystal fiber with a two-layer air hole structure, which is used to reduce the diameter of the optical fiber, thereby achieving the purpose of extending the length of the optical fiber ring under the condition of limited volume to improve the precision of the optical fiber gyroscope.
The two-layer air hole structure provided by the invention is similar to a single-polarization small-diameter solid-core polarization-maintaining photonic crystal fiber, the cross section of the fiber is circular, a coating layer, a cladding and a fiber core are sequentially arranged from outside to inside, and air holes are distributed in the cladding;
the air holes are divided into two layers around the fiber core, the first layer of air holes close to the fiber core comprises two first round holes with the diameter D and four second round holes with the diameter D, and the second layer of air holes positioned on the periphery of the first layer of air holes comprises four third round holes with the diameter D and eight fourth round holes with the diameter D;
in the first layer of air holes, two first round holes and four second round holes are arranged to form a first regular hexagon with the side length of Λ, the center of the first regular hexagon is the circle center of the optical fiber section, the circle centers of the two first round holes are respectively located at two vertex points with the farthest distance in the first regular hexagon, the circle centers of the four second round holes are respectively located at the remaining four vertex points of the first regular hexagon, the distance between every two adjacent first round holes and every two adjacent second round holes is Λ;
in the second layer of air holes, four third round holes and eight fourth round holes are arranged into a second regular hexagon with the side length of 2 lambada, the centers of the first regular hexagon and the second regular hexagon are overlapped and have mutually parallel sides, the centers of the two fourth round holes are respectively located at two vertex points of the second regular hexagon, the centers of the two vertex points and the centers of the two first round holes are on the same straight line, the centers of the remaining six fourth round holes are respectively located at the middle positions of six sides of the second regular hexagon, the centers of the four third round holes are respectively located at the remaining four vertex points of the second regular hexagon, the distance between the adjacent third round holes and the adjacent fourth round holes is lambada, and the distance between the adjacent two fourth round holes is lambada.
In a possible implementation mode, in the two-layer air hole structure approximate single-polarization small-diameter solid-core polarization-maintaining photonic crystal fiber provided by the invention, the Λ is 3.5 μm.
In a possible implementation mode, in the two-layer air hole structure approximate single-polarization small-diameter solid-core polarization-maintaining photonic crystal fiber provided by the invention, the range of d/Λ is 0.54-0.6.
In a possible implementation mode, in the two-layer air hole structure approximate single-polarization small-diameter solid-core polarization-maintaining photonic crystal fiber provided by the invention, the range of D/Λ is 1.13-1.2.
According to the solid-core polarization-maintaining photonic crystal fiber provided by the invention, the number of air hole layers in the cladding is reduced to two layers, so that the requirement of the thin diameter of the fiber is realized, the weight and the size of the fiber ring can be reduced, the miniaturization development of a fiber-optic gyroscope is facilitated, the temperature gradient of the fiber ring can be reduced, the temperature stability of the fiber ring is facilitated to be improved, the mechanical strength of the thin-diameter fiber is ensured, the manufacturing difficulty of the photonic crystal fiber is reduced, the production efficiency is improved, the production cost is reduced, and the solid-core polarization-maintaining photonic crystal fiber is suitable for engineering production; by adjusting the arrangement and the size of the air holes, the low-loss transmission of the fast axis of the fundamental mode and the inhibition of the slow axis and the high-order mode are realized, so that the slow axis loss is more than 5 times larger than the fast axis loss, the transmission of linearly polarized light in the optical fiber is favorably kept, the influence of a magnetic field on the phase of the transmitted light in the optical fiber ring is reduced, the requirements of low loss, single mode application, approximate single polarization and high birefringence of the small-diameter solid-core photonic crystal optical fiber are realized, and new possibilities are provided for the popularization and the application of the solid-core photonic crystal and the application in an ultra-stable, light and small optical fiber gyroscope.
Drawings
FIG. 1 is a schematic cross-sectional view of a thin-diameter solid-core polarization-maintaining photonic crystal fiber with a two-layer air hole structure according to the present invention;
FIG. 2 is a curve of the birefringence characteristic of a two-layer air hole structure approximate single-polarization thin-diameter solid-core polarization-preserving photonic crystal fiber varying with parameters D/Λ and D/Λ provided by the present invention;
FIG. 3 is a curve of the fast axis loss and the fast axis loss ratio of the two-layer air hole structure approximate single-polarization thin-diameter solid core polarization-maintaining photonic crystal fiber provided by the invention varying with the parameters D/Λ and D/Λ;
FIG. 4 is a schematic diagram of mode field distribution in an optimized parameter range for a two-layer air-hole structure approximate single-polarization thin-diameter solid-core polarization-maintaining photonic crystal fiber provided by the present invention;
FIG. 5 is a schematic diagram of the fast axis and slow axis mode field diameters within the optimized parameter range of a two-layer air hole structure approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber provided by the invention.
Description of reference numerals: the fiber core comprises a coating layer 1, a cladding layer 2, a fiber core 3, a first round hole 4, a second round hole 5, a third round hole 6 and a fourth round hole 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only illustrative and are not intended to limit the present invention.
The two-layer air hole structure approximate single-polarization small-diameter solid core polarization-maintaining photonic crystal fiber provided by the invention is characterized in that as shown in figure 1, the cross section of the fiber is circular, and the fiber is sequentially provided with a coating layer 1, a cladding layer 2 and a fiber core 3 from outside to inside, namely, the coating layer 1 is positioned at the periphery of the cladding layer 2, the cladding layer 2 is positioned at the periphery of the fiber core 3, the material of the cladding layer 2 is generally quartz, and air holes are distributed in the cladding layer 2;
the air holes are divided into two layers around the fiber core 3, the first layer of air holes close to the fiber core 3 comprises two first round holes 4 with the diameter D and four second round holes 5 with the diameter D, and the second layer of air holes positioned on the periphery of the first layer of air holes comprises four third round holes 6 with the diameter D and eight fourth round holes 7 with the diameter D;
in the first layer of air holes, two first round holes 4 and four second round holes 5 are arranged into a first regular hexagon with the side length of Λ, the center of the first regular hexagon is the circle center (namely a fiber core 3) of the optical fiber section, the circle centers of the two first round holes 4 are respectively located at two vertex points with the farthest distance in the first regular hexagon, the circle centers of the four second round holes 5 are respectively located at the remaining four vertex points of the first regular hexagon, the distance between the adjacent first round holes 4 and the adjacent second round holes 5 is Λ, and the distance between the adjacent two second round holes 5 is Λ;
in the second layer of air holes, four third round holes 6 and eight fourth round holes 7 are arranged into a second regular hexagon with the side length of 2 Λ, the centers of the first regular hexagon and the second regular hexagon are overlapped (the centers of circles of the optical fiber sections are the fiber cores 3) and have mutually parallel sides (namely the two hexagons are in positive correspondence), the centers of the two fourth round holes 7 are respectively located at two vertexes of the second regular hexagon, the two vertexes and the centers of the two first round holes 4 are on the same straight line, the centers of the remaining six fourth round holes 7 are respectively located at the middle positions of six sides of the second regular hexagon, the centers of the four third round holes 6 are respectively located at the remaining four vertexes of the second regular hexagon, the distance between the adjacent third round holes 6 and the adjacent fourth round holes 7 is Λ, and the distance between the adjacent two fourth round holes 7 is Λ.
In order to extend the length of the optical fiber ring under the condition of limited volume to achieve the purpose of improving the precision of the optical fiber gyroscope, the diameter of the optical fiber needs to be reduced. The reduction of the diameter of the optical fiber can be realized by reducing the thicknesses of the coating layer and the cladding layer, and also can be realized by reducing the number of the air holes. In order to avoid this problem, it is necessary to consider the influence of parameters such as the arrangement, size, duty ratio, and the like of the air holes on loss, polarization, and mode to obtain optimized parameters so as to simultaneously ensure the mechanical strength requirement, precision requirement, requirement for the limitation capability of light, requirement for single-mode transmission, and the like of the optical fiber.
The solid-core polarization-maintaining photonic crystal fiber provided by the embodiment of the invention is designed for light with a transmission waveband of 850nm, and the average mode field diameter of an integrated optical chip adopted by the fiber-optic gyroscope is about 3.5 μm, so that in order to ensure that the mode field diameter of the fiber is matched with the mode field diameter of the integrated optical chip, the air hole period Λ of the fiber can be designed to be 3.5 μm so as to ensure that the mode field is moderate in size.
The variation of the birefringence of the optical fiber is simulated and calculated by changing the parameter D/Λ and the parameter D/Λ, as shown in fig. 2, the birefringence of the optical fiber is improved with the increase of the diameter of the air hole, i.e. with the increase of the parameter D/Λ and the parameter D/Λ, wherein the influence of the parameter D/Λ on the birefringence is relatively significant. In order to achieve the polarization maintaining effect of the conventional polarization maintaining optical fiber, it is necessary to satisfy the requirement that the birefringence of the optical fiber is more than 3.5 × 10-4Condition (d) therefore, d/Λ is required>0.48。
Further, by changing the parameter D/Λ and the parameter D/Λ, the fiber loss change is simulated, and the transmission light of the fast axis and the transmission light of the slow axis are comparedThe loss difference, as shown in fig. 3, the loss of the fast axis transmission light decreases rapidly with the increase of the air hole diameter (i.e., the increase of the parameter D/Λ and the parameter D/Λ), and the influence of the parameter D/Λ on the fiber loss is relatively significant. In order to maintain the transmission of linearly polarized light in the optical fiber and reduce the influence of a magnetic field on the phase of the transmitted light in the optical fiber ring, the requirement that the fast axis loss of the optical fiber is 10 is met-2dB/km～10-3Between dB/km, the condition that the slow axis loss is more than five times greater than the fast axis loss, therefore, 0.54 is required<d/Λ<0.6，1.13<D/Λ≤1.2。
The simulation results are verified as follows. With reference to the mode field diameter factor, D/Λ ≈ 0.54 and D/Λ ≈ 1.2 are selected for mode field analysis, the mode field distribution is shown in fig. 4, the mode field is elliptical, and the light energy is well limited in the fiber core. On the basis of the mode field simulation, the mode field diameter of the optical fiber is calculated, the mode field diameter of the elliptical mode field is shown in figure 5, the mode field diameter in the fast axis direction is about 2.5 mu m, the mode field diameter in the slow axis direction is 5 mu m, and the average mode field diameter is 3.75 mu m, so that the mode field is matched with the 850nm waveguide mode field, and the direct coupling loss is favorably reduced.
The manufacturing process of the solid-core polarization-maintaining photonic crystal fiber provided by the invention is the same as the manufacturing process of the common solid-core photonic crystal fiber, and the optical fiber is manufactured by adopting a stacking-drawing method. Firstly, selecting a quartz capillary tube with a proper size to carry out a capillary tube stacking process, stacking the quartz capillary tube into a capillary tube cluster with a similar optical fiber structure, inserting the stacked capillary tube cluster into the capillary tube with the proper size, and finishing the manufacture of a solid-core photonic crystal optical fiber preform; then, a solid core polarization-maintaining photonic crystal fiber is drawn by air pressure control, the diameter of a bare fiber is 60 μm, the diameter of the fiber is 100 μm, and the thickness of a coating layer is 20 μm.
The characteristics of the solid-core polarization-maintaining photonic crystal fiber provided by the invention are analyzed. Through simulation analysis, the parameter D/Lambda is adjusted to reduce the fast axis limiting loss of the fundamental mode to be less than 10-2dB/km, and slow axis losses greater than 5 x 10- 2dB/km, high order mode confinement loss greater than 10dB/km while ensuring birefringence of the fiber greater than 3.5 x 10-4(ii) a In practical applicationWhen the fiber optic gyroscope is used, the length of the optical fiber reaches over one hundred meters, so that the high-order mode does not bring large errors to the fiber optic gyroscope. The birefringence of the solid-core polarization-maintaining photonic crystal fiber provided by the invention is similar to that of the traditional panda polarization-maintaining fiber, and the requirement of high birefringence is met. After the fiber is finally developed into fiber, the loss of the optical fiber is increased, and the loss of the slow axis is larger, so that the energy interaction between the fast axis and the slow axis caused by end face coupling and optical fiber internal coupling can be greatly reduced, and further the magnetic sensitivity can be reduced.
According to the solid-core polarization-maintaining photonic crystal fiber provided by the invention, the number of air hole layers in the cladding is reduced to two layers, so that the requirement of the thin diameter of the fiber is realized, the weight and the size of the fiber ring can be reduced, the miniaturization development of a fiber-optic gyroscope is facilitated, the temperature gradient of the fiber ring can be reduced, the temperature stability of the fiber ring is facilitated to be improved, the mechanical strength of the thin-diameter fiber is ensured, the manufacturing difficulty of the photonic crystal fiber is reduced, the production efficiency is improved, the production cost is reduced, and the solid-core polarization-maintaining photonic crystal fiber is suitable for engineering production; by adjusting the arrangement and the size of the air holes, the low-loss transmission of the fast axis of the fundamental mode and the inhibition of the slow axis and the high-order mode are realized, so that the slow axis loss is more than 5 times larger than the fast axis loss, the transmission of linearly polarized light in the optical fiber is favorably kept, the influence of a magnetic field on the phase of the transmitted light in the optical fiber ring is reduced, the requirements of low loss, single mode application, approximate single polarization and high birefringence of the small-diameter solid-core photonic crystal optical fiber are realized, and new possibilities are provided for the popularization and the application of the solid-core photonic crystal and the application in an ultra-stable, light and small optical fiber gyroscope.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A two-layer air hole structure is similar to a single-polarization thin-diameter solid core polarization-maintaining photonic crystal fiber, the cross section of the fiber is circular, a coating layer, a cladding and a fiber core are sequentially arranged from outside to inside, and air holes are distributed in the cladding; the air holes are divided into two layers around the fiber core, the first layer of air holes close to the fiber core comprises two first round holes with the diameter D and four second round holes with the diameter D, the two first round holes and the four second round holes are arranged into a first regular hexagon with the side length of Λ in the first layer of air holes, the center of the first regular hexagon is the circle center of the section of the optical fiber, the circle centers of the two first round holes are respectively located at two vertexes of the first regular hexagon, which are farthest away from each other, the circle centers of the four second round holes are respectively located at the remaining four vertexes of the first regular hexagon, the distance between each two adjacent first round holes and each second round hole is Λ, and the distance between each two adjacent second round holes is Λ; the method is characterized in that: the second layer of air holes positioned on the periphery of the first layer of air holes comprise four third round holes with the diameter D and eight fourth round holes with the diameter D;
in the second layer of air holes, four third round holes and eight fourth round holes are arranged into a second regular hexagon with the side length of 2 lambada, the centers of the first regular hexagon and the second regular hexagon are overlapped and have mutually parallel sides, the centers of the two fourth round holes are respectively located at two vertex points of the second regular hexagon, the centers of the two vertex points and the centers of the two first round holes are on the same straight line, the centers of the remaining six fourth round holes are respectively located at the middle positions of six sides of the second regular hexagon, the centers of the four third round holes are respectively located at the remaining four vertex points of the second regular hexagon, the distance between the adjacent third round holes and the adjacent fourth round holes is lambada, and the distance between the adjacent two fourth round holes is lambada.
2. The two-layer air hole structure approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber of claim 1, wherein Λ is 3.5 μm.
3. The approximate single-polarization small-diameter solid-core polarization-maintaining photonic crystal fiber with the two-layer air hole structure as claimed in claim 2, wherein d/A ranges from 0.54 to 0.6.
4. The approximate single-polarization small-diameter solid-core polarization-maintaining photonic crystal fiber with the two-layer air hole structure as claimed in claim 2, wherein the range of D/Λ is 1.13-1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446562.0A CN112505824B (en) | 2020-12-09 | 2020-12-09 | Approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber with two-layer air hole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011446562.0A CN112505824B (en) | 2020-12-09 | 2020-12-09 | Approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber with two-layer air hole structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112505824A CN112505824A (en) | 2021-03-16 |
| CN112505824B true CN112505824B (en) | 2022-01-07 |
Family
ID=74971343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011446562.0A Active CN112505824B (en) | 2020-12-09 | 2020-12-09 | Approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber with two-layer air hole structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112505824B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113296186B (en) * | 2021-06-17 | 2022-02-18 | 燕山大学 | Polarization maintaining hollow anti-resonance optical fiber |
| CN113376735B (en) * | 2021-06-29 | 2022-07-01 | 西安邮电大学 | Chinese knot-like porous fiber core ultrahigh birefringence terahertz optical fiber |
| CN114284850B (en) * | 2022-02-18 | 2022-06-21 | 中国工程物理研究院激光聚变研究中心 | Polarization maintaining optical fiber amplifier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360433A (en) * | 2013-06-28 | 2015-02-18 | 哈尔滨工程大学 | Small-diameter polarization-maintaining photonic-crystal fiber |
| CN108873157A (en) * | 2018-06-15 | 2018-11-23 | 烽火通信科技股份有限公司 | A kind of low magnetic susceptibility polarization-maintaining photonic crystal fiber |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6993228B2 (en) * | 2003-08-13 | 2006-01-31 | Corning Incorporated | Dispersion compensated optical fiber transmission system and module including micro-structured optical fiber |
| JP2009198617A (en) * | 2008-02-20 | 2009-09-03 | Photonic Science Technology Inc | Photonic crystal fiber |
| CN102866455B (en) * | 2012-10-16 | 2014-05-28 | 江苏大学 | Large mode field optical fiber transmission system |
| CN104765100B (en) * | 2015-03-10 | 2016-12-14 | 北京航空航天大学 | A kind of thin footpath reality core polarization-maintaining photonic crystal fiber of four-layer structure |
| CN107315221B (en) * | 2017-07-26 | 2018-10-30 | 北京航空航天大学 | A kind of thin footpath solid core polarization-maintaining photonic crystal fiber of double-layer structure |
-
2020
- 2020-12-09 CN CN202011446562.0A patent/CN112505824B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360433A (en) * | 2013-06-28 | 2015-02-18 | 哈尔滨工程大学 | Small-diameter polarization-maintaining photonic-crystal fiber |
| CN108873157A (en) * | 2018-06-15 | 2018-11-23 | 烽火通信科技股份有限公司 | A kind of low magnetic susceptibility polarization-maintaining photonic crystal fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112505824A (en) | 2021-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112505824B (en) | Approximate single polarization thin-diameter solid core polarization-maintaining photonic crystal fiber with two-layer air hole structure | |
| CN107315221B (en) | A kind of thin footpath solid core polarization-maintaining photonic crystal fiber of double-layer structure | |
| US11598915B2 (en) | Anti-torsion solid-core polarization-maintaining photonic crystal fiber based on anisotropy of stress distribution | |
| CN111854726B (en) | Hollow anti-resonance optical fiber gyroscope | |
| CN115031714B (en) | Optical fiber gyroscope with magnetic field drift error active compensation function and compensation method | |
| CN101294808A (en) | Optical fiber gyroscope based on double-core photon crystal optical fiber | |
| CN105444750A (en) | Polarization-maintaining photonic crystal fiber gyroscope and manufacturing method thereof | |
| CN104359472A (en) | Multi-loop type photonic band gap optical fiber gyroscope based on reflection | |
| CN102103228A (en) | Double waveguide parallel polarization maintaining fiber and manufacturing method thereof | |
| CN109633812B (en) | Panda type polymer polarization maintaining optical fiber and application thereof | |
| CN104765100B (en) | A kind of thin footpath reality core polarization-maintaining photonic crystal fiber of four-layer structure | |
| CN108873157B (en) | Low-magnetic-sensitivity polarization-maintaining photonic crystal fiber | |
| CN116429080B (en) | Gyroscope based on high-stability hollow microstructure optical fiber ring | |
| CN113721318A (en) | Hollow polarization-maintaining photonic crystal fiber of fiber-optic gyroscope and preparation method | |
| CN103344231B (en) | A kind of polarization-maintaiphotonic photonic crystal optical-fiber gyroscope device | |
| CN113900172B (en) | High-birefringence hollow anti-resonance optical fiber based on resonance coupling effect enhancement | |
| CN115585801B (en) | Distributed high-precision optical fiber gyroscope with segmented optical path reciprocity and method | |
| CN111366081A (en) | Double-parameter sensor based on spiral photonic crystal fiber selective filling | |
| CN104360433B (en) | A kind of thin footpath polarization-maintaining photonic crystal fiber | |
| CN110927861B (en) | 9-core structured small-diameter polarization-maintaining photonic band gap fiber and preparation method thereof | |
| CN104880765B (en) | A kind of twin-core polarization-maintaining photonic crystal fiber | |
| CN116047655B (en) | Manufacturing method of optical fiber ring with high temperature performance and optical fiber gyroscope | |
| CN113031150A (en) | Hollow polarization maintaining optical fiber with core region having arc-shaped symmetrical thin-wall asymmetric structure | |
| CN112327405A (en) | Panda type single polarization optical fiber and preparation method thereof | |
| CN214335290U (en) | Panda type single polarization optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |