Unlock instant, AI-driven research and patent intelligence for your innovation.

Double refraction beat-length holey optical fiber insensitive to wave length

A technology of holey optical fiber and birefringence, applied in the direction of multi-layer core/clad optical fiber, clad optical fiber, etc., can solve the problems that block optical wave plates cannot be directly connected, and the temperature stability of optical fiber is poor, so as to improve temperature stability and working bandwidth, convenient docking, and solve the effect that the optical fiber cannot be directly connected

Inactive Publication Date: 2010-05-05
SHANGHAI UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of holey fiber whose birefringence beat length is insensitive to wavelength, which is especially suitable for making broadband optical fiber wave plate, and can well overcome the blockage Shaped optical waveplates cannot be directly connected to optical fibers and have poor temperature stability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double refraction beat-length holey optical fiber insensitive to wave length
  • Double refraction beat-length holey optical fiber insensitive to wave length
  • Double refraction beat-length holey optical fiber insensitive to wave length

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment one: see figure 1 , the holey optical fiber whose birefringence beat length is insensitive to wavelength, including a core 1 and a cladding, the cladding is divided into two regions, the inner cladding 2 and the outer cladding 3, and the inner cladding 2 has circular and elliptical shapes Microholes of two shapes are symmetrically arranged and distributed in a hexagonal shape, the two microholes adjacent to the fiber core 1 are circular microholes 4 , and the remaining microholes are elliptical microholes 5 .

Embodiment 2

[0020] Embodiment 2: This embodiment is the same as Embodiment 1, and the special features are as follows: This birefringent beat length is not sensitive to the wavelength of the holey fiber, and the end face structure is as follows: figure 1 shown. Its basic parameters are: the distance between the centers of adjacent micro-pores Λ = 4.4 μm, the major axis of the ellipse d x = 2.2μm, while the minor axis d y and the hole diameter d 2 It is a variable that can be optimized and adjusted. figure 2 Shown is d y = 1.1 μm, d 2 =3μm birefringence curve of holey fiber with wavelength. image 3 is d 2 = 3.0μm under the same condition d y = Birefringence curves at 1.1, 1.0, 0.9 μm. Figure 4 is d y =0.9μm under the same condition d 2 =2.8, 3.0, 3.2μm birefringence change curve. From image 3 It can be seen that under the condition that the diameter of the circular hole remains constant, as the minor axis of the elliptical hole decreases, the value of the birefringence in t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a double refraction beat-length holey optical fiber insensitive to wave length, comprising a fiber core and a cladding, and the cladding is divided into an inner cladding area and an outer cladding area, round and oval micropores are arranged in the inner cladding area and are symmetrically distributed in a hexagon shape, two round micropores are arranged close to the fiber core, and other micropores are oval. Meanwhile, by adjusting the short axis dy of the oval micropore and the diameter d2 of the round micropore, stable and consistent beat length not only can be obtained in a specific wave length window (like 1310nm), but also stable beat length with suitable numerical value can be designed according to practical needs for manufacturing optical fiber wave length. The double refraction holey optical fiber which is provided with suitable beat length and is insensitive to wave length is suitable for manufacturing wideband optical fiber wave plates which are integrative and has stable performance, overcomes the disadvantage that the blocky optical wave plate is not directly connected with the optical fiber, reduces the sensitivity to temperature and wave length and increases working bandwidth.

Description

technical field [0001] The invention relates to a holey optical fiber, which belongs to the field of optical fiber communication and optical signal processing, in particular to the field of the double refraction characteristic of the holey optical fiber and the design of broadband optical fiber wave plate. Background technique [0002] A holey fiber is generally composed of a pure silica core and a cladding with several microholes. The microholes make the effective refractive index of the cladding lower than that of the core, so that the optical signal is bound in the core for transmission. Porous fibers with different cross-sectional structures can have characteristics that conventional fibers do not have, such as broadband single-mode transmission, large mode field area, high nonlinearity, and tunable dispersion. They are widely used in fiber optic sensing, fiber lasers, and dispersion compensation. prospect. The arrangement and distribution of microholes in the cross sec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036
Inventor 林建强石志东李铭佳葛泉王立波
Owner SHANGHAI UNIV