All-fiber filter based on thin-core fibers

A thin-core fiber, all-fiber technology, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of no practical value, poor mechanical strength, and high cost

Inactive Publication Date: 2009-12-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some design schemes often have complicated processes in the production process, such as connecting a small section of multimode fiber, or using heating to expand the fiber core at the end face of the fiber, which increases the difficulty of making the device; some require sp...

Method used

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  • All-fiber filter based on thin-core fibers
  • All-fiber filter based on thin-core fibers
  • All-fiber filter based on thin-core fibers

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Embodiment Construction

[0012] Such as figure 1 As shown, the thin-core optical fiber filter includes a packaging box 3, and the single-mode optical fiber component is arranged through the packaging box 3, and the two ends of the single-mode fiber component are connected to the flange 1 respectively. The single-mode optical fiber assembly includes three sections of single-mode optical fiber in series, wherein the single-mode optical fiber at both ends adopts a standard single-mode optical fiber 2 (Corning SMF28, core diameter 6.06 μm), and the single-mode optical fiber in the middle section adopts a thin-core single-mode optical fiber 4 (Nufern 460-HP, core diameter 3.30 μm, cut-off wavelength 450nm), three sections of single-mode fiber are coaxially arranged, and the two ends of the thin-core single-mode fiber 4 are respectively fused with one end of two sections of standard single-mode fiber 2 . The filter is respectively connected to the broadband light source and the spectrometer through the flan...

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Abstract

The invention relates to an all-fiber filter based on thin-core fibers. The conventional fiber grating filter has poor temperature stability, and is not suitable for the operation under extreme working conditions. The all-fiber filter comprises a packing box, a single-mode fiber component is arranged by passing through the packing box, and two ends of the single-mode fiber component are connected with a ring flange respectively. The single-mode fiber component comprises three sections of single-mode fibers which are connected in series, wherein the single-mode fibers at two ends adopt standard single-mode fibers, the middle section of the single-mode fibers adopts thin-core single-mode fibers, the three sections of the single-mode fibers are coaxially arranged, and two ends of the thin-core single-mode fibers are fused with one end of the two sections of the standard single-mode fibers respectively. The filter is simple to manufacture, and has good temperature stability and response characteristic to the external refractive index change.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, and relates to an all-fiber filter based on a thin-core optical fiber. Background technique [0002] Due to the advantages of small size, light weight, simple structure, and anti-electromagnetic interference, optical fiber devices have been widely used in communication, sensing and other fields. Especially for the all-fiber filter, its performance is directly related to the transmission quality of the current optical fiber communication network. Among them, fiber grating is the most mature fiber-optic filter in the application today. It is divided into two types: one is called fiber Bragg grating (Fiber BraggGrating, FBG), which is a narrow-band reflective band-pass filter The other is called long period fiber grating (Long Period Fiber Grating, LPG), which is a transmission type band-stop filter. Although the structure of these two filters is relatively simple and the rejection ratio is...

Claims

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Application Information

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IPC IPC(8): G02B6/02
Inventor 张阿平夏天豪朱晶晶何赛灵
Owner ZHEJIANG UNIV
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