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Mechanical chirp long-period fiber bragg grating

A fiber grating and long-period technology, which is applied in cladding optical fiber, optical waveguide, light guide, etc., can solve the problems of poor repeatability, difficult production, complicated equipment, etc., and achieve short production time, flexible and convenient production process, and controllable strong effect

Pending Publication Date: 2019-04-26
ZHEJIANG UNIV OF TECH
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  • Summary
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing chirped long-period fiber gratings, which are complex, difficult to manufacture, and poor in repeatability, the present invention proposes a mechanically chirped long-period fiber grating that is simple, convenient to manufacture, and has good repeatability.

Method used

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  • Mechanical chirp long-period fiber bragg grating
  • Mechanical chirp long-period fiber bragg grating
  • Mechanical chirp long-period fiber bragg grating

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] refer to figure 1 and figure 2 , a mechanical chirped long-period fiber grating, including a force applying device, an upper pressing plate 2 and a lower fixed base 1, the applying force device is any device that can provide mechanical pressure 5, and the upper pressing plate 2 has a set A V-shaped groove with a fixed period number N and a fixed period size of Λ, the lower fixed base 1 includes U-shaped grooves with different curvature radii and lengths, and the optical fiber is fixed in the U-shaped groove so that the optical fiber maintains a certain curvature radius R curved.

[0023] In this embodiment, 1 is the lower fixing base (U-shaped groove), which is used to fix the bending of the optical fiber and ensure the stability during the manufacturing process. 2 is the upper pressing plate (V-groove), which is a periodically changing saw-toothed plate for...

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Abstract

The invention discloses a mechanical chirp long-period fiber bragg grating. The mechanical chirp long-period fiber bragg grating comprises a force applying device, an upper metal pressing plate and alower metal fixing base, the force applying device is any one device capable of providing mechanical pressure, the upper metal pressing plate is provided with a V-type groove with a set period numberN and a fixed period length lambda, the lower metal fixing base is provided with U-type grooves with different curvature radii, and optical fibers are fixed in the U-type grooves so as to be kept bentby a certain curvature radius R. The mechanical chirp long-period fiber bragg grating is simple in structure, convenient to manufacture and good in repeatability.

Description

technical field [0001] The invention relates to the fields of optical fiber sensing, communication and fiber grating preparation, in particular to a mechanically chirped long-period fiber grating. technical background [0002] Chirped long-period fiber grating (CLPFG) is a special type of long-period fiber grating (LPFG) whose period varies along the fiber axis. Compared with ordinary LPFG, CLPFG has a great competitive advantage in the field of communication due to its wide bandwidth, multi-wavelength bandstop in the transmission spectrum, and the characteristics of being suitable for multi-wavelength filtering. In practical communication applications, CLPFG can be used as an EDFA gain flattening filter, or cascaded as a wavelength division multiplexing isolation filter. In addition, CLPFG is sensitive to changes in the external environment (pressure, temperature, refractive index), and has good development prospects in sensing and measurement. [0003] The working princi...

Claims

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Application Information

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IPC IPC(8): G02B6/02
CPCG02B6/02123
Inventor 张明胡张俊薛林林卢媛许卓锴
Owner ZHEJIANG UNIV OF TECH
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