Fiber grating wavelength demodulating device based on saturable absorption fiber

A saturable absorption, fiber grating technology, applied in the demodulation of light, the use of optical devices to transmit sensing components, optics, etc., can solve the problems of unusability, high cost, complex structure, etc., and achieve easy maintenance, simple and convenient use. , the effect of small size

Active Publication Date: 2013-12-11
NORTHWEST INST OF NUCLEAR TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the need to use a large number of crystal optical devices in this type of demodulatio

Method used

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Example Embodiment

[0028] The specific embodiments of the present invention will be described below according to the annular cavity structure and the linear cavity structure respectively.

[0029] figure 1 Shown is a schematic diagram of the structure of the device of the present invention in an annular cavity structure. Such as figure 1 As shown, the novel fiber grating wavelength demodulation device based on the saturable absorption fiber 5 of the present invention consists of a pump source 1, a wavelength division multiplexer 2, a gain fiber 3, an isolator 4, a saturable absorption fiber 5, and an output coupler 6. , Circulator 7, fiber grating 8-a to be tested and photoelectric detection system 9 and so on.

[0030] Firstly, the wavelength division multiplexer 2, gain fiber 3, isolator 4, saturable absorption fiber 5, output coupler 6 and circulator 7 are connected through a fiber fusion splicer to form a fiber loop; the pump source 1 It is connected to the fiber loop through the wavelength divisio

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Abstract

The invention discloses a fiber grating wavelength demodulating device based on a saturable absorption fiber. The device comprises a pumping source, a gain fiber, the saturable absorption fiber, a circulator, an annular cavity or linear cavity fiber laser formed by a fiber grating to be measured and a photoelectric detection system used for measuring the repetition frequency of lasers. By measuring the repetition frequency of the lasers, wavelength changes of the fiber grating to be measured are obtained through calculation, and wavelength demodulation is achieved. The fiber grating wavelength demodulating device based on the saturable absorption fiber avoids using spectral analysis equipment and thus lowers the wavelength demodulation cost. Meanwhile, an all-fiber demodulating system is obtained, the demodulating system is made to be small in size, easy to maintain and easy and convenient to use.

Description

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Claims

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Application Information

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Owner NORTHWEST INST OF NUCLEAR TECH
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