Optical fibre transducer general purpose high speed waveguide wavelength scanning demodulation process and apparatus
A technology of optical fiber sensor and waveguide wavelength, which is applied in the direction of transmitting sensing components, measuring devices, instruments, etc. by using optical devices, can solve problems such as poor linearity, difficult process, hysteresis, etc., and achieve linearity and repeatability improvement, integrated optics Effects of process maturity, reliability and life improvement
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[0026] The present invention will be further elaborated below in conjunction with accompanying drawing:
[0027] See attached figure 1 The general-purpose, high-speed waveguide wavelength scanning demodulation device for fiber optic sensors consists of four parts: a broadband superluminescence (SLD) light source 1, a fiber optic path 2, a tunable waveguide filter 3, and a detection and signal processor 4. Fiber optic path 2 is composed of two Y-shaped single-mode fiber beam splitters; its three ports are respectively connected to SLD light source 1, tunable waveguide filter 3, detection and signal processor 4; the other port is used as the optical output of the instrument The / input port is connected with the external optical fiber sensor 5 . see figure 2 , the tunable waveguide filter 3 is composed of three components such as a single-mode optical waveguide 9, a modulator 10, and a Bragg grating 11 integrated on a piece of lithium niobate crystal; wherein the single-mode o...
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