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Optimization method of driving voltage for tunable Fabry-Perot filter

A technology of driving voltage and optimization method, which is applied in the direction of instruments, optical components, optics, etc., can solve the problems of bandwidth waste, high price, bandwidth occupied by reference gratings, etc., and achieve the effect of high reliability, low cost, and strong portability

Active Publication Date: 2021-09-07
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Reference rasters occupy limited bandwidth, resulting in wasted bandwidth
Fabry-Perot etalons are expensive, adding substantially to the cost of the measurement system

Method used

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  • Optimization method of driving voltage for tunable Fabry-Perot filter
  • Optimization method of driving voltage for tunable Fabry-Perot filter
  • Optimization method of driving voltage for tunable Fabry-Perot filter

Examples

Experimental program
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Embodiment Construction

[0014] like figure 1 Fiber Bragg grating wavelength demodulation system diagram of a tunable Fabry-Perot filter, the system shown uses amplified spontaneous emission as a light source, a light source output of the fiber Bragg grating sensor system coupling light into the optical fiber after Bragg grating array, the reflected light is again entered after a tunable optical filter coupler, and then proceeds to the data acquisition device, and finally the data processed by a computer. After the data acquisition element analog voltage output port for driving amplified tunable optical filter. When the tunable optical filter transmittance continuously changes the position at the driving voltage, dynamically collect all the reflection spectrum of the grating, to achieve a plurality of strain detecting parameters simultaneously.

[0015] The conventional AC driving voltage (e.g. figure 2 ) Shown in portion rising voltage into a plurality of segments gradually increasing DC voltage, such as...

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Abstract

The invention relates to a driving voltage optimization method for a tunable Fabry-Perot filter, which converts the rising part of the traditional AC driving voltage into a plurality of gradually increasing DC voltage segments, and searches for the optimal split voltage through the particle swarm algorithm. The duration of the segment DC voltage is used to obtain the optimized DC voltage; the center position of the reflection peak obtained by scanning the traditional AC voltage drive is converted into the center position of the response of the adjustable filter under the optimized DC voltage to obtain the final AC-DC drive Voltage. To effectively compensate the voltage-wavelength nonlinearity of the tunable Fabry-Perot filter, without adding any hardware equipment, only digital compensation is used to correct the AC drive voltage, thereby compensating for the nonlinearity of the filter. The method of the invention has low cost, strong transplantability and high reliability.

Description

Technical field [0001] The present invention relates to a fiber Bragg grating sensing demodulation techniques, and more particularly to tunable Fabry-Perot filter based on the driving voltage Particle Swarm Optimization. Background technique [0002] The method of the Fabry-Perot tunable filter today compensation is the use of nonlinear Fabry-Perot etalon or a grating reference to acquire a reference wavelength, in order to suppress Fabry-Perot tunable filter - voltage non-linear. Reference Raster takes up limited bandwidth, resulting in a waste of bandwidth. Fabry-Perot etalon is expensive, a substantial increase in the cost of the measurement system. Inventive content [0003] The present invention is a method of publishing presence of nonlinear compensation for a normal Lipo Luo filter tunable problem, we propose a Fabry-Perot tunable filter drive voltage optimization method using a plurality of different durations, different voltage amplitude conventional AC driving voltage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00
CPCG02B27/0012
Inventor 盛文娟
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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