Double-edge cross demodulation and nonlinear correction method of piezoelectric ceramic type tunable wavelength filter

A piezoelectric ceramic and filter technology, which is applied in the field of double-edge cross-demodulation and nonlinear correction, can solve the problem of difficulty in eliminating the double-edge hysteresis effect, and achieves the effect of improving the demodulation speed and eliminating the demodulation error.

Active Publication Date: 2016-01-27
WUHAN WUTOS
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fast and high-precision double-edge crossover solution that can effectively correct the hysteresis effect of piez

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  • Double-edge cross demodulation and nonlinear correction method of piezoelectric ceramic type tunable wavelength filter
  • Double-edge cross demodulation and nonlinear correction method of piezoelectric ceramic type tunable wavelength filter
  • Double-edge cross demodulation and nonlinear correction method of piezoelectric ceramic type tunable wavelength filter

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[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0039] Such as figure 2 As shown, in the embodiment of the present invention, a piezoelectric ceramic tunable wavelength filter bilateral edge cross demodulation and nonlinear correction system is characterized in that it includes a light source 1, a piezoelectric ceramic tunable wavelength filter 2, an optical splitter 7 , Optical grid generator 3, photoelectric conversion module 4, data acquisition module 5 and data processing and correction module 6.

[0040] The light source 1 provides light energy for the entire system. It is a broad-spectrum light source, and its output spectral range shou...

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Abstract

The invention discloses a double-edge cross demodulation and nonlinear correction method of a piezoelectric ceramic type tunable wavelength filter. The double-edge cross demodulation and nonlinear correction method comprises the following steps of making light of a wide-spectrum light source enter an optical splitter through the piezoelectric ceramic type tunable wavelength filter, wherein the light is divided to two paths by the optical splitter, the first-path light penetrates through an optical grid generator and is collected as a standard spectrum, and the second-path light is directed collected as a to-be-measured spectrum; and performing grouped cross demodulation and correction on the collected data. The corrected demodulation result can eliminate the function of a piezoelectric ceramic hysteresis effect and furthermore improves demodulation efficiency.

Description

Technical field [0001] The invention belongs to the field of optical fiber sensing devices, and in particular relates to a method and system for bilateral edge cross demodulation and nonlinear correction of a piezoelectric ceramic type tunable wavelength filter. Background technique [0002] Tunable wavelength filters are the core devices in the field of optical fiber sensing, and there are many types, such as current tuning type, voltage tuning type, piezoelectric ceramic type and so on. Among them, piezoelectric ceramic type tunable wavelength filter has many advantages such as fast response speed, no heat, large thrust, high wavelength resolution, etc., and it has a wide range of applications in the field of optical fiber sensing. For example, it can be used for wavelength demodulation of fiber grating sensors. Device. The piezoelectric ceramic tunable wavelength filter uses a Fabry-Perot structure to change the distance between two mirrors through piezoelectric ceramics to a...

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Application Information

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IPC IPC(8): G02F2/00G01D5/26
CPCG01D5/26G02F2/00
Inventor 李凯董雷印新达
Owner WUHAN WUTOS
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