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Double-edge Crossover Demodulation and Nonlinear Correction Method of Piezoelectric Ceramic Tunable Wavelength Filter

A non-linear correction, piezoelectric ceramic technology, applied in optical demodulation, instrumentation, optics, etc., can solve the problem that the double edge hysteresis effect is difficult to eliminate, and achieve the effect of improving the demodulation speed and eliminating the demodulation error.

Active Publication Date: 2017-12-29
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 piezoelectric ceramics for the defect that the double-edge hysteresis effect of piezoelectric ceramics is difficult to eliminate in the prior art. Adjustment and nonlinear correction method and system

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  • Double-edge Crossover Demodulation and Nonlinear Correction Method of Piezoelectric Ceramic Tunable Wavelength Filter
  • Double-edge Crossover Demodulation and Nonlinear Correction Method of Piezoelectric Ceramic Tunable Wavelength Filter
  • Double-edge Crossover Demodulation and Nonlinear Correction Method of Piezoelectric Ceramic Tunable Wavelength Filter

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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] like figure 2As shown, in the embodiment of the present invention, the double-edge crossover demodulation and nonlinear correction system of the piezoelectric ceramic type tunable wavelength filter is characterized in that it includes a light source 1, a piezoelectric ceramic type tunable wavelength filter 2, and a beam splitter 7. An optical grid generator 3 , a photoelectric conversion module 4 , a data acquisition module 5 , and a data processing and correction module 6 .

[0040] The light source 1 provides light energy for the whole system. It is a wide-spectrum light source, and its ...

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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, and in particular relates to a method and system for double-edge cross demodulation and nonlinear correction of a piezoelectric ceramic 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, etc. Among them, the piezoelectric ceramic tunable wavelength filter has a wide range of applications in the field of optical fiber sensing due to its fast response, no heat generation, large thrust, and high wavelength resolution. For example, it can be used for wavelength demodulation of fiber grating sensors. device. The piezoelectric ceramic tunable wavelength filter utilizes the Fabry-Perot structure to achieve variable wavelength output by changing the distance between two mirrors through piezoelectric cerami...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F2/00G01D5/26
CPCG01D5/26G02F2/00
Inventor 李凯董雷印新达
Owner WUHAN WUTOS
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