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Temperature compensated fiber bragg's grating filter
Temperature compensated fiber bragg's grating filter
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机译:温度补偿光纤布拉格光栅滤光片
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摘要
The present invention provides a filter composed of two layers of materials with different expansion coefficients. The difference between a length added to a whole section length of an outer low-expansion coefficient metal sleeve by a temperature change and a length added to a length of a whole section of high-expansion coefficient cylindrical coil spring arranged therein by the temperature change causes a stress-releasing or stress-increasing effect on the whole section of pre-tensioned high-expansion coefficient cylindrical coil spring arranged therein, so that a structure capable of compensating the wavelength shift of the fiber Bragg's grating filter caused by temperature by increasing or decreasing the refractive index is achieved.
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