Tunable desensitization miniature fiber optic interferometer
A technology of optical fiber interferometer and interferometer, which is applied in the direction of instruments, optical devices to transmit sensing components, measuring devices, etc., can solve the problems of inconvenient use, large volume, and reduced demodulation system performance, and achieve sound sensitivity reduction, The effect of good stability
Active Publication Date: 2021-11-19
LASER RES INST OF SHANDONG ACAD OF SCI
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Problems solved by technology
In this way, the interference arm of the fiber optic interferometer is easily affected by the external environment. The external temperature change, the sound and vibration of the external environment will cause slight changes in the optical refractive index and length of the two arms of the interferometer, because the lengths of the two interference arms are inconsistent. , it is easy to cause the phase difference of the two interference arms to change, thereby introducing background noise levels to the interferometer and degrading the performance of the demodulation system
At the same time, the existing fiber optic interferometer is bulky and inconvenient to use
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[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0025] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...
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Abstract
An embodiment of the present invention provides a tunable and desensitizing small optical fiber interferometer, which relates to the field of optical instruments and control equipment. Including: interferometer body, housing, semiconductor refrigeration patch, temperature sensing module and temperature control module; there is a cavity inside the housing, and the interferometer body is set in the cavity; semiconductor refrigeration patch is attached to the outer surface of the housing The temperature sensing module is arranged in the cavity for measuring the temperature value in the cavity; the temperature of the interferometer body is also arranged in the cavity; the temperature control module is arranged outside the cavity, and is connected with the temperature sensing module and semiconductor refrigeration Chip connection, which is used to drive the semiconductor cooling patch to cool down or heat up the shell so that the shell can be maintained near a stable temperature value. In addition, the overall potting method of the potting compound makes the tunable desensitization small fiber optic interferometer not only have the advantages of good temperature control and small size, but also have the function of reducing the sensitivity to vibration and sound.
Description
technical field [0001] The invention relates to the field of optical instruments and control equipment, in particular to a tunable and desensitizing small optical fiber interferometer. Background technique [0002] The interferometer is a key device in the field of high-sensitivity optical fiber sensing. Its function is to convert the wavelength change of the optical fiber sensor into a corresponding phase change, and at the same time play a role in signal amplification. It has an important application in high-resolution wavelength demodulation systems. Each of its optical paths is called an interference arm of the interferometer. For high-resolution wavelength demodulation, it is often necessary for each interference arm of the interferometer to have a long arm length difference, so as to greatly amplify the wavelength change into a phase change and improve the system resolution. In this way, the interference arm of the fiber optic interferometer is easily affected by the ...
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IPC IPC(8): G01D5/353
CPCG01D5/35306
Inventor 张发祥王昌倪家升姜劭栋张晓磊马龙
Owner LASER RES INST OF SHANDONG ACAD OF SCI