Faraday rotation mirror independent of wavelength and temperature

A technology of Faraday rotating mirror and Faraday optical rotation, which is applied in the coupling of optical waveguide, light guide, optics, etc., can solve the problems of affecting the test results of optical fiber sensors, difficulty in reducing coupling loss, and complex structure, so as to ensure the quality of signal transmission and reduce optical Loss, the effect of fewer optical elements

Pending Publication Date: 2017-07-25
沃土光纤通信(深圳)有限公司
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Problems solved by technology

In the optical fiber sensor system based on the Michelson interference principle, the ordinary Faraday rotating mirror is used for the dispersion and temperature characteristics of the Faraday rotator itself, which will cause the intensity change of the reflection peaks of the two interference arms in the interferometer, which will affect the test results of the optical fiber sensor. , not suitable for optical fiber sensors using wavelength division multiplexing technology and working environments with large temperature changes
In order to improve the temperature characteristics of the Faraday rotating mirror, some improvements have been proposed at home and abroad, such as patents CN201310646181.0, CN20141046502, CN201510649888.6, etc.; but this type of Faraday rotating mirror requires multiple prisms, and the structure is complex; the spot after collimation is large , it is difficult to reduce the coupling loss, especially for fiber products with small mode field diameters

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  • Faraday rotation mirror independent of wavelength and temperature

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[0018] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] see figure 1 , a kind of Faraday rotating mirror 1 that the present invention has nothing to do with wavelength and temperature, comprises an optical fiber head 11, a Nomarski prism 12, a Faraday optical mirror 13 and a concave reflector 14, optical fiber head 11, Nomarski The Skyprism 12 , the Faraday rotator 13 and the concave reflector 14 are arranged in sequence along the same straight line, and are spaced apart from each other. The main function of the optical fiber head 11 is to emit light signals, and the Nomarski prism 12 mainly plays the role of light splitting, an...

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Abstract

The present invention relates to the fields of optical fiber sensing and optical fiber communication, in particular to a Faraday rotating mirror independent of wavelength and temperature, comprising an optical fiber head, a Nomarski prism, a Faraday optical rotating mirror and a concave reflector, the optical fiber head, The Nomarski prism, the Faraday rotator and the concave reflector are arranged sequentially along the same line, and are arranged at intervals between each other. Highly reflective film. Compared with the prior art, the wavelength- and temperature-independent Faraday rotator provided by the present invention uses a concave reflector, and the emission light emitted from the fiber head is reflected and converged at the fiber head, which is easy to couple and realizes low loss.

Description

[0001] 【Technical field】 [0002] The invention relates to the fields of optical fiber sensing and optical fiber communication, in particular to a Faraday rotating mirror independent of wavelength and temperature. [0003] 【Background technique】 [0004] Optical fiber sensing technology is more and more widely used in oil exploration, perimeter security, underwater acoustic positioning and other fields, among which the application of optical fiber sensor based on Michelson interference principle is very common. In the optical fiber sensor system based on the Michelson interference principle, the ordinary Faraday rotating mirror is used for the dispersion and temperature characteristics of the Faraday rotator itself, which will cause the intensity change of the reflection peaks of the two interference arms in the interferometer, which will affect the test results of the optical fiber sensor. , not suitable for optical fiber sensors using wavelength division multiplexing technolo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/27G02B6/35
CPCG02B6/2746G02B6/35
Inventor 周卫
Owner 沃土光纤通信(深圳)有限公司
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