Mode controller improving interference spectrum of sapphire fiber FP sensor

A mode control and sensor technology, which is applied in the direction of converting sensor output, using optical devices to transmit sensing components, measuring devices, etc., can solve the problem of low visibility of interference signals, and achieve the effect of improving visibility, improving range and measurement accuracy

Pending Publication Date: 2019-11-05
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a sapphire fiber FP sensor interference spectrum enhancement device and method for the low defect of interference signal visibility in the sapphire fiber FP sensor in the prior art

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  • Mode controller improving interference spectrum of sapphire fiber FP sensor
  • Mode controller improving interference spectrum of sapphire fiber FP sensor
  • Mode controller improving interference spectrum of sapphire fiber FP sensor

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further 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.

[0024] Such as figure 1 As shown, the present invention provides a mode control device for enhancing the interference spectrum of a sapphire fiber optic FP sensor, including an optical filtering optical circuit, and the optical filtering circuit includes a light source 1, a first lens 2, a diaphragm 3, and a second lens arranged on a common optical axis 4 and a shaping filter 5, the first lens 2 and the second lens 4 are set confocally, a diaphragm 3 is set at the confocal place, and a shaping filter 5 is set behind the second lens 4.

[0025] Such as figure 2 As shown, the shaping filter 5 is d...

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Abstract

The invention discloses a mode controller improving the interference spectrum of a sapphire fiber FP sensor. A shaping filter is used to optically filter a light beam so as to remove most high light fields of a high order mode and obtain a light field matching the fundamental mode of the sapphire fiber FP sensor, and further the light filed input to the sapphire fiber FP sensor matches the fundamental mode of the sapphire fiber FP sensor, and the number of modes spread in sapphire fiber is controlled. The invention also provides a processing method of the shaping filter. Thus, the visibility of the interference spectrum of the sapphire fiber FP sensor can be effectively improved, the range of the sapphire fiber FP sensor is widened, and the measuring precision of the sapphire fiber FP sensor is improved.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, in particular to a mode control method for the interference spectrum of a sapphire optical fiber Fabry-Perot (FP) sensor. Background technique [0002] Aerospace technology has important strategic significance for national defense security and economic development. In order to ensure the safe and stable operation of the spacecraft, various sensors are required to collect and transmit the information of each part of the system in a timely manner. For some aerospace systems, such as aeroengines and hypersonic vehicles, the operating temperature is above 1300 °C, and the working environment is highly corrosive and the electromagnetic environment is complex. To obtain information such as stiffness, strength, stress, and strain of related objects under such harsh working conditions, there are very high requirements for sensors. Most sensors are not competent for the relevant work, but the meltin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353G02B27/09
CPCG01D5/35312G02B27/0988
Inventor 张东升张家伟贾晓雯
Owner WUHAN UNIV OF TECH
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