A New Optical Fiber Birefringence Measurement Method Based on Polarization Detection and Wavelength Scanning

2012 ◽  
Author(s):  
Li Zhizhong ◽  
Liu Qijun ◽  
Zheng Lei ◽  
Wang Yichuan ◽  
Xu Zhongliang
Keyword(s):  
Optical Fiber ◽  
Measurement Method ◽  
Fiber Birefringence ◽  
Wavelength Scanning ◽  
Polarization Detection

scholarly journals Fiber Optic Vibration Sensors

2021 ◽  
Author(s):  
Putha Kishore ◽  
Dantala Dinakar ◽  
Manchineellu Padmavathi
Keyword(s):  
Optical Fiber ◽  
Measurement Method ◽  
Fiber Optic ◽  
Sensor Response ◽  
Vibration Sensor ◽  
Vibration Measurement ◽  
Sensor Design ◽  
Plastic Optical Fiber ◽  
Intensity Modulated ◽  
Vibration Sensors

The sensors presented in this chapter are fiber optic intensity modulated vibrations sensors which are non-contact (extrinsic sensor) to the vibrating object. Three sensors presented make use of non-contact vibration measurement method with plastic fiber using distinct designs, improvement of the sensor response and advantages of one sensor over the other for diverse applications. First discussed about dual plastic optical fiber vibration sensor design and its response. Secondly, discussed about 1x2 fused coupler plastic optical fiber vibration sensor design with advantages over the first one. Finally, discussed about the 2x2 fused coupler plastic optical fiber vibration sensor design along with advantages than other two methods. At the end reported the final results with comparison.

Touch-Trigger Measurement of Micro-Cavity by Optical Fiber Coupling

2010 ◽  
Vol 437 ◽  
pp. 174-178
Author(s):  
Ji Wen Cui ◽  
Chuan Xi Song ◽  
Jiu Bin Tan
Keyword(s):  
Optical Fiber ◽  
Coming Out ◽  
Measurement Method ◽  
Lateral Displacement ◽  
Geometric Dimension ◽  
Hole Diameter ◽  
Fiber Coupling ◽  
Micro Hole ◽  
Measuring Machine ◽  
Micro Cavity

In order to measure the geometric dimension of a micro-cavity, a touch-trigger measurement method is proposed, in which the light coming from the incident optical fiber is transmitted in the reversal direction via the optical fiber coupling into the effluent optical fiber, the lateral displacement of the touch-trigger sensor is transformed into the deflexion of light coming out from the effluent optical fiber, and the deflexion is transformed into an image signal by the object lens and CCD capturing system. The effectiveness of the proposed method is verified by experiments. Experimental results indicate that the proposed method can be used to measure the geometric dimension of a micro-cavity. A blind hole of 1.5 mm deep and about 0.2 mm in diameter is measured with the touch-trigger sensor and self-developed micro-hole diameter measuring machine with a repeatability uncertainty of less than 0.2 m.

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