Fiber optic white light interferometric spectrum signal processing for absolute measurements

Hai Xiao; Wei Huo; Jiangdong Deng; Ming Luo; Zhiguang Wang; Russell G. May; Anbo Wang

doi:10.1117/12.372828

8 December 1999 Fiber optic white light interferometric spectrum signal processing for absolute measurements

Hai Xiao, Wei Huo, Jiangdong Deng, Ming Luo, Zhiguang Wang, Russell G. May, Anbo Wang

Proceedings Volume 3852, Harsh Environment Sensors II; (1999) https://doi.org/10.1117/12.372828
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

We present that development of a whitelight interferometric spectrum based signal processing method for fiber optic absolute sensing. The signal processing method achieves an extremely high resolution over a large dynamic range. The signal processing techniques are demonstrated on a whitelight fiber optic sensor system which uses a broadband LED as its source, and an low finesse extrinsic Fabry-Perot cavity as its sensing element. The interferometric spectrum from the sensor is received and processed through a computer compatible spectrometer which used a grating to disperse the light and a CCD array to record the spectrum. The experimental results show that the system achieves absolute measurement with nanometer accuracy over a range of more than 16 micrometers .

Citation Download Citation

Hai Xiao, Wei Huo, Jiangdong Deng, Ming Luo, Zhiguang Wang, Russell G. May, and Anbo Wang "Fiber optic white light interferometric spectrum signal processing for absolute measurements", Proc. SPIE 3852, Harsh Environment Sensors II, (8 December 1999); https://doi.org/10.1117/12.372828

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