FIBER-BASED DEVICES

Novel data processing techniques for dispersive white light interferometer

[+] Author Affiliations
Bing Qi, Gary R. Pickrell, JunCheng Xu, Po Zhang, Yuhong Duan, Wei Peng, Zhenyu Huang, Wei Huo, Hai Xiao, Russell G. May, Anbo Wang

Virginia Polytechnic Institute and State University, The Bradley Department of Electrical and Computer Engineering, Center for Photonics Technology, 460 Turner Street, Suite 303, Blacksburg, Virginia?24061 E-mail: pickrell@vt.edu

Opt. Eng. 42(11), 3165-3171 (Nov 01, 2003). doi:10.1117/1.1613958
History: Received Jan. 23, 2003; Revised Apr. 17, 2003; Accepted Apr. 18, 2003; Online October 31, 2003
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White light interferometry has been used in the sensing area for many years. A novel data processing method for demodulating the information from the interference spectrum of a white light system is presented. Compared with traditional algorithms, both high-resolution and large dynamic range have been achieved with a relatively low-cost system. Details of this arithmetic are discussed. A compact white light interferometric system employing this algorithm has been developed, combined with fiber Fabry-Perot sensors. A ±0.5-nm stability over 48 hours with a dynamic range on the order of tens of microns has been achieved with this system. The temperature dependence of this system has been analyzed, and a self-compensating data processing approach is adopted. Experimental results demonstrated a ±1.5-nm shift in the temperature range of 10 to 45°C. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

Bing Qi ; Gary R. Pickrell ; JunCheng Xu ; Po Zhang ; Yuhong Duan, et al.
"Novel data processing techniques for dispersive white light interferometer", Opt. Eng. 42(11), 3165-3171 (Nov 01, 2003). ; http://dx.doi.org/10.1117/1.1613958


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