Novel data processing techniques for dispersive white light interferometer

作者：Qi B^*; Pickrell GR; Xu JC; Zhang P; Duan YH; Peng W; Huang ZY; Huo W; Xiao H; May RG; Wang A

来源：Optical Engineering, 2003, 42(11): 3165-3171.

DOI：10.1117/1.1613958

• white light interferometer
• fiber optic sensor
• temperature compensation

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 45degreesC.

• 出版日期2003-11