Abstract
We present a closed-loop technique for measuring wavelength shifts associated with fiber Bragg gratings by using a fused biconical wavelength division multiplexer (WDM). The spectral response of the WDM is actively tuned by stretching of the coupling region to maintain a fixed coupling ratio at the reflected Bragg wavelength. The closed-loop operation allows sensitivities usually associated with a highly selective WDM to be obtained without compromising the measurement range. A simple theoretical model is presented together with experimental results for temperature and strain measurements.
© 1998 Optical Society of America
Full Article | PDF ArticleMore Like This
Y. J. Rao, Z. L. Ran, and C. X. Zhou
Appl. Opt. 45(23) 5815-5818 (2006)
Kuo-Chih Chuang, Chien-Ching Ma, and Hwa-Chun Wang
Appl. Opt. 55(9) 2426-2434 (2016)
A. B. Lobo Ribeiro, Y. J. Rao, L. Zhang, I. Bennion, and D. A. Jackson
Appl. Opt. 35(13) 2267-2273 (1996)