Abstract

The temporal coherence effect of a light source on a fiber-optic Fabry-Perot interferometer is described. The ratio of the end-mirror separation h to the coherence length Lc of a single-frequency laser source gives an important parameter to specify the transmission characteristics of the interferometer. A criterion to determine the largest permissible mirror separation, hc, is discussed and given by hc = (0.1/2π) Lc. The peak transmission and finesse are heavily dependent on the ratio h/Lc. The sensing sensitivity is also discussed in association with the ratio h/Lc.

© 1982 Optical Society of America

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