We present an analytical model for single mode, multiply reflected, external cavity, optical fiber Fabry–Perot interferometers in the low finesse regime using simple geometry and the Gaussian beam approximation. The multiple reflection model predicts attenuation of the peak-to-peak interference as the fiber to mirror distance approaches zero, as well as fringe asymmetry in the presence of nonabsorbing mirrors. A series of experiments are conducted in which a series of fiber Fabry–Perot cavities are constructed using uncoated, single mode glass fibers, and mirrors of varying reflectivity. The cavity length is swept, and the predictions of the model are found to be in good agreement with the experimental interferograms.
(060.2310) Fiber optics and optical communications : Fiber optics
Fiber Optics and Optical Communications
Original Manuscript: October 13, 2010
Revised Manuscript: December 16, 2010
Manuscript Accepted: July 7, 2011
Published: August 8, 2011
Paul R. Wilkinson and Jon R. Pratt, "Analytical model for low finesse, external cavity, fiber Fabry–Perot interferometers including multiple reflections and angular misalignment," Appl. Opt. 50, 4671-4680 (2011)