This paper presents a simple and effective design of taper-based higher order mode (HOM) filters that can effectively remove HOMs from the few-mode fibers. For this purpose, a taper manufacturing technique that allows the production of long and highly uniform tapers was developed. A filter performance was demonstrated on a standard single-mode telecommunication fiber operating at 850 nm. The HOM suppression was better than -39 dB, and the insertion loss of the fundamental mode was less than 0.15 dB.
© 2006 IEEE
Denis Đonlagic, "In-Line Higher Order Mode Filters Based on Long Highly Uniform Fiber Tapers," J. Lightwave Technol. 24, 3532- (2006)