In-line higher order mode filters based on long highly uniform fiber tapersĐonlagić, Denis (Avtor) optical fibresfew moded fiberfiber designmode conversionmode filternoise figureoptical fiber dispersionoptical signal to noiseoptical transmission systemstaperThis 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 ofthe fundamental mode was less than 0.15 dB.20062012-05-31 10:43:10Neznano25750sl