Abstract

We developed and fabricated an all-fiber add–drop filter by recording a Bragg grating in the waist of an asymmetric mode converter–coupler formed by adiabatic tapering and fusing of two locally dissimilar, single-mode optical fibers. The insertion loss of the device was ~0.1 dB .A narrow spectral bandwidth (<1 nm) and a large add–drop efficiency (>90%) were also demonstrated. In addition, the filter was polarization independent.

© 1998 Optical Society of America

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