A Tunable Dispersion Compensating MEMS Allpass Filter
01 January 2000
A tunable dispersion compensating filter based on a multi-stage optical allpass filter with a micro-electromechanical (MEM) actuated variable reflector and thermally tuned cavity is described. A two-stage device was demonstrated with a tuning range of +-100 ps/nm, 50 GHz passband and a group delay ripple less than +-3 ps. The device has negligible polarization dependence and is suitable for single or multiple channel compensation. An off-axis, two-fiber package with an excess loss