Abstract
We present the first demonstration ofE-field tuning of an InP-based grating-assisted vertical codirectional coupler filter with an InAIGaAs/InGaAsP MQW region in one of the waveguide cores. This filter exhibits 16 nm tuning by QW-electrorefraction, which is the highest value reported to our knowledge. The device has 3.2 nm bandwidth at 1568 nm for 1.6 mm interaction length, very low losses, good sidelobe suppression, high coupling efficiency and a modified polarization dependence.
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