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A tunable GaInAsP-InP optical microring notch filter
Journal article

A tunable GaInAsP-InP optical microring notch filter

R. Grover, T.A. Ibrahim, S. Kanakaraju, L. Lucas, L.C. Calhoun and P.-T. Ho
IEEE photonics technology letters, Vol.16(2), pp.467-469
01/02/2004
DOI: https://doi.org/10.1109/LPT.2003.823092

Abstract

Lithography Optical filters Optical refraction Optical resonators Optical superlattices Optical surface waves Optical variables control Optical waveguides Quantum well devices Refractive index
The authors demonstrate an ultracompact tunable GaInAsP-InP microring notch filter. The core of the device is a quantum-well superlattice and forms the intrinsic region in a p-n structure. The device has curved sections of radius 2.25 μm and straight sections of length 1 μm, making it the smallest microring filter ever reported. They obtain 0.8 nm (100 GHz) of tuning by reverse-biasing the diode structure over 8 V using the quadratic electrooptic effect.

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