A Tunable GaInAsP-InP Optical Microring Notch Filter Grover, R. ; Ibrahim, T. A. ; Kanakaraju, S. ; Lucas, L. ; Calhoun, L. C. ; Ho, P. -T. Abstract Publication: IEEE Photonics Technology Letters Pub Date: February 2004 DOI: 10.1109/LPT.2003.823092 Bibcode: 2004IPTL...16..467G