Abstract

We propose a technique for realization of a high-contrast, tunable, low-insertion-loss notch filter using polarization selectivity of whispering-gallery-mode resonators. We demonstrate a 10MHz filter with 5.5dB insertion loss and 45.5dB of in-band rejection. The measured rejection value is limited by the finite (3kHz) linewidth of our laser. We show that the filter can potentially have tunable bandwidth without significant rejection modification.

© 2009 Optical Society of America

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