Narrowband tunable photonic notch filter.
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 10 MHz filter with 5.5 dB insertion loss and 45.5 dB of in-band rejection. The measured rejection value is limited by the finite (3 kHz) linewidth of our laser. We show that the filter can potentially have tunable bandwidth without significant rejection modification.
Savchenkov
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OEwaves, Inc., 2555 East Colorado Boulevard, Pasadena, California 91107, USA.
Liang
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Matsko
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Ilchenko
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Seidel
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Maleki
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