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A Widely Tunable Vernier Filter on a Ge-on-SOI Platform for Sensing Applications

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We present a Vernier tunable racetrack resonator filter on Ge-on-SOI, with 110 nm FSR at 5 μm. The racetrack has a Q-factor of 20000 and side-peak suppression >20 dB, sufficient for wavelength selection in an external cavity laser.

© 2018 The Author(s)

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