title: Tunable silicon Fabry-Perot comb filters formed by Sagnac loop mirrors.
abstract: We experimentally demonstrate tunable silicon comb filters based on Fabry-Perot (FP) resonators composed of two Sagnac loop mirrors. The comb filter resolves up to 54 comb lines with a 115 GHz channel spacing over a spectral range from 1510 to 1560 nm. The comb line extinction ratio is ~26.3 dB and the quality factor is ~57,000 around 1550 nm wavelength. Electrical tuning is enabled via periodically interleaved PN junctions embedded inside the FP resonator. The comb lines are blue shifted by ~0.92 nm (one channel spacing) with a 5 mA forward-bias current and red-shifted by ~0.05 nm with a -10 V reverse-bias voltage.
authors: State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Xiaomeng
authors: X
authors: Sun
authors: Linjie
authors: L
authors: Zhou
authors: Jingya
authors: J
authors: Xie
authors: Zhi
authors: Z
authors: Zou
authors: Liangjun
authors: L
authors: Lu
authors: Haike
authors: H
authors: Zhu
authors: Xinwan
authors: X
authors: Li
authors: Jianping
authors: J
authors: Chen