Differential phase-shift-keying demodulation by coherent perfect absorption in silicon photonics

作者：Ahmed Asif; Yang Hao; Rothenberg Jacob M; Souhan Brian; Wang Zhao; Abrams Nathan C; Meng Xiang; Ingold Kirk A; Evans Christopher C; Hensley Joel M; Bergman Keren; Grote Richard R; Knights Andrew P; Dadap Jerry I^*; Osgood Richard M Jr

来源：Optics Letters, 2018, 43(16): 4061-4064.

DOI：10.1364/OL.43.004061

We demonstrate a novel differential phase-shift-keying (DPSK) demodulator based on coherent perfect absorption (CPA). Our DPSK demodulator chip device, which incorporates a silicon ring resonator, two bus waveguide inputs, and monolithically integrated detectors, operates passively at a bit rate of 10 Gbps at telecommunication wavelengths, and fits within a mm-scale footprint. Critical coupling is used to achieve efficient CPA by tuning the gap between the ring and bus waveguides. The device has a vertical eye opening of 12.47 mV and a quality factor exceeding 3 x 10(4). The fundamental principle behind this photonic circuit can be extended to other formats of integrated demodulators.

• 出版日期2018-8-15