title: Slow-light-based variable symbol-rate silicon photonics DQPSK receiver.
abstract: We report a silicon DQPSK receiver whose symbol rate can be varied by a tunable one-bit delay line including an all-pass micro-ring slow-light device. It also consists of Si-wire waveguides with spot-size converters, optimized splitters/couplers, heater-controlled Mach-Zehnder attenuators and phase shifters, 90° hybrid with a low-loss crossing and balanced Ge photodiodes, all of which are fabricated by using CMOS-compatible process. Demodulation was confirmed at symbol-rates of 7.4 - 9.0 Gbaud, corresponding to bit-rates of 14.8 - 18.0 Gb/s.
authors.affiliation: Department of Electrical and Computer Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogayaku, Yokohama, 240-8501, Japan.
authors.forename: Keijiro
authors.initials: K
authors.lastname: Suzuki
authors.forename: Hong C
authors.initials: HC
authors.lastname: Nguyen
authors.forename: Takemasa
authors.initials: T
authors.lastname: Tamanuki
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Shinobu
authors.forename: Yuji
authors.initials: Y
authors.lastname: Saito
authors.forename: Yuya
authors.initials: Y
authors.lastname: Sakai
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Baba