title: Integrated hybrid Si/InGaAs 50 Gb/s DQPSK receiver.
abstract: A monolithic 25 Gbaud DQPSK receiver based on delay interferometers and balanced detection has been designed and fabricated on the hybrid Si/InGaAs platform. The integrated 30 µm long InGaAs p-i-n photodetectors have a responsivity of 0.64 A/W at 1550 nm and a 3dB bandwidth higher than 25 GHz. The delay interferometer shows a delay time of 39.2 ps and an extinction ratio higher than 20 dB. The demodulation of a 25 Gb/s DPSK signal by a single branch of the receiver demonstrates its correct working principle.
authors.affiliation: Electrical and Computer Engineering Department, University of California, Santa Barbara, CA 93106, USA. sfaralli@sssup.it
authors.forename: Stefano
authors.initials: S
authors.lastname: Faralli
authors.forename: Kimchau N
authors.initials: KN
authors.lastname: Nguyen
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Peters
authors.forename: Daryl T
authors.initials: DT
authors.lastname: Spencer
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Blumenthal
authors.forename: John E
authors.initials: JE
authors.lastname: Bowers
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008872:Microwaves; D018511:Systems Integration; D013685:Telecommunications / Q000295:instrumentation*