title: Silicon Mach-Zehnder modulator of extinction ratio beyond 10 dB at 10.0-12.5 Gbps.
abstract: Silicon Mach-Zehnder modulators with reduced series resistance in lateral PN junction rib-waveguide phase shifters for enhanced high-speed response are fabricated and characterized. Extinction ratio higher than 10 dB is obtained at 10.3-11.7 Gbps with mask margins of 27% (10.3-Gbps 10GBE), 16% (10.7-Gbps STM-64/OC-192) and 10% (11.3-Gbps STM-64/OC-192) in eye-diagram measurements incorporating mask tests using a RF cut-off filter. In unfiltered eye-diagram measurements without mask tests, extinction ratio higher than 13 dB is obtained at 10.0-12.5 Gbps. The silicon modulators reveal high-speed performance comparable with that of lithium-niobate modulators in high-speed optical fiber telecommunications.
authors.affiliation: Optics and Electronics Laboratory, Fujikura Limited, 1440 Mutsuzaki, Sakura, Chiba 205-8550, Japan. kensuke.ogawa@jp.fujikura.com
authors.forename: Kensuke
authors.initials: K
authors.lastname: Ogawa
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Goi
authors.forename: Yong Tsong
authors.initials: YT
authors.lastname: Tan
authors.forename: Tsung-Yang
authors.initials: TY
authors.lastname: Liow
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Tu
authors.forename: Qing
authors.initials: Q
authors.lastname: Fang
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Lo
authors.forename: Dim-Lee
authors.initials: DL
authors.lastname: Kwong