Waveform deterioration due to frequency chirping in a modulated light source limits the maximum transmission distance in multigigabit optical transmission systems. Semiconductor MWQ external modulators are expected to overcome the problems, because of their potential for low chirp and high-speed modulation and for optoelectronic integration.1,2 The Mach-Zehnder type (MZ) modulator has been proposed as one of the most promising, since it achieves zero or negative chirping which maximizes the transmission distance.3 Recently, a highly efficient and small size MQW MZ modulator was reported,4 but its driving voltage was still too high (~10 V with only ~7 dB of extinction ratio) for practical use. Here, we demonstrate a low driving voltage InGaAs/InALAs MQW MZ modulator with high extinction ratio (>15 dB), for 10-Gbit/s long-haul transmission systems operating in the 1.55-μm) wavelength region.

© 1992 Optical Society of America

PDF Article
More Like This
High-speed InGaAs/InAlAs MQW Mach-Zehnder-type optical modulator

Hirohisa Sano, Hiroaki Inoue, Shigehisa Tanaka, and Koji Ishida
ThK5 Optical Fiber Communication Conference (OFC) 1993

An InGaAs/InAlAs MQW Mach-Zehnder Type Optical Modulator with Flat and Wide Frequency Response

Hirohisa Sano, Tatemi Ido, Shigehisa Tanaka, and Hiroaki Inoue
ISaA5 Integrated Photonics Research (IPR) 1995

Field-induced refractive index change dependence on incident light wavelength and polarization to an InGaAs/InAlAs multi-quantum well

Hiroaki Inoue, Hirohisa Sano, and Shinji Nishimura
WH6 Integrated Photonics Research (IPR) 1992


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription