InP -based high-speed Mach-Zehnder modulator

N. Kikuchi, K. Tsuzuki, E. Yamada, H. Yasaka, T. Ishibashi

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


We propose a novel InP-based traveling-wave electrode Mach-Zehnder modulator. It has an n-i-n isotype heterostructure to reduce both electrical signal loss and the optical loss caused by the p-type cladding layer. This device provides a large modulation bandwidth of more than 40 GHz. We have also developed a compact push-pull driven modulator module. We obtained error-free operation for a 40-Gbit/s NRZ signal in a push-pull configuration with a very low driving voltage of 1.3 Vpp. We also confirmed that the modulator has low chirp characteristics by demonstrating a 100-km SMF transmission with a penalty of less than 1.5 dB for a 10-Gbit/s NRZ signal.

Original languageEnglish
Article number601409
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2005
EventActive and Passive Optical Components for WDM Communications V - Boston, MA, United States
Duration: 2005 Oct 242005 Oct 26


  • MMI coupler
  • Mach-Zehnder modulator
  • Microstrip line
  • SI-InP
  • Traveling-wave electrode
  • n-i-n isotype heterostructure


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