High extinction ratio characteristics of over 60dB Mach-Zehnder modulator with asymmetric power-splitting Y-branches on X-cut Ti:LiNbO3

Yuya Yamaguchi, Shinya Nakajima, Atsushi Kanno, Tetsuya Kawanishi, Masayuki Izutsu, Hirochika Nakajima

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We discuss the performance of Mach-Zehnder modulators with asymmetric power-splitting Y-branches theoretically and confirmed it experimentally. The output characteristics of the modulator depend on the relationship between the power splitting ratios of the front and the back Y-branches. Even if the modulator consists of two asymmetric Y-branches, we can achieve high-extinction-ratio operation, with an additional loss as compared with the ideal case, by tuning the splitting ratio of only one of the two Y-branches. The additional loss, however, is small in many cases because the asymmetry considered here iscaused by fabrication errors.

Original languageEnglish
Article number08MB03
JournalJapanese journal of applied physics
Volume53
Issue number8 SPEC. ISSUE 2
DOIs
Publication statusPublished - 2014 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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