Optical minimum-shift-keying transmitter based on a monolithically integrated quad Mach-Zehnder in-phase and quadrature modulator

Guo Wei Lu, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Tetsuya Miyazaki, Kaoru Higuma, Junichiro Ichikawa

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We propose and demonstrate an optical minimum-shift-keying (MSK) transmitter using a single-quad Mach-Zehnder (MZ) in-phase and quadrature modulator, where four sub-Mach-Zehnder modulators are monolithically integrated on a main MZ superstructure. Using the proposed transmitter, a MSK signal at bit rate of B could be successfully generated by orthogonally superposing two low-speed (B/2) carriersuppressed return-to-zero differential phase-shift-keying streams with a relative time offset, 1/B. MSK signals at bit rate of 20 and 80 Gbits/s were successfully generated using the proposed MSK transmitter. A continuous changed phase trajectory of the obtained MSK was confirmed using a complex spectrum analyzer. The filtering tolerance of the MSK was also characterized using a bandwidth-variable tunable filter.

Original languageEnglish
Pages (from-to)2144-2146
Number of pages3
JournalOptics Letters
Volume34
Issue number14
DOIs
Publication statusPublished - 2009 Jul 15
Externally publishedYes

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keying
quadratures
transmitters
modulators
shift
phase shift keying
tunable filters
low speed
analyzers
trajectories
bandwidth

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Optical minimum-shift-keying transmitter based on a monolithically integrated quad Mach-Zehnder in-phase and quadrature modulator. / Lu, Guo Wei; Sakamoto, Takahide; Chiba, Akito; Kawanishi, Tetsuya; Miyazaki, Tetsuya; Higuma, Kaoru; Ichikawa, Junichiro.

In: Optics Letters, Vol. 34, No. 14, 15.07.2009, p. 2144-2146.

Research output: Contribution to journalArticle

Lu, Guo Wei ; Sakamoto, Takahide ; Chiba, Akito ; Kawanishi, Tetsuya ; Miyazaki, Tetsuya ; Higuma, Kaoru ; Ichikawa, Junichiro. / Optical minimum-shift-keying transmitter based on a monolithically integrated quad Mach-Zehnder in-phase and quadrature modulator. In: Optics Letters. 2009 ; Vol. 34, No. 14. pp. 2144-2146.
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