Optical minimum-shift keying with external modulation scheme

Takahide Sakamoto*, Tetsuya Kawanishi, Masayuki Izutsu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


We propose an optical initial phase control technique for external modulation in the format of minimum-shift keying (MSK). In this scheme, the optical phase discontinuities inherent to external frequency-shift-keying (FSK) modulation are compensated by use of an initial phase controller in conjunction with a FSK modulator. We present the principle of the control method and then numerically and experimentally prove that the signal has a modulation spectrum more compact than that of conventional binary phase-shift keying. 10-Gbit/s external modulation in MSK format was experimentally demonstrated.

Original languageEnglish
Pages (from-to)7741-7747
Number of pages7
JournalOptics Express
Issue number20
Publication statusPublished - 2005 Oct 3
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Optical minimum-shift keying with external modulation scheme'. Together they form a unique fingerprint.

Cite this