title: Optical minimum-shift keying with external modulation scheme.
abstract: 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 frequencyshift- 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.
authors.forename: Takahide
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Kawanishi
authors.forename: Masayuki
authors.initials: M
authors.lastname: Izutsu