Optical FSK/IM Signal Generation Using an Integrated Optical FSK Modulator

Abstract

Abstract:We demonstrate simultaneous optical modulation by frequency shift keying (FSK) and intensity modulation (IM) using a newly developed high-speed FSK modulator, for optical packet systems where payload and label signals are, respectively, in IM and FSK format. The modulator consists of four optical phase modulators, with travelingwave electrodes to obtain high-speed frequency switching and large frequency deviation in FSK modulation.

10Gbit/s FSK transmission over 95km SMF using a LiNbO3 modulator

“…Thus, FSK bit rate was limited by the response of the laser [3,4]. Recently, however, we reported high-speed optical frequency switching by using an optical FSK modulator consisting of a pair of Mach-Zehnder structures [5,6], which is based on optical single sideband (SSB) modulation technique [7]. In this paper, we demonstrate optical FSK transmission over a 95 km single-mode fiber (SMF) at 10 Gbit/s using a LiNbO 3 optical FSK modulator, where the FSK signal was demodulated by an optical interleaver.…”