Ken-ichi Kitayama

WDM mm-wave-band radio-on-fiber system using single supercontinuum light source in cooperation with photonic up-conversion

We propose to use a supercontinuum light source for WDM millimeter-wave-band radio-on-fiber (ROF) systems. 2-channel WDM 60-GHz-band ROF signals are generated and transmitted over 25-km standard single mode fiber using a photonic up-conversion technique.

Carrier frequency offset compensation for 10-Gbaud QPSK RoF transmission at 90 GHz with free-running optical LO signal

We demonstrate W-band (75–110 GHz) RoF radio signal transmission with two free-running lasers using an optical heterodyne technique. The combination of a laser located at a base station for the optical local oscillator and a data-modulated optical signal from a central office provides a W-band radio signal. The carrier frequency offset fluctuation within 6 MHz can be mitigated by digital signal processing at the receiver side, in a similar manner to that of optical digital coherent detection.

Mode and code division multiplexing system for asynchronous optical access network

Scalable and asynchronous optical mode and code division multiplexing system using mode and code MUX/DeMUX is proposed and experimentally demonstrated for future optical access network.

65km Transmission of Dispersion-Compensation-Free, Extended-Reach OCDMA-PON System with Passive Remote Node Using Single Multi-Port Encoder/Decoder

In an extended-reach OCDMA-PON system with passive remote node, 10-Gbps, 4-user, OCDMA transmission over 65-km standard SMF using a single multi-port encoder/decoder and 3R receiver for 10G-EPON systems without inline dispersion compensation is successfully demonstrated.