SIMULTANEOUS DEMULTIPLEXING AND CLOCK RECOVERY OF HIGH- SPEED OTDM SIGNAL USING TANDEM ELECTRO-ABSORPTION MODULATOR

摘要

PROBLEM TO BE SOLVED: To provide an optical receiver including a single integrated device capable of substantially simultaneously performing demultiplexing and clock recovery of high-speed OTDM signals in excess of 40 Gbps. SOLUTION: Simultaneous demultiplexing and clock recovery of high-speed (e.g. 80 Gbps or 160 Gbps) optical time division multiplex (OTDM) signals is achieved using a tandem electro-absorption modulator (TEAM). The TEAM has a monolithically integrated SOA (Semiconductor Optical Amplifier) to compensate the insertion loss and two EAMs to reduce the switching window. The demultiplexing and clock recovery may be performed by a single TEAM, or by two or more TEAMs. A fiber Raman amplifier may be used to boost the intensity of the OTDM signals during transmission.