SEMICONDUCTOR LASER MODULE, FIBER TYPE OPTICAL AMPLIFIER, OPTICAL REPEATER, AND OPTICAL TRANSMISSION SYSTEM

摘要

PPROBLEM TO BE SOLVED: To enable high speed and large capacity communication in an optical transmission system of a cable feeding system. PSOLUTION: Six semiconductor laser modules 21 in total are arranged in a fiber type optical amplifier 31, with three modules connected in serial and two modules connected in parallel, wherein each module includes a semiconductor laser element which has a multimode interference wave guiding path and can provide an optical output of 300 mW or higher with a drive voltage of 1.5 V or less. The semiconductor laser module 21 is connected to a semiconductor laser module drive circuit 22, an optical fiber 8 is connected to a multiplexer 23 and an optical fiber 24 is extended to the outside from the multiplexer 23. This fiber type optical amplifier 31 is connected with a power feeding wire, a multiplexer and an optical fiber to form an optical repeater. Between a pair of transceivers, a plurality of optical repeaters are arranged an are connected with each other by cables to form an optical transmission system. In each cable, the power feeding wire and optical fiber are accommodated. PCOPYRIGHT: (C)2003,JPO