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	Optical signal multiplexing/branching device
	KUROKAWA TAKASHI; KAWAGUCHI HITOSHI
	1989-05-26
著作权人	NIPPON TELEGR & TELEPH CORP
专利号	JP1989135087A
国家	日本
文献子类	发明申请
其他题名	Optical signal multiplexing/branching device
英文摘要	PURPOSE:To output a multiplexed optical signal for an optical input signal being asynchronous and having small duty ratio between channels by optically connecting in cascade a plurality of bistable semiconductor lasers at the respective channels, applying independent currents to the electrodes, and coupling radiated lights from the channels to one optical fiber. CONSTITUTION:When the timing of a control signal is set to a state that the pulse widths of I'1-I'4 are divided to 1/8 of one frame period and displaced by 1/4 period and the lights radiated from BLD 20 of the respective channels are coupled by a coupler 32 to an optical fiber FO, multiplexed optical signal is propagated in the fiber FO. That is, since a memory state is reset at each frame period by the currents I1-I4 and the input state of the optical signal is stored for one period at each channel, the multiplex is conducted by displacing the reading timing with the currents I'1-I'4, the optical input signals may be asynchronous, and the pulse width is not necessarily narrowed in advance.
公开日期	1989-05-26
申请日期	1987-11-20
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/63119]
专题	半导体激光器专利数据库
作者单位	NIPPON TELEGR & TELEPH CORP
推荐引用方式 GB/T 7714	KUROKAWA TAKASHI,KAWAGUCHI HITOSHI. Optical signal multiplexing/branching device. JP1989135087A. 1989-05-26.

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