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	Pump redundancy for optical amplifiers
	BERGANO, NEAL S.; DRUCKENMILLER, RICHARD F.; KERFOOT, III, FRANKLIN W.; TRISCHITTA, PATRICK R.
	1992-12-22
著作权人	CIENA CORPORATION
专利号	US5173957
国家	美国
文献子类	授权发明
其他题名	Pump redundancy for optical amplifiers
英文摘要	Currently laser diode pump redundancy for an optical fiber amplifier is obtained by selectively connecting one of two diode pumps to an optical amplifier via an optical switch. When the diode laser pump which is connected to the amplifier becomes defective, the optical switch is activated, either remotely or automatically, and the good laser diode is substituted for the defective laser diode pump. In another arrangement, two laser diodes are coupled to an optical fiber amplifier via a polarization-dependent optical coupler. In each instance, a second laser diode is required to provide pump redundancy for an optical fiber amplifier. In this invention, at least, two laser diodes are coupled via a 3 dB optical coupler to supply pump power to each of the two optical fiber amplifiers simultaneously. If one of the laser diode pumps fails, the other laser diode pump provides pump power to each of the optical fiber amplifiers. Thus, with the addition of a 3 dB coupler, pump redundancy for a pair of optical fiber amplifiers is obtained with only two laser diode pumps instead of the normally required four laser diode pumps. In practice, only one of the two pumps can be active, and the other turned on only when the first pump fails. In another embodiment, the two laser diode pumps can be active at all times where each laser diode pump is operated at either full or less than full power. In the arrangement where the laser diode pumps are operated simultaneously at less than full power, when a pump failure occurs the power output of the good laser diode pump can be increased to compensate for the loss of power from the defective pump.
公开日期	1992-12-22
申请日期	1991-09-12
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/36057]
专题	半导体激光器专利数据库
作者单位	CIENA CORPORATION
推荐引用方式 GB/T 7714	BERGANO, NEAL S.,DRUCKENMILLER, RICHARD F.,KERFOOT, III, FRANKLIN W.,et al. Pump redundancy for optical amplifiers. US5173957. 1992-12-22.

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