Cross-talk free, low-noise optical amplifier

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	Cross-talk free, low-noise optical amplifier
其他题名	Cross-talk free, low-noise optical amplifier
	DIJAILI, SOL P.; PATTERSON, FRANK G.; DERI, ROBERT J.
	1995-07-25
专利权人	LAWRENCE LIVERMORE NATIONAL SECURITY LLC
公开日期	1995-07-25
授权国家	美国
专利类型	授权发明
摘要	A low-noise optical amplifier solves crosstalk problems in optical amplifiers by using an optical cavity oriented off-axis (e.g. perpendicular) to the direction of a signal amplified by the gain medium of the optical amplifier. Several devices are used to suppress parasitic lasing of these types of structures. The parasitic lasing causes the gain of these structures to be practically unusable. The lasing cavity is operated above threshold and the gain of the laser is clamped to overcome the losses of the cavity. Any increase in pumping causes the lasing power to increase. The clamping action of the gain greatly reduces crosstalk due to gain saturation for the amplified signal beam. It also reduces other nonlinearities associated with the gain medium such as four-wave mixing induced crosstalk. This clamping action can occur for a bandwidth defined by the speed of the laser cavity. The lasing field also reduces the response time of the gain medium. By having the lasing field off-axis, no special coatings are needed. Other advantages are that the lasing field is easily separated from the amplified signal and the carrier grating fluctuations induced by four-wave mixing are decreased. Two related methods reduce the amplified spontaneous emission power without sacrificing the gain of the optical amplifier.
其他摘要	低噪声光放大器通过使用与光放大器的增益介质放大的信号的方向离轴（例如垂直）定向的光腔来解决光放大器中的串扰问题。几种器件用于抑制这些类型结构的寄生激光。寄生激光使得这些结构的增益实际上不可用。激光腔在阈值以上操作，并且激光器的增益被钳位以克服腔的损失。泵送的任何增加都会导致激光功率增加。增益的钳位作用大大降低了由于放大信号光束的增益饱和引起的串扰。它还减少了与增益介质相关的其他非线性，例如四波混频引起的串扰。对于由激光腔速度限定的带宽，可以发生这种钳位动作。激光场也减少了增益介质的响应时间。通过使激光场离轴，不需要特殊的涂层。其他优点是激光场容易与放大信号分离，并且由四波混频引起的载波光栅波动减小。两种相关方法在不牺牲光放大器增益的情况下降低了放大的自发发射功率。
申请日期	1994-06-14
专利号	US5436759
专利状态	失效
申请号	US08/260275
公开（公告）号	US5436759
IPC 分类号	H01S3/23 \| H01S5/50 \| H01S5/00 \| H01S5/10 \| H01S3/18
专利代理人	-
代理机构	SARTORIO, HENRY P. WOOLDRIDGE, JOHN P.
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/47325
专题	半导体激光器专利数据库
作者单位	LAWRENCE LIVERMORE NATIONAL SECURITY LLC
推荐引用方式 GB/T 7714	DIJAILI, SOL P.,PATTERSON, FRANK G.,DERI, ROBERT J.. Cross-talk free, low-noise optical amplifier. US5436759[P]. 1995-07-25.

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