Induced grating devices and method of making same

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	Induced grating devices and method of making same
其他题名	Induced grating devices and method of making same
	BYRON, KEVIN C.
	1988-12-27
专利权人	NORTHERN TELECOM LIMITED
公开日期	1988-12-27
授权国家	美国
专利类型	授权发明
摘要	It has been found that when a pulsed high-power laser beam is incident on the surfaces of a wide variety of materials, ripples are produced on such surface. This is due to interference between scattered waves and the incident beam producing intensity fringes, and hence localized heating. The dimensions of the ripples are dependent on the wavelngth of the incident light. This is used to produce permanent (after cooling) gratings on the outer surface of an optical waveguide, for example an optical fibre, on to which a laser beam is focussed by a lens system. Hence a grating whose length is a few hundreds of micrometers is produced. If the cladding is removed this effect of ripple generation is enhanced.
其他摘要	已经发现，当脉冲高功率激光束入射到各种材料的表面上时，在这样的表面上产生波纹。这是由于散射波与入射光束产生强度条纹之间的干扰，因此局部加热。涟漪的尺寸取决于入射光的波长。这用于在光波导（例如光纤）的外表面上产生永久（冷却后）光栅，激光束通过透镜系统聚焦在光波导上。因此，产生了长度为几百微米的光栅。如果去除包层，则增强了纹波产生的效果。
授权日期	1988-12-27
申请日期	1987-05-21
专利号	US4793680
专利状态	失效
申请号	US07/052284
公开（公告）号	US4793680
IPC 分类号	G02B5/18 \| G02B6/34
专利代理人	-
代理机构	LEE & SMITH
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/35864
专题	半导体激光器专利数据库
作者单位	NORTHERN TELECOM LIMITED
推荐引用方式 GB/T 7714	BYRON, KEVIN C.. Induced grating devices and method of making same. US4793680[P]. 1988-12-27.

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