Optical amplifier

OPT OpenIR > 半导体激光器专利数据库

	Optical amplifier
其他题名	Optical amplifier
	VERBEEK, BASTIAAN HENDRIK; VAN ES-SPIEKMAN, WILMA; HENDRIX, LEONARDUS JOANNES MARIA
	1991-05-08
专利权人	PHILIPS ELECTRONICS N.V.
公开日期	1991-05-08
授权国家	欧洲专利局
专利类型	发明申请
摘要	An optical amplifier with a semiconductor body comprising a layer structure grown on a substrate 1 with an active layer 4 situated between two cladding layers (2, 3) with a strip-shaped amplification region bounded by two end surfaces (7, 8) which form the input and output surfaces of the radiation to be amplified. The active layer comprises a number of quantum well (QW) layers 4A with direct band transition, which are separated by barrier layers 4B of a different semiconductor material. According to the invention, the material, the number, and the thickness of the QW layers 4A and the barrier layers 4B in combination with the length l of the amplification region are chosen in such a way that two optical transitions can take place in the active layer 4, maximum amplification occurring at a certain current density through the PN junction for the radiation wavelengths corresponding to these optical transitions, while the end surfaces (7, 8) are provided with an anti-reflection layer 9 which has a reflection coefficient R of at most 0,5% for these two wavelengths. An anti-reflection layer made up of four layers of alternately titanium oxide and aluminium oxide is advantageously used.
其他摘要	一种具有半导体本体的光学放大器，包括在衬底1上生长的层结构，其中有源层4位于两个包层（2,3）之间，带状的放大区域由两个端面（7,8）界定，形成两个端面（7,8）待放大的辐射的输入和输出表面。有源层包括多个具有直接带转变的量子阱（QW）层4A，其由不同半导体材料的阻挡层4B分开。根据本发明，选择QW层4A和阻挡层4B的材料，数量和厚度以及放大区域的长度l，使得在活动中可以发生两个光学转变。第4层，对应于这些光学跃迁的辐射波长，通过PN结以特定电流密度发生最大放大，而端面（7,8）设有抗反射层9，其反射系数R为这两个波长最多为0.5％。有利地使用由四层交替的氧化钛和氧化铝构成的抗反射层。
申请日期	1990-10-24
专利号	EP0426239A1
专利状态	失效
申请号	EP1990202835
公开（公告）号	EP0426239A1
IPC 分类号	G02B6/12 \| G02F1/35 \| H01S5/00 \| H01S5/028 \| H01S5/227 \| H01S5/34 \| H01S5/343 \| H01S5/50 \| H01S3/025 \| H01S3/19 \| H01S3/25
专利代理人	-
代理机构	SMEETS, EUGENIUS THEODORUS J. M.
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/87073
专题	半导体激光器专利数据库
作者单位	PHILIPS ELECTRONICS N.V.
推荐引用方式 GB/T 7714	VERBEEK, BASTIAAN HENDRIK,VAN ES-SPIEKMAN, WILMA,HENDRIX, LEONARDUS JOANNES MARIA. Optical amplifier. EP0426239A1[P]. 1991-05-08.