Tunable wavelength light source incorporated optical filter using interferometer into external cavity

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	Tunable wavelength light source incorporated optical filter using interferometer into external cavity
其他题名	Tunable wavelength light source incorporated optical filter using interferometer into external cavity
	GOTO, HIROSHI
	1995-08-22
专利权人	ANRITSU CORPORATION
公开日期	1995-08-22
授权国家	美国
专利类型	授权发明
摘要	In an external-cavity tunable wavelength light source using a semiconductor laser (LD), when an interferometer serving as an optical filter is constituted by part of an external cavity, an external-cavity longitudinal mode can be selected with good reproducibility, and a side mode suppression ratio can be increased. A light beam emitted from an AR-coated facet of an LD is converted into a collimated beam by a lens, and the collimated beam is incident on a Mach-Zehnder (MZ) interferometer serving as an optical filter. An interference light beam emerges from the MZ interferometer toward a diffraction grating. Only a light component having a specific wavelength and selected by spectrally dispersing the interference light beam reversely travels in the same optical path as that of the interference light beam and is returned to the LD. In this manner, a cavity is formed between the LD and the diffraction grating, and a laser beam having a wavelength determined by three relationships between an external-cavity longitudinal mode, a cavity loss caused by the diffraction grating, and the output characteristics of an interference light beam from the MZ interferometer is oscillated.
其他摘要	在使用半导体激光器（LD）的外腔可调波长光源中，当用作光学滤波器的干涉仪由外腔的一部分构成时，可以选择具有良好再现性的外腔纵模和侧面模式抑制比可以增加。从LD的AR涂层面发射的光束通过透镜转换成准直光束，并且准直光束入射在用作光学滤波器的Mach-Zehnder（MZ）干涉仪上。干涉光束从MZ干涉仪射向衍射光栅。只有具有特定波长并通过光谱分散干涉光束而选择的光分量在与干涉光束相同的光路中反向行进并返回到LD。以这种方式，在LD和衍射光栅之间形成空腔，并且激光束具有由外腔纵模，由衍射光栅引起的腔损失和输出特性之间的三个关系确定的波长。来自MZ干涉仪的干涉光束振荡。
授权日期	1995-08-22
申请日期	1994-08-25
专利号	US5444724
专利状态	失效
申请号	US08/296358
公开（公告）号	US5444724
IPC 分类号	H01S3/106 \| H01S5/14 \| H01S5/00 \| H01S5/062 \| H01S5/0687 \| H01S3/08 \| H01S3/1055 \| H01S3/10
专利代理人	-
代理机构	FRISHAUF,HOLTZ,GOODMAN,LANGER & CHICK
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/42146
专题	半导体激光器专利数据库
作者单位	ANRITSU CORPORATION
推荐引用方式 GB/T 7714	GOTO, HIROSHI. Tunable wavelength light source incorporated optical filter using interferometer into external cavity. US5444724[P]. 1995-08-22.

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