External-cavity tunable wavelength light source using semiconductor laser having phase adjustment area

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	External-cavity tunable wavelength light source using semiconductor laser having phase adjustment area
其他题名	External-cavity tunable wavelength light source using semiconductor laser having phase adjustment area
	OHTATEME, HIROAKI; ENDOH, HIROAKI; GOTO, HIROSHI; IKEUCHI, KO; ASAI, AKIHIKO
	1996-11-26
专利权人	ANRITSU CORPORATION
公开日期	1996-11-26
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), an oscillation wavelength is tuned by simultaneously changing a current to be injected to the phase adjustment area of the LD and the rotation angle of a diffraction grating while holding the same external cavity longitudinal mode. A light beam emitted from the AR-coated end face of the LD having the phase adjustment area is collimated by a lens and incident on the diffraction grating. Only a light component having a specific wavelength selected upon spectral dispersion is reflected by the diffraction grating and returns to the LD. With this operation, an external cavity (effective cavity length K) is formed between the LD and the diffraction grating, thereby performing laser oscillation at a wavelength determined by an external cavity longitudinal mode and the cavity loss of the diffraction grating. The effective cavity length K can be changed in accordance with the current to be injected to the phase adjustment area. A current injection unit injects the current to the phase adjustment area. An oscillation wavelength control unit controls the injection current output from the current injection unit and the rotation angle of the diffraction grating.
其他摘要	在使用半导体激光器（LD）的外腔可调波长光源中，通过同时改变要注入LD的相位调整区域的电流和衍射光栅的旋转角度来调谐振荡波长。外腔纵模。从具有相位调整区域的LD的涂有AR的端面发射的光束被透镜准直并入射在衍射光栅上。只有在光谱色散时选择的具有特定波长的光分量被衍射光栅反射并返回到LD。通过该操作，在LD和衍射光栅之间形成外腔（有效腔长度K），从而在由外腔纵模和衍射光栅的腔损耗确定的波长下进行激光振荡。可以根据要注入相位调整区域的电流来改变有效腔长度K.电流注入单元将电流注入相位调整区域。振荡波长控制单元控制从电流注入单元输出的注入电流和衍射光栅的旋转角度。
授权日期	1996-11-26
申请日期	1995-06-05
专利号	US5579327
专利状态	失效
申请号	US08/465063
公开（公告）号	US5579327
IPC 分类号	H01S5/14 \| H01S5/00 \| H01S5/0625 \| 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/181661/42195
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	OHTATEME, HIROAKI,ENDOH, HIROAKI,GOTO, HIROSHI,et al. External-cavity tunable wavelength light source using semiconductor laser having phase adjustment area. US5579327[P]. 1996-11-26.

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