Multiple-wavelength light source and method of controlling oscillation frequencies thereof

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	Multiple-wavelength light source and method of controlling oscillation frequencies thereof
其他题名	Multiple-wavelength light source and method of controlling oscillation frequencies thereof
	KOMATSU, KEIRO, C/O NEC CORPORATION
	2000-06-07
专利权人	NEC ELECTRONICS CORPORATION
公开日期	2000-06-07
授权国家	欧洲专利局
专利类型	发明申请
摘要	A multiple-wavelength light source has a plurality of semiconductor laser devices, a plurality of optical waveguides for leading laser beams from the semiconductor laser devices to respective desired paths, and a plurality of diffraction gratings as external cavities for the semiconductor laser devices. The multiple-wavelength light source can output laser beams of respective wavelengths determined by structural details of the diffraction gratings. The multiple-wavelength light source also has an optical combiner for multiplexing the laser beams from the semiconductor laser devices into a laser beam, an optical wavelength multiplexer/demultiplexer for demultiplexing the laser beam from the optical combiner into a plurality of laser beams of respective desired wavelengths, and outputting the laser beams, a plurality of photodetectors for detecting the laser beams from the optical wavelength multiplexer/demultiplexer and outputting voltages depending on respective detected laser beam power levels, a plurality of heaters disposed near the diffraction gratings for varying temperatures of the diffraction gratings, and a heater current control circuit for supplying currents to the heaters for maximizing the output voltages from the photodetectors. Oscillation wavelengths can be finely adjusted to increase the yield of fabricated devices.
其他摘要	多波长光源具有多个半导体激光器件，多个光波导，用于将来自半导体激光器件的激光束引导到各自的所需路径，以及多个衍射光栅作为半导体激光器件的外腔。多波长光源可以输出由衍射光栅的结构细节确定的各个波长的激光束。多波长光源还具有用于将来自半导体激光器件的激光束多路复用成激光束的光学组合器，用于将来自光学组合器的激光束多路分解成各自所需的多个激光束的光学波长多路复用器/多路分离器。波长和输出激光束，多个光电探测器，用于检测来自光学波长多路复用器/多路分离器的激光束，并根据各自检测的激光束功率电平输出电压，多个加热器设置在衍射光栅附近，用于改变温度的变化。衍射光栅和加热器电流控制电路，用于向加热器提供电流，以使来自光电探测器的输出电压最大化。可以精细地调节振荡波长以增加制造的器件的产量。
主权项	A multiple-wavelength light source comprising: a plurality of semiconductor laser devices; a plurality of optical waveguides for leading laser beams emitted from said semiconductor laser devices to respective desired paths; a plurality of diffraction gratings disposed in said optical waveguides, respectively, and serving as external cavities for said semiconductor laser devices, whereby laser beams having respective wavelengths determined by structural details of said diffraction gratings can be output; an optical combiner for multiplexing the laser beams emitted from said semiconductor laser devices into a laser beam; an optical wavelength multiplexer/demultiplexer for demultiplexing the laser beam from the optical combiner into a plurality of laser beams having respective desired wavelengths, and outputting the laser beams; a photodetector for detecting the laser beams from said optical wavelength multiplexer/demultiplexer and outputting voltages depending on respective detected power levels of the laser beams; a plurality of heaters disposed near said diffraction gratings, respectively, for varying temperatures of said diffraction gratings; and a heater current control circuit for supplying currents to said heaters, respectively, for maximizing the output voltages from said photodetectors.
申请日期	1999-12-02
专利号	EP1006683A2
专利状态	失效
申请号	EP1999124142
公开（公告）号	EP1006683A2
IPC 分类号	G02B6/12 \| G02B5/18 \| G02B6/293 \| H01S5/00 \| H01S5/10 \| H01S5/14 \| H01S5/40 \| H04B10/145
专利代理人	-
代理机构	GLAWE, DELFS, MOLL & PARTNER
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/64756
专题	半导体激光器专利数据库
作者单位	NEC ELECTRONICS CORPORATION
推荐引用方式 GB/T 7714	KOMATSU, KEIRO, C/O NEC CORPORATION. Multiple-wavelength light source and method of controlling oscillation frequencies thereof. EP1006683A2[P]. 2000-06-07.

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