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    • 73. 发明申请
    • SEMICONDUCTOR OPTICAL ELEMENT AND EXTERNAL CAVITY LASER HAVING THE SEMICONDUCTOR OPTICAL ELEMENT
    • 具有半导体光学元件的半导体光学元件和外部光圈激光
    • US20090225801A1
    • 2009-09-10
    • US12067601
    • 2006-09-27
    • Hiroshi MoriAtsushi YamadaTakahiro Samejima
    • Hiroshi MoriAtsushi YamadaTakahiro Samejima
    • H01S3/13G02B6/12
    • H01S5/227H01L33/0045H01S5/02284H01S5/101H01S5/1014H01S5/1032H01S5/1085H01S5/14H01S5/141H01S5/142H01S5/143H01S5/146
    • The present invention provides a semiconductor optical element applicable to an EC-LD or an SLD, and an external cavity laser having the semiconductor optical element. The semiconductor optical element has a pair of cleavage surfaces, and comprises a semiconductor substrate 11 having a base surface and a planer structure provided on the base surface and provided with a waveguide 1G having an active layer. The waveguide 1G has an end surface with low reflectivity and another end surface with certain reflectivity. The waveguide 1G includes an end portion having a first optical axis in the vicinity of the first end surface 1TL and an end portion having a second optical axis in the vicinity of the second end surface 1TH, the first optical axis being inclined at a first angle ΦL other than zero degree with respect to a normal to the first end surface 1TL, the second optical axis being inclined at a second angle ΦH other than zero degree with respect to a normal to the second end surface 1TH, the first angle ΦL being different from the second angle ΦH. The end portion of the waveguide 1G is different in width from the other end portion of the waveguide 1G.
    • 本发明提供一种适用于EC-LD或SLD的半导体光学元件和具有该半导体光学元件的外部空腔激光器。 半导体光学元件具有一对解理面,并且包括具有基面的半导体基板11和设置在基面上的平面结构,并设置有具有有源层的波导管1G。 波导1G具有低反射率的端面和具有一定反射率的另一端面。 波导管1G包括在第一端面1TL附近具有第一光轴的端部和在第二端面1TH附近具有第二光轴的端部,第一光轴以第一角度倾斜 PhiL相对于第一端面1TL的法线为零度以外,第二光轴相对于第二端面1TH的法线倾斜成零度以外的第二角度PhiH,第一角度PhiL不同 从第二角度PhiH。 波导1G的端部宽度与波导管1G的另一端部不同。
    • 79. 发明授权
    • Semiconductor laser
    • 半导体激光器
    • US07301979B2
    • 2007-11-27
    • US10825407
    • 2004-04-14
    • Keiji ItoIsao KidoguchiToru TakayamaOsamu Imafuji
    • Keiji ItoIsao KidoguchiToru TakayamaOsamu Imafuji
    • H01S5/00
    • B82Y20/00H01S5/028H01S5/0655H01S5/1014H01S5/2214H01S5/2231H01S5/34333H01S2301/18H01S2304/04
    • A semiconductor laser device of the present invention includes: a first conductivity type cladding layer; an active layer; and a second conductivity type cladding layer, which are on a substrate. The semiconductor laser device further includes a stripe structure for injecting carriers therein. A width of the stripe is wider at a front end face of a resonator from which laser light is emitted than at a rear end face that is located on an opposite side of the front end face, and a reflectance of the front end face is lower than a reflectance of the rear end face. With this configuration, the injection of carriers into an active layer can be controlled in accordance with an optical intensity distribution along the resonator direction within the semiconductor laser, thus achieving a decrease in threshold current, an enhancement of a slope efficiency and an enhancement of a kink level. As a result, the semiconductor laser device can be provided so that stable laser oscillation in the fundamental transverse mode can be realized up to the time of a high optical output operation.
    • 本发明的半导体激光器件包括:第一导电型包覆层; 活性层 和第二导电型包覆层。 半导体激光装置还包括用于在其中注入载体的条纹结构。 在发射激光的谐振器的前端面上的宽度比位于前端面相对侧的后端面宽,并且前端面的反射率较低 比后端面的反射率高。 利用这种配置,可以根据沿着半导体激光器内的谐振器方向的光强度分布来控制载流子进入有源层,从而实现阈值电流的降低,斜率效率的提高和 扭结水平 结果,可以提供半导体激光器件,使得可以在高光输出操作时实现在基本横向模式下的稳定的激光振荡。