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    • 1. 发明公开
    • Semiconductor laser device for use as a pumping light source
    • Halbleiterlaservorrichtung zur Verwendung als Pumplichtquelle
    • EP1202407A3
    • 2003-12-03
    • EP01114717.0
    • 2001-06-21
    • THE FURUKAWA ELECTRIC CO., LTD.
    • Tsukiji, NaokiYoshida, JunjiFunabashi, Masaki
    • H01S5/12H01S3/30
    • H01S5/227H01S3/094003H01S3/302H01S5/02415H01S5/02438H01S5/0287H01S5/1212H01S5/1215H01S5/1225
    • A semiconductor laser device, module, and method for providing light suitable for providing an excitation light source for a Raman amplifier. The semiconductor laser device includes an active layer configured to radiate light, a spacer layer in contact with the active layer and a diffraction grating formed within the spacer layer, and configured to emit a light beam having a plurality of longitudinal modes within a predetermined spectral width of an oscillation wavelength spectrum of the semiconductor device. A plurality of longitudinal modes within a predetermined spectral width of an oscillation wavelength spectrum is provided by changing a wavelength interval between the longitudinal modes and/or widening the predetermined spectral width of the oscillation wavelength spectrum. The wavelength interval is set by the length of a resonator cavity within the semiconductor laser device, while the predetermined spectral width of the oscillation wavelength spectrum is set by either shortening the diffraction grating or varying a pitch of the grating elements within the diffraction grating.
    • 一种用于提供适于为拉曼放大器提供激发光源的光的半导体激光器件,模块和方法。 半导体激光器件包括被配置为辐射光的有源层,与有源层接触的间隔层和形成在间隔层内的衍射光栅,并且被配置为发射具有预定光谱宽度内的多个纵向模式的光束 的半导体器件的振荡波长谱。 通过改变纵向模式之间的波长间隔和/或加宽振荡波长频谱的预定频谱宽度来提供在振荡波长频谱的预定频谱宽度内的多个纵向模式。 波长间隔由半导体激光器件内的谐振器腔的长度设定,而通过缩短衍射光栅或改变衍射光栅内的光栅元件的间距来设定振荡波长光谱的预定光谱宽度。
    • 2. 发明公开
    • Semiconductor laser device having a diffraction grating on a light emission side
    • 在发光侧具有衍射光栅的半导体激光装置
    • EP1255336A2
    • 2002-11-06
    • EP01129378.4
    • 2001-12-18
    • THE FURUKAWA ELECTRIC CO., LTD.
    • Yoshida, JunjiTsukiji, NaokiFunabashi, Masaki
    • H01S5/125H01S5/10H01S5/14H04B10/14
    • H01S5/125H01S3/094003H01S3/09415H01S5/1021H01S5/1039H01S5/1212H01S5/1215H01S5/141H01S5/146
    • A semiconductor device and method for providing a light source suitable for use as a pumping light source in a Raman amplification system are provided. The device upon which the method is based includes an active layer configured to radiate light; a light reflecting facet positioned on a first side of the active layer; a light emitting facet positioned on a second side of the active layer thereby forming a resonant cavity between the light reflecting facet and the light emitting facet; and a partial diffraction grating having a predetermined length and positioned on a light emission side of the resonator. The predetermined length of the partial diffraction grating is selected such that the semiconductor device emits a light beam having a plurality of longitudinal modes within a predetermined spectral width of an oscillation wavelength spectrum of the semiconductor device. The predetermined length of the partial diffraction grating may be set in relation to a length of the resonant cavity, or in relation to a coupling coefficient κi of the partial diffraction grating.
    • 提供了一种用于提供适合用作拉曼放大系统中的泵浦光源的光源的半导体器件和方法。 该方法所基于的装置包括被配置为发射光的有源层; 位于有源层的第一侧上的光反射小面; 位于所述有源层的第二侧上的发光小平面,从而在所述光反射小面和所述发光小平面之间形成谐振腔; 以及具有预定长度并位于谐振器的光发射侧的部分衍射光栅。 部分衍射光栅的预定长度被选择为使得半导体器件发射具有在半导体器件的振荡波长谱的预定谱宽内的多个纵向模式的光束。 部分衍射光栅的预定长度可以相对于谐振腔的长度或与部分衍射光栅的耦合系数κi相关地设定。