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    • 31. 发明申请
    • Semiconductor Laser Device and Semiconductor Laser Element Array
    • 半导体激光器件和半导体激光元件阵列
    • US20070230528A1
    • 2007-10-04
    • US11596249
    • 2005-06-23
    • Hirofumi MiyajimaAkiyoshi WatanabeHirofumi Kan
    • Hirofumi MiyajimaAkiyoshi WatanabeHirofumi Kan
    • H01S5/20
    • H01S5/22
    • The present invention relates to, for example, a semiconductor laser element capable of emitting laser beams having a small emitting angle efficiently with a simpler structure. The semiconductor laser element includes a first semiconductor portion, an active layer, and a second semiconductor portion. The first semiconductor portion has a ridge portion for forming a refractive index type waveguide region in the active layer. The waveguide region includes, at least, first and second portions having respective different total reflection critical angles at the side surfaces thereof The first and second portions are arranged in such a manner that the relative angle of the side surfaces thereof to a light emitting surface and a light reflecting surface that are positioned at either end of the active layer is greater than the total reflection critical angle at the side surfaces. In this case, the relative angle of the side surfaces in the first portion to the light emitting surface and light reflecting surface is different from the relative angle of the side surfaces in the second portion to the light emitting surface and light reflecting surface.
    • 本发明涉及例如能够以更简单的结构有效地发射具有小发射角的激光束的半导体激光元件。 半导体激光元件包括第一半导体部分,有源层和第二半导体部分。 第一半导体部分具有用于在有源层中形成折射率型波导区域的脊部分。 波导区域至少包括在其侧表面具有各自不同的全反射临界角的第一和第二部分。第一和第二部分被布置成使得其侧表面相对于发光表面的相对角度和 位于有源层的任一端的光反射表面大于侧表面处的全反射临界角。 在这种情况下,第一部分中的侧表面与发光表面和光反射表面的相对角度与第二部分中的侧表面相对于发光表面和光反射表面的相对角度不同。