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    • 3. 发明授权
    • Semiconductor laser devices
    • 半导体激光器件
    • US4841536A
    • 1989-06-20
    • US850685
    • 1986-04-11
    • Aiko OhishiMotohisa HiraoNaoki ChinoneShinji TsujiHitoshi NakamuraHiroyoshi Matsumura
    • Aiko OhishiMotohisa HiraoNaoki ChinoneShinji TsujiHitoshi NakamuraHiroyoshi Matsumura
    • H01S5/227
    • H01S5/227H01S5/2275
    • This invention discloses a semiconductor laser capable of a high temperature and high output operation by forming a mesa stripe having an active layer in a reverse triangular mesa shape and forming thick semiconductor layers on both sides of the mesa stripe in such a manner that the resulting p-n junctions have a current blocking function. The invention discloses also a semiconductor laser wherein the formation of the p-n junctions described above is made before the formation of the reverse mesa stripe, and ion implantation is introduced in order to form the p-n junctions. Furthermore, the invention relates to transistors and semiconductor lasers using InGaAsP type quaternary compounds as the semiconductor. The quaternary compounds having a composition in which an energy band gap is from 1.2 to 1.4 eV are formed in a thickness of up to 1 .mu.m, and there can be thus obtained semiconductor devices having a small leakage current and being stable with time.
    • 本发明公开了一种能够通过形成具有反三角台面形状的有源层的台面条形状的高温高输出操作的半导体激光器,在台面条的两侧形成厚半导体层,使得所得到的pn 结点具有电流阻塞功能。 本发明还公开了一种半导体激光器,其中在形成反向台面条之前进行上述p-n结的形成,并且引入离子注入以形成p-n结。 此外,本发明涉及使用InGaAsP型四元化合物作为半导体的晶体管和半导体激光器。 形成其能带隙为1.2〜1.4eV的组成的四元化合物的厚度为1μm以下,可以得到漏电流小且时间稳定的半导体器件。
    • 9. 发明授权
    • Optical switch and optical add/drop multiplexer
    • 光开关和光分插复用器
    • US07343064B2
    • 2008-03-11
    • US11541783
    • 2006-10-02
    • Etsuo KoyamaHiroyoshi Matsumura
    • Etsuo KoyamaHiroyoshi Matsumura
    • G02B6/34G02B6/35G02F1/13
    • G02F1/133553G02F1/216G02F1/2955G02F2201/307G02F2203/055G02F2203/585
    • To provide a wavelength-selection optical switch able to select a light with a certain wavelength and an optical add/drop multiplexer using the same. An optical switch comprising: a silicon substrate; a glass substrate arranged to face a surface of the silicon substrate and having a transparent electrode layer in its opposing surface; a light diffraction reflection layer aligned on a surface of the silicon substrate; a liquid crystal layer aligned between the light diffraction reflection layer and the transparent electrode layer; a silicon substrate electrical terminal extracted from a rear surface of the silicon substrate; and a means for applying voltage between the transparent electrode layer and the silicon substrate electrical terminal; wherein selection of wavelength of light diffracted and reflected by the light diffraction reflection layer is possible by controlling the refraction index of the liquid crystal layer through the voltage. A beam diameter of a wavelength multiplexed light signal is widened by a collimator lens, the wavelength multiplexed light signal with widened beam diameter is directed to the optical switch, a light signal which has wavelength selected through the applied voltage on the optical switch is only diffracted and reflected by the optical switch.
    • 提供能够选择具有一定波长的光的波长选择光学开关和使用其的光学分插复用器。 一种光开关,包括:硅衬底; 玻璃基板,其布置成面对硅基板的表面并且在其相对表面中具有透明电极层; 在硅衬底的表面上对准的光衍射反射层; 在所述光衍射反射层和所述透明电极层之间排列的液晶层; 从硅衬底的后表面提取的硅衬底电端子; 以及用于在所述透明电极层和所述硅衬底电端子之间施加电压的装置; 其中通过控制液晶层的折射率通过该电压,可以选择由光衍射反射层衍射和反射的光的波长。 波长复用光信号的光束直径被准直透镜加宽,光束直径变宽的波长复用光信号被引导到光开关,通过光开关上的施加电压选择的波长的光信号仅被衍射 并由光开关反射。