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    • 6. 发明授权
    • Semiconductor laser device
    • 半导体激光器件
    • US06768755B2
    • 2004-07-27
    • US09746065
    • 2000-12-26
    • Daijiro InoueRyoji HiroyamaKunio TakeuchiYasuhiko NomuraMasayuki Hata
    • Daijiro InoueRyoji HiroyamaKunio TakeuchiYasuhiko NomuraMasayuki Hata
    • H01S500
    • H01S5/2231H01S5/06226H01S5/2206H01S5/2222H01S5/2226H01S5/2227
    • A depletion enhancement layer having a striped opening on the upper surface of a ridge portion, a low carrier concentration layer and an n-type current blocking layer are successively formed on a p-type cladding layer having the ridge portion. The low carrier concentration layer has a lower carrier concentration than the n-type current blocking layer. The band gap of the depletion enhancement layer is set to an intermediate level between the band gaps of the p-type cladding layer and the low carrier concentration layer. Alternatively, a first current blocking layer having a low carrier concentration and a second current blocking layer of the opposite conduction type are formed on an n-type depletion enhancement layer, and a p-type contact layer is formed on the second current blocking layer of the opposite conduction type and another p-type contact layer.
    • 在具有脊部的p型包覆层上依次形成具有在脊部上表面上的条纹开口的耗尽增强层,低载流子浓度层和n型电流阻挡层。 低载流子浓度层的载流子浓度比n型电流阻挡层低。 耗尽增强层的带隙被设定为p型覆层和低载流子浓度层的带隙之间的中间电平。 或者,在n型耗尽增强层上形成具有低载流子浓度的第一电流阻挡层和相反导电型的第二电流阻挡层,并且在第二电流阻挡层上形成p型接触层 相反的导电类型和另一个p型接触层。
    • 9. 发明授权
    • AlGaInP-based high-output red semiconductor laser device
    • 基于AlGaInP的高输出红色半导体激光器件
    • US06778575B2
    • 2004-08-17
    • US10100920
    • 2002-03-20
    • Ryoji HiroyamaDaijiro InoueYasuhiko NomuraKunio Takeuchi
    • Ryoji HiroyamaDaijiro InoueYasuhiko NomuraKunio Takeuchi
    • G01R2302
    • B82Y20/00H01S5/0218H01S5/162H01S5/34326H01S2301/18
    • A semiconductor laser device having a real refractive index guided structure capable of obtaining a high kink light output and a high maximum light output also when a vertical beam divergence angle is at a small level of at least 12.5° and not more than 20.0° is provided. This semiconductor laser device comprises an n-type cladding layer of AlGaInP formed on an n-type GaAs substrate, an active layer having an AlGaInP layer formed on the n-type cladding layer, a p-type cladding layer of AlGaInP formed on the active layer and a light confinement layer formed to partially cover the p-type cladding layer, and a vertical beam divergence angle is at least 12.5° and not more than 20.0°. Thus, a higher kink light output and a higher maximum light output can be obtained as compared with a conventional semiconductor laser device having a vertical beam divergence angle exceeding 20.0°.
    • 提供具有实际折射率引导结构的半导体激光器件,当垂直光束发散角处于至少12.5°且不大于20.0°的较小水平时,也可以获得高扭结光输出和高最大光输出 。 该半导体激光器件包括在n型GaAs衬底上形成的AlGaInP的n型包覆层,在n型覆层上形成有AlGaInP层的有源层,形成在活性层上的AlGaInP的p型包覆层 层和形成为部分地覆盖p型包层的光限制层,垂直光束发散角为至少12.5°且不大于20.0°。 因此,与具有超过20.0°的垂直光束发散角的常规半导体激光器件相比,可以获得更高的扭结光输出和更高的最大光输出。