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    • 1. 发明授权
    • Traveling wave optical modular
    • 行波光模块
    • US06831767B2
    • 2004-12-14
    • US10459472
    • 2003-06-12
    • Junji ShigetaMasataka ShiraiShinji TsujiHideo Arimoto
    • Junji ShigetaMasataka ShiraiShinji TsujiHideo Arimoto
    • G02F101
    • B82Y20/00G02F1/01708G02F1/0356G02F2001/0157G02F2201/127
    • An optical modulator having a good reflection characteristic over a broad band is provided, with a small semiconductor chip area, by use of a semiconductor chip on which a semiconductor optical modulator is mounted. A typical example of the optical modulator has a structure in which a semiconductor chip provided with an electro-absorption semiconductor optical modulator comprising an electrode of traveling wave modulator is mounted on a dielectric substrate provided with a transmission line, and the characteristic impedance of at least a part of the transmission line is set to be greater than the output impedance of a modulator driver circuit and the impedance of an optical modulator portion. By this, a broad band optical modulator with excellent reflection characteristic can be provided by use of a semiconductor chip which is small in area.
    • 通过使用其上安装有半导体光调制器的半导体芯片,提供了在宽带上具有良好反射特性的光调制器,具有小的半导体芯片面积。 光调制器的典型实例具有这样的结构,其中设置有包括行波调制器电极的电吸收半导体光调制器的半导体芯片安装在设置有传输线的电介质基板上,并且至少具有特征阻抗 传输线的一部分被设置为大于调制器驱动器电路的输出阻抗和光调制器部分的阻抗。 由此,可以通过使用面积小的半导体芯片来提供具有优异反射特性的宽带光调制器。
    • 5. 发明授权
    • Semiconductor photodetector and optical transmitting device
    • 半导体光电检测器和光发射装置
    • US06822271B2
    • 2004-11-23
    • US09485852
    • 2000-02-17
    • Toshiyuki MogiKazumi KawamotoShinji TsujiHitoshi NakamuraMasato ShishikuraSatoru Kikuchi
    • Toshiyuki MogiKazumi KawamotoShinji TsujiHitoshi NakamuraMasato ShishikuraSatoru Kikuchi
    • H01L2980
    • G02B6/4224
    • In aiming at cost lowering of an optical module and an optical transmission apparatus and with the objective of providing a semiconductor light receiving element that has a good coherence with the other edge emitting/incidence type optical devices and is capable of performing the positioning easily and with a high accuracy, in the edge emitting/incidence type light receiving element in which the light absorbing layer 19 has been formed, the space region is formed so as to provide at least 100 &mgr;m2 of the marker detecting region 24, thereby facilitating detection of marker 23 on the optical device 26 and executing the positioning of the light receiving element with a high accuracy, the space region resulting from eliminating a part of the light absorbing layer 19 that absorbs the detection light of the light receiving element, the transmission amount of the detection light toward the marker detecting region that is parallel to a primary plane being equal to 30% or higher, the detection light having penetrated and transmitted the primary plane of the light receiving element.
    • 为了降低光学模块和光学传输装置的成本,并且为了提供与其它边缘发射/入射型光学装置具有良好相干性的半导体光接收元件,并且能够容易地执行定位 在其中形成有光吸收层19的边缘发射/入射型光接收元件中形成高精度,形成空间区域,以便提供标记检测区域24的至少100微米2,从而便于 检测光学装置26上的标记23,并且以高精度执行光接收元件的定位,由消除吸收光接收元件的检测光的光吸收层19的一部分而产生的空间区域,透射 检测光朝着与主平面平行的标记检测区域的检测光量等于30%以上 n光穿过并透射光接收元件的主平面。