公开(公告)号：US4923271A

公开(公告)日：1990-05-08

申请号：US329468

申请日：1989-03-28

申请人： Charles H. Henry ,  Rudolf F. Kazarinov ,  Rodney C. Kistler ,  Kenneth J. Orlowsky ,  Yosi Shani ,  Aasmund S. Sudbo

发明人： Charles H. Henry ,  Rudolf F. Kazarinov ,  Rodney C. Kistler ,  Kenneth J. Orlowsky ,  Yosi Shani ,  Aasmund S. Sudbo

IPC分类号： G02B6/12 ,  G02B5/28 ,  G02B6/293 ,  G02B6/34

CPC分类号： G02B6/29328 ,  G02B6/29329 ,  G02B6/2938

摘要： An optical device is disclosed which provides wavelength multiplexing/demultiplexing utilizing a plurality of focusing Bragg reflectors. Each Bragg reflector includes a plurality of confocal (i.e., common foci) elliptical grating lines, with the exit/entrance ports of the input/output waveguides located at the foci of the ellipse. By virtue of the elliptical design, the signal propagating outward from the exit port of the input waveguide will be reflected by the appropriate Bragg reflector and focused into the entrance port of the appropriate output waveguide. When each Bragg reflector exhibits a different ellipticity, but shares one common focal point, optical multiplexing/demultiplexing may be achieved. Optical filtering may be achieved when all Bragg reflectors are designed to have common foci.

公开(公告)号：US5115294A

公开(公告)日：1992-05-19

申请号：US746308

申请日：1991-08-14

申请人： Aasmund S. Sudbo ,  Won-Tien Tsang ,  Long Yang

发明人： Aasmund S. Sudbo ,  Won-Tien Tsang ,  Long Yang

IPC分类号： H01L27/144 ,  H01L31/0304 ,  H01L31/108

CPC分类号： H01L31/03046 ,  H01L27/1443 ,  H01L31/1085 ,  H01L2924/0002 ,  Y02E10/544

摘要： A new MSM photodetector, including a photoabsorbing layer of ternary or quaternary III-V compound semiconductor material, is disclosed. This new photodetector is significant because it exhibits a relatively small dark current and a correspondingly large signal-to-noise ratio. Moreover, the photodetector is readily integrable with electronic integrated circuits and is relatively easy to fabricate.

摘要翻译： 公开了一种新的MSM光电探测器，其包括三元或四元III-V族化合物半导体材料的光吸收层。 这种新的光电探测器是显着的，因为它具有相对较小的暗电流和相当大的信噪比。 此外，光检测器易于与电子集成电路集成，并且相对容易制造。