公开(公告)号：DE69113471D1

公开(公告)日：1995-11-02

申请号：DE69113471

申请日：1991-12-05

Applicant: IBM

Inventor： GFELLER FRITZ DR ,  JAECKEL HEINZ DR ,  MEIER HEINZ DR

IPC: H01S5/00 ,  H01S5/16 ,  H01S5/30 ,  H01S3/085

公开(公告)号：DE69112058D1

公开(公告)日：1995-09-14

申请号：DE69112058

申请日：1991-09-19

Applicant: IBM

Inventor： BONA GIAN-LUCA DR ,  GFELLER FRITZ DR ,  JAECKEL HEINZ DR ,  WEBB DAVID J DR

IPC: G02B6/12 ,  G02B6/42 ,  H01S3/025

Abstract: Disclosed is a method for efficient and self-aligned laser to waveguide coupling being an important step towards higher integration of opto-electronic circuits. For automatic alignment of an optical waveguide (67 - 69) to a ridge waveguide laser (50 - 52), the ridge structure (54) of the laser is transferred into the substrate (50) by etching the mirror groove. The transferred ridge structure (55) serves as base for the deposition of the waveguide layers (67 -69), their thickness being controlled during the deposition such that the waveguide core (69) is laterally and vertically aligned to the lasing active layer (51) of the laser structure (50 - 52).

公开(公告)号：CH618820A5

公开(公告)日：1980-08-15

申请号：CH1175777

申请日：1977-09-27

Applicant: IBM

Inventor： WILD DANIEL ,  GFELLER FRITZ DR

IPC: H01Q19/06 ,  H04B7/15 ,  H04B10/11 ,  H04B10/118 ,  H04B9/00

Abstract: In a satellite communication system using optical carriers the down link radiation beam pattern is limited to illuminating only the receiver sites for power economy. The transmitting laser's beam pattern is shaped in such a way that the intensity distribution at the earth surface is adapted to the geographical distribution of the receiving stations. A suitably prepared hologram or set of stacked holograms storing different beam patterns is interposed in the radiation path. The antenna characteristic may be varied by selecting a particular hologram. This is accomplished by changing the beam angle of incidence by remote control.