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Title: Integrated optical XY coupler

Abstract

An integrated optical XY coupler having two converging input waveguide arms meeting in a central section and a central output waveguide arm and two diverging flanking output waveguide arms emanating from the central section. In-phase light from the input arms constructively interferes in the central section to produce a single mode output in the central output arm with the rest of the light being collected in the flanking output arms. Crosstalk between devices on a substrate is minimized by this collection of the out-of-phase light by the flanking output arms of the XY coupler. 9 figs.

Inventors:
;
Publication Date:
Research Org.:
AT&T Corporation
OSTI Identifier:
504955
Patent Number(s):
US 5,627,929/A/
Application Number:
PAN: 8-435,023
Assignee:
Sandia Corp., Albuquerque, NM (United States) SNL; SCA: 420000; PA: EDB-97:099929; SN: 97001815588
DOE Contract Number:
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 6 May 1997
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; OPTICAL EQUIPMENT; WAVEGUIDES; LIGHT TRANSMISSION; DESIGN; INTERFERENCE; SUBSTRATES

Citation Formats

Vawter, G.A., and Hadley, G.R. Integrated optical XY coupler. United States: N. p., 1997. Web.
Vawter, G.A., & Hadley, G.R. Integrated optical XY coupler. United States.
Vawter, G.A., and Hadley, G.R. 1997. "Integrated optical XY coupler". United States. doi:.
@article{osti_504955,
title = {Integrated optical XY coupler},
author = {Vawter, G.A. and Hadley, G.R.},
abstractNote = {An integrated optical XY coupler having two converging input waveguide arms meeting in a central section and a central output waveguide arm and two diverging flanking output waveguide arms emanating from the central section. In-phase light from the input arms constructively interferes in the central section to produce a single mode output in the central output arm with the rest of the light being collected in the flanking output arms. Crosstalk between devices on a substrate is minimized by this collection of the out-of-phase light by the flanking output arms of the XY coupler. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1997,
month = 5
}
  • An integrated optical XY coupler having two converging input waveguide arms meeting in a central section and a central output waveguide arm and two diverging flanking output waveguide arms emanating from the central section. In-phase light from the input arms constructively interfers in the central section to produce a single mode output in the central output arm with the rest of the light being collected in the flanking output arms. Crosstalk between devices on a substrate is minimized by this collection of the out-of-phase light by the flanking output arms of the XY coupler.
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  • A fiber optic or optical waveguide illumination system includes a source coupling system. The source coupling system includes an optical channel with an internal cavity. A light source is disposed inside the driving circuit. Coupling losses are minimized by placing the light source within the optical channel. The source cavity and the source optical channel can be shaped to enhance the amount of light captured in the channel by total internal reflection. Multiple light distribution waveguides can be connected to the source coupling channel to produce an illumination system.
  • A monolithic tapered rib waveguide for transformation of the spot size of light between a semiconductor optical device and an optical fiber or from the fiber into the optical device. The tapered rib waveguide is integrated into the guiding rib atop a cutoff mesa type semiconductor device such as an expanded mode optical modulator or and expanded mode laser. The tapered rib acts to force the guided light down into the mesa structure of the semiconductor optical device instead of being bound to the interface between the bottom of the guiding rib and the top of the cutoff mesa. Themore » single mode light leaving or entering the output face of the mesa structure then can couple to the optical fiber at coupling losses of 1.0 dB or less.« less