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Title: Polarization-independent optical wavelength filter for channel dropping applications

Abstract

The polarization dependence of optical wavelength filters is eliminated by using waveguide directional couplers. Material birefringence is used to compensate for the waveguide (electromagnetic) birefringence which is the original cause of the polarization dependence. Material birefringence is introduced in a controllable fashion by replacing bulk waveguide layers by finely layered composites, such as multiple quantum wells using III-V semiconductor materials. The filter has use in wavelength-division-multiplexed fiber optic communication systems. This filter has broad application for wavelength-tunable receivers in fiber optic communication links, which may be used for telecommunications, optical computer interconnect links, or fiber optic sensor systems. Since multiple-wavelength systems are increasingly being used for all of these applications, the filter is useable whenever a rapidly tunable, wavelength-filtering receiver is required.

Inventors:
 [1];  [2]
  1. Pleasanton, CA
  2. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
870411
Patent Number(s):
5515461
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
polarization-independent; optical; wavelength; filter; channel; dropping; applications; polarization; dependence; filters; eliminated; waveguide; directional; couplers; material; birefringence; compensate; electromagnetic; original; introduced; controllable; fashion; replacing; bulk; layers; finely; layered; composites; multiple; quantum; iii-v; semiconductor; materials; wavelength-division-multiplexed; fiber; optic; communication; systems; broad; application; wavelength-tunable; receivers; links; telecommunications; computer; interconnect; sensor; multiple-wavelength; increasingly; useable; whenever; rapidly; tunable; wavelength-filtering; receiver; required; optical wavelength; broad application; directional coupler; semiconductor materials; fiber optic; semiconductor material; optic sensor; sensor systems; wavelength filter; optical wave; communication systems; iii-v semiconductor; optic communication; multiple quantum; communication link; /385/

Citation Formats

Deri, Robert J, and Patterson, Frank. Polarization-independent optical wavelength filter for channel dropping applications. United States: N. p., 1996. Web.
Deri, Robert J, & Patterson, Frank. Polarization-independent optical wavelength filter for channel dropping applications. United States.
Deri, Robert J, and Patterson, Frank. Mon . "Polarization-independent optical wavelength filter for channel dropping applications". United States. https://www.osti.gov/servlets/purl/870411.
@article{osti_870411,
title = {Polarization-independent optical wavelength filter for channel dropping applications},
author = {Deri, Robert J and Patterson, Frank},
abstractNote = {The polarization dependence of optical wavelength filters is eliminated by using waveguide directional couplers. Material birefringence is used to compensate for the waveguide (electromagnetic) birefringence which is the original cause of the polarization dependence. Material birefringence is introduced in a controllable fashion by replacing bulk waveguide layers by finely layered composites, such as multiple quantum wells using III-V semiconductor materials. The filter has use in wavelength-division-multiplexed fiber optic communication systems. This filter has broad application for wavelength-tunable receivers in fiber optic communication links, which may be used for telecommunications, optical computer interconnect links, or fiber optic sensor systems. Since multiple-wavelength systems are increasingly being used for all of these applications, the filter is useable whenever a rapidly tunable, wavelength-filtering receiver is required.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}

Works referenced in this record:

Polarization‐independent wavelength filter using a grating‐assisted vertical directional coupler in InP
journal, May 1994


Codirectional grating-coupled filter for wavelength selective photodetection
journal, January 1992


Wavelength tuning in a grating‐assisted vertical coupler filter using quantum well electrorefraction
journal, December 1991


Photonic integrated tunable receivers with optical preamplifiers for direct detection
journal, August 1993


A novel integrated optics wavelength filter in InGaAsP-InP
journal, January 1986


Broadly tunable InGaAsP/InP laser based on a vertical coupler filter with 57‐nm tuning range
journal, June 1992


Grating‐assisted InGaAsP/InP vertical codirectional coupler filter
journal, November 1989


Tunable optical waveguide directional coupler filter
journal, July 1978


Sidelobe suppression in grating-assisted wavelength-selective couplers
journal, January 1992


Vertically coupled InGaAsP/InP buried rib waveguide filter
journal, November 1991


Wavelength selective interlayer directionally grating‐coupled InP/InGaAsP waveguide photodetection
journal, October 1987


Grating-assisted directional coupler filters using AlGaAs/GaAs MQW waveguides
journal, October 1991


A vertically coupled InGaAsP/InP directional coupler filter of ultranarrow bandwidth
journal, June 1991


InGaAs/InGaAsP MQW optical amplifier integrated with grating-assisted vertical-coupler noise filter
journal, November 1993


Broadly tunable InGaAsP/InP buried rib waveguide vertical coupler filter
journal, February 1992