Polarization-independent optical wavelength filter for channel dropping applications

Deri, Robert J; Patterson, Frank

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

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870411

Deri, Robert J ^[1]; Patterson, Frank ^[2]

Pleasanton, CA
Livermore, CA

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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

DOE Contract Number:: W-7405-ENG-48

Assignee:: Regents of University of California (Oakland, CA)

Patent Number(s):: US 5515461

OSTI ID:: 870411

Country of Publication:: United States

Language:: English

References (15)

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A novel integrated optics wavelength filter in InGaAsP-InP Broberg, B.; Lindgren, B.; Oberg, M. Journal of Lightwave Technology, Vol. 4, Issue 2 https://doi.org/10.1109/JLT.1986.1074686	journal	January 1986
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InGaAs/InGaAsP MQW optical amplifier integrated with grating-assisted vertical-coupler noise filter Kim, I.; Alferness, R. C.; Buhl, L. L. IEEE Photonics Technology Letters, Vol. 5, Issue 11 https://doi.org/10.1109/68.250056	journal	November 1993
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Related Subjects

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/

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

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References (15)

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