High channel density wavelength division multiplexer with defined diffracting means positioning

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867383

Jannson, Tomasz P ^[1]; Jannson, Joanna L ^[1]; Yeung, Peter C ^[1]

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1. Redondo Beach, CA

A wavelength division multiplexer/demultiplexer having optical path lengths between a fiber array and a Fourier transform lens, and between a dispersion grating and the lens equal to the focal length of the lens. The optical path lengths reduce losses due to angular acceptance mismatch in the multiplexer. Close orientation of the fiber array about the optical axis and the use of a holographic dispersion grating reduces other losses in the system. Multi-exposure holographic dispersion gratings enable the multiplexer/demultiplexer for extremely broad-band simultaneous transmission and reflection operation. Individual Bragg plane sets recorded in the grating are dedicated to and operate efficiently on discrete wavelength ranges.

• Research Organization: Physical Optics Corp
• DOE Contract Number: AC03-86ER80416
• Assignee: Physical Optics Corporation (Torrance, CA)
• Patent Number(s): US 4926412
• OSTI ID: 867383
• Country of Publication: United States
• Language: English

Related Subjects

channel
density
wavelength
division
multiplexer
defined
diffracting
means
positioning
demultiplexer
optical
path
lengths
fiber
array
fourier
transform
lens
dispersion
grating
equal
focal
length
reduce
losses
due
angular
acceptance
mismatch
close
orientation
axis
holographic
reduces
multi-exposure
gratings
enable
extremely
broad-band
simultaneous
transmission
reflection
operation
individual
bragg
plane
sets
recorded
dedicated
operate
efficiently
discrete
ranges
operate efficiently
path lengths
fiber array
losses due
wavelength range
optical axis
focal length
path length
optical path
fourier transform
wavelength division
angular acceptance
simultaneous transmission
wavelength ranges
transform lens
division multiplexer
/359/