Binary optical true-time delay based on the white cell: design and demonstration

An optical true-time delay device that uses a binary counting system in a modified White cell is demonstrated. The switching engine uses four spherical mirrors and a three-state digital micromirror array. The delay part, as designed, provides 6 bits of delay ranging from 78 ps to 5 ns, using a combi...

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Bibliographic Details
Published in:Journal of lightwave technology 2006-04, Vol.24 (4), p.1886-1895
Main Authors: Anderson, B.L., Rabb, D.J., Warnky, C.M., Abou-Galala, F.
Format: Article
Language:English
Subjects:
Applied sciences
Array signal processing
Arrays
beam steering
Circuit properties
Counting
Delay
Design engineering
Electric, optical and optoelectronic circuits
Electronics
Engines
Exact sciences and technology
Integrated optics. Optical fibers and wave guides
Lenses
Micro- and nanoelectromechanical devices (mems/nems)
microelectromechanical devices
Micromechanical devices
Micromirrors
Mirrors
Noise levels
Optical and optoelectronic circuits
optical delay lines
Optical design
Optical devices
Optical signal processing
phased array radars
Phased arrays
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Switching
Switching and signalling
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Trains
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Description
Summary:An optical true-time delay device that uses a binary counting system in a modified White cell is demonstrated. The switching engine uses four spherical mirrors and a three-state digital micromirror array. The delay part, as designed, provides 6 bits of delay ranging from 78 ps to 5 ns, using a combination of dielectric blocks for short delays and lens trains for longer ones. Long lens trains are folded for compactness. The authors describe the design and demonstrate two of the 6 bits of delays experimentally. Delays were accurate to within the measurement resolution of 1.25 ps. The insertion loss varied from 3.1-5.2 dB, depending on delay. It was found that the micromirrors do not contribute significantly to the loss.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2006.871032