WavelengthSelective TrueTimeDelay For OpticallyControlled Phased Array Sensors

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Wavelength-Selective True-Time-Delay For
Optically-Controlled Phased Array Sensors

• S. Yegnanarayanan, F. Coppinger and B. Jalali
• Optoelectronic Circuits and Systems Laboratory
• Electrical Engineering Department
• UCLA
• jalali_at_ucla.edu

Funding Agency DARPA/STO
Contracting Agency US Air Force Rome Laboratory
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The Problem of Beam Squint
Require True-Time-Delay For Wide Instantaneous BW
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Self-Routing Time-Delay Device

• No Switches/Circulators
• Broadband Operation
• Scalable Low Loss
• Compact/Monolithic

Yegnanarayanan, Trinh, Jalali, Opt. Lett. May
15,1996
Yegnanarayanan Jalali, US Patent No. 5793907
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Optically-Controlled Two-Dimensional Beam
Steering
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Two-Dimensional Beam Steering Experiment
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Measured Time-Domain Response
1547.6nm
1553.2nm
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Compact Range Test Setup
Receive Horn
2 element X-band Transmitter
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Wide Instantaneous Bandwidth

• Measured Spectrum of 1ns pulsed 10GHz carrier

• Receiving Horn at the node of antenna pattern

Signal from one antenna element