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A 32-element 8-bit photonic true-time-delay system based on a 288 x 288 3-D MEMS optical switch

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5 Author(s)
Kaman, V. ; Calient Networks, Goleta, CA, USA ; Xuezhe Zheng ; Helkey, R.J. ; Pusarla, C.
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A large-scale three-dimensional microelectromechanical-system optical switch is used for the first time to realize a true-time-delay (TTD) beamformer for phased-array radar applications, with a capacity of 32 antenna elements and eight bits of delay. The 288 /spl times/ 288 optical switch has a median loss of 1.4 dB and all measured 82 944 paths exhibit less than 2.3 dB loss at 1310 nm. The TTD beamformer exhibits a loss variation of 1.5 dB, which is equalized using a mirror-offset technique.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 6 )

Date of Publication:

June 2003

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