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Proceedings Paper

High-density broadband true-time-delay unit on a single substrate
Author(s): Richard Liqiang Li; Zhenhai Fu; Ray T. Chen
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Paper Abstract

High packing density true-time-delay lines based on substrate guided wave propagation combined with slanted volume phase grating fanout couplers are reported. Three-bit delay lines with delay step of approximately 100 ps are fabricated on BK-7 substrates with a substrate bouncing angle of 45 degrees. The fanout power fluctuation problem is experimentally investigated. An ultrashort laser pulse is sent through the device and a bandwidth measurement of 2.5 THz is obtained. The 100 ps delay step is also measured by employing an ultrafast MSM-photodetector together with a sampling scope. Optically heterodyned signals up to 25 GHz also are detected through the delay unit with a signal-to- noise ratio of 20 dB.

Paper Details

Date Published: 22 January 1997
PDF: 8 pages
Proc. SPIE 3006, Optoelectronic Integrated Circuits, (22 January 1997); doi: 10.1117/12.264226
Show Author Affiliations
Richard Liqiang Li, Univ. of Texas/Austin (United States)
Zhenhai Fu, Univ. of Texas/Austin (United States)
Ray T. Chen, Univ. of Texas/Austin (United States)


Published in SPIE Proceedings Vol. 3006:
Optoelectronic Integrated Circuits
Yoon-Soo Park; Ramu V. Ramaswamy, Editor(s)

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