High-density broadband true-time-delay unit on a single substrate

Richard Liqiang Li; Zhenhai Fu; Ray T. Chen

doi:10.1117/12.264226

22 January 1997 High-density broadband true-time-delay unit on a single substrate

Richard Liqiang Li, Zhenhai Fu, Ray T. Chen

Proceedings Volume 3006, Optoelectronic Integrated Circuits; (1997) https://doi.org/10.1117/12.264226
Event: Photonics West '97, 1997, San Jose, CA, United States

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.

Citation Download Citation

Richard Liqiang Li, Zhenhai Fu, and Ray T. Chen "High-density broadband true-time-delay unit on a single substrate", Proc. SPIE 3006, Optoelectronic Integrated Circuits, (22 January 1997); https://doi.org/10.1117/12.264226

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