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Optics Letters

Optics Letters


  • Vol. 23, Iss. 7 — Apr. 1, 1998
  • pp: 522–524

Compact broadband 5-bit photonic true-time-delay module for phased-array antennas

Zhenhai Fu, Richard Li, and Ray T. Chen  »View Author Affiliations

Optics Letters, Vol. 23, Issue 7, pp. 522-524 (1998)

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Photonic true-time-delay (TTD) lines offer many advantages over their electronic counterparts and are attracting more and more research effort. We demonstrate a device with 32 TTD lines (5-bit) based on substrate guided-wave propagation combined with slanted photopolymer volume phase gratings on a quartz substrate. System design, device fabrication, optimization of fan-out intensity uniformity, and device performance evaluation are addressed as well. The device has a measured bandwidth of up to 2.4 THz and a measured fan-out delay step of 50 ps. The fan-out beam intensity uniformity is within ±10% . The packing density is 2.5 delay lines/cm2, which is to our knowledge the highest demonstrated thus far.

© 1998 Optical Society ofAmerica

OCIS Codes
(250.5300) Optoelectronics : Photonic integrated circuits
(280.5110) Remote sensing and sensors : Phased-array radar

Zhenhai Fu, Richard Li, and Ray T. Chen, "Compact broadband 5-bit photonic true-time-delay module for phased-array antennas," Opt. Lett. 23, 522-524 (1998)

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