Optical resonators for true-time-delay beam steering

Leslie H. Gesell; Stephen M. Evanko

doi:10.1117/12.243100

14 June 1996 Optical resonators for true-time-delay beam steering

Leslie H. Gesell, Stephen M. Evanko

Proceedings Volume 2749, Photonic Component Engineering and Applications; (1996) https://doi.org/10.1117/12.243100
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

Conventional true time delay beamforming and steering devices rely on switching between various lengths of delay line. Therefore only discrete delays are possible. Proposed is a new photonics concept for true time delay beamforming which provides a finely controlled continuum of delays with switching speeds on the order of 10's of nanoseconds or faster. The architecture uses an array of waveguide cavities with different resonate frequencies to channelize the signal. Each spectral component of the signal is phase shifted by an amount proportional to the frequency of that component and the desired time delay. These phase shifted spectral components are then summed to obtain the delayed signal. This paper provides an overview of the results of a Phase I SBIR contract where this concept has been refined and analyzed. The parameters for an operational system are determined and indication of the feasibility of this approach is given. Among the issues addressed are the requirements of the resonators and the methods necessary to implement fiber optic Bragg gratings as these resonators.

Citation Download Citation

Leslie H. Gesell and Stephen M. Evanko "Optical resonators for true-time-delay beam steering", Proc. SPIE 2749, Photonic Component Engineering and Applications, (14 June 1996); https://doi.org/10.1117/12.243100

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