Bragg Gratings (BG) structures and slow-light approach for the processing of RF signals over large bandwidths

Abstract

Implementation of optical delay lines for microwave photonics requires the definition of dispersive structures able to perform large time delays over large RF bandwidths. Slow light approach and Chirped Bragg Gratings are proposed to overcome conventional limitations.

Principles of Structural Slow Light and Its Applications for Optical Fiber Sensors: A Review

“…[17] Kaba reported that multistage gratings, increasing grating length, or other techniques could enhance the effect of time delay. [18] Chen et al combined stimulated brillouin scattering (SBS) and FBG to increase the delay time. The delay time increased from 0.06-1.473 ns due to the SBS.…”