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Demonstration of spectral holes in homogenous Brillouin gain profile in microwave domain

A. Siva Shakthi, A. B. Yelikar, Ravi Pant

Published Jan 1, 2018• 0 citations
Publisher

Abstract

We report demonstration of room temperature artificial spectral hole burning in microwave domain. Narrow spectral hole with 3 dB linewidth ~6 MHz and depth > 35 dB is burned in homogenously broadened Brillouin gain spectra.
DOI
10.1364/cleopr.2018.f1c.3

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Spectral hole-burning (SHB) technology is considered for >10-GHz instantaneous bandwidth signal-processing applications. In this context we report on what is believed to be the first demonstration of a SHB microwave spectrometer. A set of gratings engraved in a SHB crystal is used to filter one sideband of the optically carried microwave signal. The setup is confined to narrow-bandwidth operation, over a 35-MHz-wide interval. The first findings confirm the validity of the architecture in terms of spectral resolution, angular channel separation, and simultaneous detection of multiple spectral lines.