Acoustic build-up in on-chip stimulated Brillouin scattering

C. Wolff*, M. J. Steel, B. J. Eggleton, C. G. Poulton

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)
6 Downloads (Pure)

Abstract

We investigate the role of the spatial evolution of the acoustic field in stimulated Brillouin scattering processes in short high-gain structures. When the gain is strong enough that the gain length becomes comparable to the acoustic wave decay length of order 100 microns, standard approximations treating the acoustic field as a local response no longer apply. Treating the acoustic evolution more accurately, we find that the backward SBS gain of sub-millimetre long waveguides is significantly reduced from the value obtained by the conventional treatment because the acoustic mode requires several decay lengths to build up to its nominal value. In addition, the corresponding resonance line is broadened with the development of side bands. In contrast, we argue that intra-mode forward SBS is not expected to show these effects. Our results have implications for several recent proposals and experiments on high-gain stimulated Brillouin scattering in short semiconductor waveguides.

Original languageEnglish
Article number13656
Pages (from-to)1-7
Number of pages7
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 4 Sep 2015

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Fingerprint Dive into the research topics of 'Acoustic build-up in on-chip stimulated Brillouin scattering'. Together they form a unique fingerprint.

  • Cite this