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Anti-Stokes Raman gain enabled by modulation instability in mid IR waveguides

Anti-Stokes Raman gain enabled by modulation instability in mid IR waveguides
Anti-Stokes Raman gain enabled by modulation instability in mid IR waveguides
The inclusion of self-steepening in the linear stability analysis of modulation instability (MI) leads to a power cutoff above which the MI gain vanishes. Under these conditions, MI in mid-IR waveguides is shown to give rise to the usual double-sideband spectrum, but with Raman-shaped sidelobes. This results from the energy transfer of a CW laser simultaneously to both Stokes and anti-Stokes bands in pseudo-parametric fashion. As such, the anti-Stokes gain matches completely the Stokes profile over the entire gain bandwidth. This remarkable behavior, not expected from an unexcited medium, is shown not to follow from a conventional four-wave mixing interaction between the pump and the Stokes band. We believe this observation to be of relevance in the area of Raman-based sensors which, in several instances, rely on monitoring small power variations of the anti-Stokes spectral component.
0740-3224
2828-2832
Sanchez, A.D.
2b1ebc94-525f-4ca0-bb83-b8bf3b3e2834
Fierens, P.I.
f34febe8-3fa3-4062-95b1-df243edf348e
Hernandez, S.M.
295e424d-79a0-4715-ae16-21f65713958c
Bonetti, J.
15dbb61e-8282-42ba-847a-b07a67d9587c
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Grosz, D.F.
a910ce9b-483e-4b1d-847b-3207f027b2ef
Sanchez, A.D.
2b1ebc94-525f-4ca0-bb83-b8bf3b3e2834
Fierens, P.I.
f34febe8-3fa3-4062-95b1-df243edf348e
Hernandez, S.M.
295e424d-79a0-4715-ae16-21f65713958c
Bonetti, J.
15dbb61e-8282-42ba-847a-b07a67d9587c
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Grosz, D.F.
a910ce9b-483e-4b1d-847b-3207f027b2ef

Sanchez, A.D., Fierens, P.I., Hernandez, S.M., Bonetti, J., Brambilla, Gilberto and Grosz, D.F. (2018) Anti-Stokes Raman gain enabled by modulation instability in mid IR waveguides. Journal of the Optical Society of America B, 35 (11), 2828-2832. (doi:10.1364/JOSAB.35.002828).

Record type: Article

Abstract

The inclusion of self-steepening in the linear stability analysis of modulation instability (MI) leads to a power cutoff above which the MI gain vanishes. Under these conditions, MI in mid-IR waveguides is shown to give rise to the usual double-sideband spectrum, but with Raman-shaped sidelobes. This results from the energy transfer of a CW laser simultaneously to both Stokes and anti-Stokes bands in pseudo-parametric fashion. As such, the anti-Stokes gain matches completely the Stokes profile over the entire gain bandwidth. This remarkable behavior, not expected from an unexcited medium, is shown not to follow from a conventional four-wave mixing interaction between the pump and the Stokes band. We believe this observation to be of relevance in the area of Raman-based sensors which, in several instances, rely on monitoring small power variations of the anti-Stokes spectral component.

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Sanchez (preprint) - Anti-Stokes Raman gain enabled by modulation instability in mid-IR waveguides - Accepted Manuscript
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Accepted/In Press date: 27 September 2018
e-pub ahead of print date: 27 September 2018
Published date: 1 November 2018

Identifiers

Local EPrints ID: 423855
URI: http://eprints.soton.ac.uk/id/eprint/423855
ISSN: 0740-3224
PURE UUID: 72e00661-9f5f-48ad-a2a8-836c8002159b
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

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Date deposited: 03 Oct 2018 16:30
Last modified: 02 Apr 2022 01:38

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Contributors

Author: A.D. Sanchez
Author: P.I. Fierens
Author: S.M. Hernandez
Author: J. Bonetti
Author: D.F. Grosz

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