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Raman-amplified pump and its use for parametric amplification and phase conjugation

Gordienko, V; Stephens, MFC; Ferreira, FM; Doran, NJ; (2020) Raman-amplified pump and its use for parametric amplification and phase conjugation. Optical Fiber Technology , 56 , Article 102183. 10.1016/j.yofte.2020.102183. Green open access

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Abstract

We experimentally demonstrate the use of a discrete Raman amplifier for generating a high power, narrow linewidth pump for use within a fiber optical parametric amplifier (FOPA). We demonstrate the suitability of the Raman-amplified pump for parametric amplification by characterizing its optical signal to noise ratio and relative intensity noise (RIN). The amplified pump is subsequently employed within a FOPA obtaining net gain of up to 24.9 dB and a gain of >11 dB over 35 nm. The approach described here offers the key advantage over traditional EDFA-based pump generation of wavelength tuneability outside the EDFA bands. In principle this allows to place the parametric pump at any wavelength within the low fiber attenuation window. Here we additionally demonstrate Raman-assisted optical phase conjugation to provide positive conversion efficiency over 60 nm whilst employing the phase-conjugating pump power of <10 mW not requiring an amplification by EDFA. We consider this technique to show a significant promise for broadband optical phase conjugation and wavelength conversion as well as the prospect for implementation of these important phenomena outside of the EDFA bands.

Type: Article
Title: Raman-amplified pump and its use for parametric amplification and phase conjugation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.yofte.2020.102183
Publisher version: https://doi.org/10.1016/j.yofte.2020.102183
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Fiber optical parametric amplification, Raman amplification, Raman-assisted optical phase conjugation, Wavelength conversion
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10093658
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