The University of Southampton
University of Southampton Institutional Repository

Photodarkening-induced phase distortions and their effects In single-channel and coherently combined Yb-doped fiber chirped pulse amplification systems

Photodarkening-induced phase distortions and their effects In single-channel and coherently combined Yb-doped fiber chirped pulse amplification systems
Photodarkening-induced phase distortions and their effects In single-channel and coherently combined Yb-doped fiber chirped pulse amplification systems
We use numerical simulations to investigate the effects of photodarkening (PD) on pulse compression and coherent combination following chirped-pulse amplification in Yb-doped fiber amplifiers. Even though we increase the pump power to keep the pulse energy constant, PD degrades the pulses due to phase distortions resulting from heating acting already within a pulse as well as to increased self-phase modulation if the fiber length is optimized for the PD-free fiber at beginning of life. By contrast, in a fiber shorter than this, the drop in peak power is a relatively modest 35% even at a PD propagation loss as large as 5 dB, thus providing effective mitigation against PD-induced phase distortions. The improvements extend to the combination efficiency of beam-combined systems.
Fiber lasers , Ultrafast optics , Phase distortion
0733-8724
5521-5527
Feng, Yujun
25a28374-33d9-478f-9bd2-98f0d93231af
Zhang, Betty Meng
93b8aca7-c6ae-45b9-9bcd-c201fdf2d116
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Feng, Yujun
25a28374-33d9-478f-9bd2-98f0d93231af
Zhang, Betty Meng
93b8aca7-c6ae-45b9-9bcd-c201fdf2d116
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b

Feng, Yujun, Zhang, Betty Meng and Nilsson, Johan (2018) Photodarkening-induced phase distortions and their effects In single-channel and coherently combined Yb-doped fiber chirped pulse amplification systems. Journal of Lightwave Technology, 36 (23), 5521-5527. (doi:10.1109/JLT.2018.2874086).

Record type: Article

Abstract

We use numerical simulations to investigate the effects of photodarkening (PD) on pulse compression and coherent combination following chirped-pulse amplification in Yb-doped fiber amplifiers. Even though we increase the pump power to keep the pulse energy constant, PD degrades the pulses due to phase distortions resulting from heating acting already within a pulse as well as to increased self-phase modulation if the fiber length is optimized for the PD-free fiber at beginning of life. By contrast, in a fiber shorter than this, the drop in peak power is a relatively modest 35% even at a PD propagation loss as large as 5 dB, thus providing effective mitigation against PD-induced phase distortions. The improvements extend to the combination efficiency of beam-combined systems.

Text
IEEE Photo Darkening Heating Induced Phase Distortion - Author's Original
Download (1MB)
Text
Photodarkening-Induced Phase Distortions And Their Effects In Single-Channel And Coherently Combined Yb-Doped Fiber Chirped Pulse Amplification Syste - Accepted Manuscript
Download (1MB)

More information

Submitted date: 29 March 2018
Accepted/In Press date: 25 September 2018
e-pub ahead of print date: 4 October 2018
Published date: December 2018
Keywords: Fiber lasers , Ultrafast optics , Phase distortion

Identifiers

Local EPrints ID: 425058
URI: http://eprints.soton.ac.uk/id/eprint/425058
ISSN: 0733-8724
PURE UUID: 8d321421-d9ea-4d6c-9a96-ad69f15275cf
ORCID for Yujun Feng: ORCID iD orcid.org/0000-0001-7839-065X
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

Catalogue record

Date deposited: 09 Oct 2018 16:30
Last modified: 16 Mar 2024 03:01

Export record

Altmetrics

Contributors

Author: Yujun Feng ORCID iD
Author: Betty Meng Zhang
Author: Johan Nilsson ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×