The University of Southampton
University of Southampton Institutional Repository

Cladding-pumped Yb-doped helical-core fibre lasers and amplifiers

Cladding-pumped Yb-doped helical-core fibre lasers and amplifiers
Cladding-pumped Yb-doped helical-core fibre lasers and amplifiers
Over the last few years there has been very rapid progress in scaling output power from cladding-pumped fibre lasers and amplifiers [1]. One of the key issues to address for further power-scaling of single-mode operation will be to increase the core area in order to avoid the need for excessively long fibres for efficient pump absorption, and to raise the threshold for unwanted nonlinear processes and optical damage, whilst maintaining robust single-mode operation. At the moment, this is generally achieved by employing a multimode large-mode-area core design with a low numerical aperture in combination with bend loss suppression of higher-order modes [2] to promote single-mode operation. However, scaling to higher power levels will require an even larger core diameter and a larger inner-cladding diameter to accommodate more pump power, making it increasingly difficult to coil the fibre with a small enough diameter to use bend-induced loss as an effective means for suppressing higher-order modes. An alternative approach for achieving single-mode operation in a large-core fibre laser/amplifier is to employ a fibre with a helical core trajectory within the inner-cladding. In a preliminary demonstration of this approach, we recently reported a core-pumped Yb-doped helical-core fibre laser with 350mW of single-mode output at 1047nm [3]. Here, we report a highly efficient cladding-pumped Yb-doped helical-core fibre laser at 1043nm with a much higher single-mode output power of ~60.4W and preliminary results for a cladding-pumped Yb-doped helical-core fibre amplifier seeded by a single-mode Yb:YAG laser at 1050nm. ---
p.512
Wang, P.
df957848-e6e4-45f0-ba01-2d966a30aa67
Cooper, L.J.
249c1748-92f2-42aa-9cbc-0e4f5dcc3bf9
Shcheslavskiy, V.
cc4f62a2-d01b-49cb-bc11-14584c26f544
Sahu, J.K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
CLEO/Europe-IQEC
Wang, P.
df957848-e6e4-45f0-ba01-2d966a30aa67
Cooper, L.J.
249c1748-92f2-42aa-9cbc-0e4f5dcc3bf9
Shcheslavskiy, V.
cc4f62a2-d01b-49cb-bc11-14584c26f544
Sahu, J.K.
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2

Wang, P., Cooper, L.J., Shcheslavskiy, V., Sahu, J.K. and Clarkson, W.A. (2005) Cladding-pumped Yb-doped helical-core fibre lasers and amplifiers. CLEO/Europe 2005: European Conference on Lasers and Electro-Optics 2005. 12 - 17 Jun 2005. p.512 . (doi:10.1109/CLEOE.2005.1568290).

Record type: Conference or Workshop Item (Paper)

Abstract

Over the last few years there has been very rapid progress in scaling output power from cladding-pumped fibre lasers and amplifiers [1]. One of the key issues to address for further power-scaling of single-mode operation will be to increase the core area in order to avoid the need for excessively long fibres for efficient pump absorption, and to raise the threshold for unwanted nonlinear processes and optical damage, whilst maintaining robust single-mode operation. At the moment, this is generally achieved by employing a multimode large-mode-area core design with a low numerical aperture in combination with bend loss suppression of higher-order modes [2] to promote single-mode operation. However, scaling to higher power levels will require an even larger core diameter and a larger inner-cladding diameter to accommodate more pump power, making it increasingly difficult to coil the fibre with a small enough diameter to use bend-induced loss as an effective means for suppressing higher-order modes. An alternative approach for achieving single-mode operation in a large-core fibre laser/amplifier is to employ a fibre with a helical core trajectory within the inner-cladding. In a preliminary demonstration of this approach, we recently reported a core-pumped Yb-doped helical-core fibre laser with 350mW of single-mode output at 1047nm [3]. Here, we report a highly efficient cladding-pumped Yb-doped helical-core fibre laser at 1043nm with a much higher single-mode output power of ~60.4W and preliminary results for a cladding-pumped Yb-doped helical-core fibre amplifier seeded by a single-mode Yb:YAG laser at 1050nm. ---

Full text not available from this repository.

More information

Published date: 2005
Additional Information: CJ1-5-THU
Venue - Dates: CLEO/Europe 2005: European Conference on Lasers and Electro-Optics 2005, 2005-06-12 - 2005-06-17

Identifiers

Local EPrints ID: 38324
URI: https://eprints.soton.ac.uk/id/eprint/38324
PURE UUID: 236708ba-ae40-44cc-9465-213bf5dfe395

Catalogue record

Date deposited: 08 Jun 2006
Last modified: 15 Jul 2019 19:03

Export record

Altmetrics

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 https://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.

×