Highly efficient high power single-mode fiber amplifier utilizing the distributed mode filtering bandgap rod fiber

Marko Laurila; Thomas T. Alkeskjold; Mette Marie Jørgensen; Sidsel R. Petersen; Jes Broeng; Jesper Lægsgaard

doi:10.1117/12.907736

Highly efficient high power single-mode fiber amplifier utilizing the distributed mode filtering bandgap rod fiber

Marko Laurila, Thomas T. Alkeskjold, Mette Marie Jørgensen, Sidsel R. Petersen, Jes Broeng, Jesper Lægsgaard

NKT Group

Research output: Contribution to journal › Conference article › Research › peer-review

Abstract

We report on an ytterbium doped single mode distributed mode filtering rod fiber in an amplifier configuration delivering high average output power, up to 292 watts, using a mode-locked 30ps source at 1032nm with good power conversion efficiency. We study the modal stability of the output beam at high average output power levels and demonstrate a 44% power improvement before the threshold-like onset of mode instabilities by operating the rod fiber in a leaky waveguide regime. We investigate the guiding dynamics of the rod fiber and explain the improved performance by thermally induced refractive index profile change.

Original language	English
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	8237
Issue number	1
Pages (from-to)	823710
ISSN	0277-786X
DOIs	https://doi.org/10.1117/12.907736
Publication status	Published - 2012
Event	SPIE Photonics West LASE 2012 - San Francisco, United States Duration: 21 Jan 2012 → 26 Jan 2012

Conference

Conference	SPIE Photonics West LASE 2012
Country/Territory	United States
City	San Francisco
Period	21/01/2012 → 26/01/2012

Keywords

Fiber lasers
Micro structure fibers

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10.1117/12.907736

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@inproceedings{c73308937b7448ee95576090d46829a3,

title = "Highly efficient high power single-mode fiber amplifier utilizing the distributed mode filtering bandgap rod fiber",

abstract = "We report on an ytterbium doped single mode distributed mode filtering rod fiber in an amplifier configuration delivering high average output power, up to 292 watts, using a mode-locked 30ps source at 1032nm with good power conversion efficiency. We study the modal stability of the output beam at high average output power levels and demonstrate a 44% power improvement before the threshold-like onset of mode instabilities by operating the rod fiber in a leaky waveguide regime. We investigate the guiding dynamics of the rod fiber and explain the improved performance by thermally induced refractive index profile change.",

keywords = "Fiber lasers, Micro structure fibers",

author = "Marko Laurila and Alkeskjold, {Thomas T.} and J{\o}rgensen, {Mette Marie} and Petersen, {Sidsel R.} and Jes Broeng and Jesper L{\ae}gsgaard",

year = "2012",

doi = "10.1117/12.907736",

language = "English",

volume = "8237",

pages = "823710",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

issn = "0277-786X",

publisher = "Society of Photo-Optical Instrumentation Engineers",

number = "1",

note = "SPIE Photonics West LASE 2012 ; Conference date: 21-01-2012 Through 26-01-2012",

}

Highly efficient high power single-mode fiber amplifier utilizing the distributed mode filtering bandgap rod fiber. / Laurila, Marko; Alkeskjold, Thomas T.; Jørgensen, Mette Marie et al.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 8237, No. 1, 2012, p. 823710.

Research output: Contribution to journal › Conference article › Research › peer-review

TY - GEN

T1 - Highly efficient high power single-mode fiber amplifier utilizing the distributed mode filtering bandgap rod fiber

AU - Laurila, Marko

AU - Alkeskjold, Thomas T.

AU - Jørgensen, Mette Marie

AU - Petersen, Sidsel R.

AU - Broeng, Jes

AU - Lægsgaard, Jesper

PY - 2012

Y1 - 2012

N2 - We report on an ytterbium doped single mode distributed mode filtering rod fiber in an amplifier configuration delivering high average output power, up to 292 watts, using a mode-locked 30ps source at 1032nm with good power conversion efficiency. We study the modal stability of the output beam at high average output power levels and demonstrate a 44% power improvement before the threshold-like onset of mode instabilities by operating the rod fiber in a leaky waveguide regime. We investigate the guiding dynamics of the rod fiber and explain the improved performance by thermally induced refractive index profile change.

AB - We report on an ytterbium doped single mode distributed mode filtering rod fiber in an amplifier configuration delivering high average output power, up to 292 watts, using a mode-locked 30ps source at 1032nm with good power conversion efficiency. We study the modal stability of the output beam at high average output power levels and demonstrate a 44% power improvement before the threshold-like onset of mode instabilities by operating the rod fiber in a leaky waveguide regime. We investigate the guiding dynamics of the rod fiber and explain the improved performance by thermally induced refractive index profile change.

KW - Fiber lasers

KW - Micro structure fibers

U2 - 10.1117/12.907736

DO - 10.1117/12.907736

M3 - Conference article

SN - 0277-786X

VL - 8237

SP - 823710

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

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T2 - SPIE Photonics West LASE 2012

Y2 - 21 January 2012 through 26 January 2012

ER -

Highly efficient high power single-mode fiber amplifier utilizing the distributed mode filtering bandgap rod fiber

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