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Power scaling of single-frequency ytterbium-doped fiber master oscillator power amplifier sources up to 500W

Power scaling of single-frequency ytterbium-doped fiber master oscillator power amplifier sources up to 500W
Power scaling of single-frequency ytterbium-doped fiber master oscillator power amplifier sources up to 500W
We discuss continuous-wave single-frequency master oscillator - power amplifier (MOPA) sources based on ytterbium-doped fibers (YDFs) with particular attention to their recent dramatic advances and our up-to-date experimental results. This includes a 402 W plane polarized MOPA source and a 511 W random-polarized MOPA source. In these MOPAs, the final-stage high-power amplifier could operate with high efficiency of 70% - 80% and even more, and a high gain of over 20 dB in a near diffraction-limited beam. We could see at least 7 dB enhancement of the stimulated Brillouin scattering (SBS) threshold for the 402 W polarization-maintaining (PM) YDF. In fact, we did not see any sign of SBS even at the highest output power. We eventually observed SBS appearance at around 500 W for the non-PM YDF. The observed SBS strengths were far weaker than expected in theory unless we allowed for the Brillouin gain reduction from thermal Brillouin gain broadening induced by the quantum-defect heating.
brillouin scattering, optical fiber amplifiers, ytterbium, optical fiber, lasers
1077-260X
546-551
Jeong, Y.
85777b88-d35d-4e46-addb-1894fde2385d
Nilsson, J.
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Horley, R.
5654f7ad-7c82-48e5-b1c2-09b738b15a87
Hickey, L.M.B.
8879d8f5-f865-4099-8867-8ab9097ae74e
Turner, P.W.
b84fbbe4-2e35-4d0d-9b84-e654be63c4b9
Jeong, Y.
85777b88-d35d-4e46-addb-1894fde2385d
Nilsson, J.
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Horley, R.
5654f7ad-7c82-48e5-b1c2-09b738b15a87
Hickey, L.M.B.
8879d8f5-f865-4099-8867-8ab9097ae74e
Turner, P.W.
b84fbbe4-2e35-4d0d-9b84-e654be63c4b9

Jeong, Y., Nilsson, J., Sahu, Jayanta, Payne, D.N., Horley, R., Hickey, L.M.B. and Turner, P.W. (2007) Power scaling of single-frequency ytterbium-doped fiber master oscillator power amplifier sources up to 500W IEEE Journal of Selected Topics in Quantum Electronics, 13, (3), pp. 546-551.

Record type: Article

Abstract

We discuss continuous-wave single-frequency master oscillator - power amplifier (MOPA) sources based on ytterbium-doped fibers (YDFs) with particular attention to their recent dramatic advances and our up-to-date experimental results. This includes a 402 W plane polarized MOPA source and a 511 W random-polarized MOPA source. In these MOPAs, the final-stage high-power amplifier could operate with high efficiency of 70% - 80% and even more, and a high gain of over 20 dB in a near diffraction-limited beam. We could see at least 7 dB enhancement of the stimulated Brillouin scattering (SBS) threshold for the 402 W polarization-maintaining (PM) YDF. In fact, we did not see any sign of SBS even at the highest output power. We eventually observed SBS appearance at around 500 W for the non-PM YDF. The observed SBS strengths were far weaker than expected in theory unless we allowed for the Brillouin gain reduction from thermal Brillouin gain broadening induced by the quantum-defect heating.

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Published date: May 2007
Keywords: brillouin scattering, optical fiber amplifiers, ytterbium, optical fiber, lasers

Identifiers

Local EPrints ID: 47790
URI: http://eprints.soton.ac.uk/id/eprint/47790
ISSN: 1077-260X
PURE UUID: 100233a1-794a-4cca-b8ca-2da45221e1c3
ORCID for J. Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

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Date deposited: 10 Aug 2007
Last modified: 21 Oct 2017 15:11

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Contributors

Author: Y. Jeong
Author: J. Nilsson ORCID iD
Author: Jayanta Sahu
Author: D.N. Payne
Author: R. Horley
Author: L.M.B. Hickey
Author: P.W. Turner

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