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The multipeak phenomena and nonlinear effects in q-switched fiber lasers

The multipeak phenomena and nonlinear effects in q-switched fiber lasers
The multipeak phenomena and nonlinear effects in q-switched fiber lasers
We investigate control of the Q-switch rise time as a means to eliminate the undesirable formation of multipeak structure within actively Q-switched fiber lasers. Our experiments show that the development of pulse substructure is solely due to gain dynamic effects and that nonlinearity does not play a decisive role in the process. Using a spectrally resolved optical time gating technique, we investigate nonlinear pulse evolution for both smooth and structured Q-switch pulses of otherwise similar characteristics in Q-switch cavity comprising anomalously dispersive fiber. Useful insight is obtained into the complex interplay of the gain dynamic and various nonlinear effects governing the detailed pulse evolution. The measurements highlight the value and potential of this characterization technique for studying such lasers.
q-switched lasers, erbium-doped fiber laser, laser dynamics, modulation instability
1041-1135
1763-1765
Lim, Ee-Leong
55c097dc-30d4-49df-9995-894c87dc2560
Alam, Shaif-ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Lim, Ee-Leong
55c097dc-30d4-49df-9995-894c87dc2560
Alam, Shaif-ul
2b6bdbe5-ddcc-4a88-9057-299360b93435
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Lim, Ee-Leong, Alam, Shaif-ul and Richardson, David J. (2011) The multipeak phenomena and nonlinear effects in q-switched fiber lasers. IEEE Photonics Technology Letters, 23 (23), 1763-1765. (doi:10.1109/LPT.2011.2169395).

Record type: Article

Abstract

We investigate control of the Q-switch rise time as a means to eliminate the undesirable formation of multipeak structure within actively Q-switched fiber lasers. Our experiments show that the development of pulse substructure is solely due to gain dynamic effects and that nonlinearity does not play a decisive role in the process. Using a spectrally resolved optical time gating technique, we investigate nonlinear pulse evolution for both smooth and structured Q-switch pulses of otherwise similar characteristics in Q-switch cavity comprising anomalously dispersive fiber. Useful insight is obtained into the complex interplay of the gain dynamic and various nonlinear effects governing the detailed pulse evolution. The measurements highlight the value and potential of this characterization technique for studying such lasers.

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More information

Published date: 1 December 2011
Keywords: q-switched lasers, erbium-doped fiber laser, laser dynamics, modulation instability
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 341123
URI: http://eprints.soton.ac.uk/id/eprint/341123
ISSN: 1041-1135
PURE UUID: a34cef4f-f3fa-4315-93e4-3a20fde9353a
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 16 Jul 2012 08:58
Last modified: 28 Apr 2022 01:35

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Contributors

Author: Ee-Leong Lim
Author: Shaif-ul Alam

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