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Selective generation of Laguerre-Gaussian (LG0n) mode output in a diode-laser pumped Nd:YAG laser

Selective generation of Laguerre-Gaussian (LG0n) mode output in a diode-laser pumped Nd:YAG laser
Selective generation of Laguerre-Gaussian (LG0n) mode output in a diode-laser pumped Nd:YAG laser
Direct excitation of an arbitrary Laguerre-Gaussian (LG0n) doughnut mode in an end-pumped solid-state laser using a fiber-based pump beam conditioning scheme to produce a ring-shaped inversion distribution is reported. An analytical expression for the dependence of threshold pump power for a particular LG0n mode on the spatial overlap with the pump beam is derived and shows that the desired LG0n mode can be selectively excited through simple adjustment of the pump beam dimensions. This approach has been applied to a diode-laser pumped Nd:YAG laser to achieve selective lasing on the LG01, LG02 or LG03 mode. Predicted values for threshold pump power and beam propagation factor (M2) are in good agreement with measured values. The prospects for further improvement in laser performance will be discussed.
laser resonators, laser theory, nd yag lasers, laguerre-gaussian mode
0030-4018
109-112
Kim, J.W.
43f1b0c3-5a59-4449-a56a-386668bd061a
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Kim, J.W.
43f1b0c3-5a59-4449-a56a-386668bd061a
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2

Kim, J.W. and Clarkson, W.A. (2013) Selective generation of Laguerre-Gaussian (LG0n) mode output in a diode-laser pumped Nd:YAG laser. Optics Communications, 296, 109-112. (doi:10.1016/j.optcom.2013.01.046).

Record type: Article

Abstract

Direct excitation of an arbitrary Laguerre-Gaussian (LG0n) doughnut mode in an end-pumped solid-state laser using a fiber-based pump beam conditioning scheme to produce a ring-shaped inversion distribution is reported. An analytical expression for the dependence of threshold pump power for a particular LG0n mode on the spatial overlap with the pump beam is derived and shows that the desired LG0n mode can be selectively excited through simple adjustment of the pump beam dimensions. This approach has been applied to a diode-laser pumped Nd:YAG laser to achieve selective lasing on the LG01, LG02 or LG03 mode. Predicted values for threshold pump power and beam propagation factor (M2) are in good agreement with measured values. The prospects for further improvement in laser performance will be discussed.

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More information

Published date: June 2013
Keywords: laser resonators, laser theory, nd yag lasers, laguerre-gaussian mode
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 357268
URI: https://eprints.soton.ac.uk/id/eprint/357268
ISSN: 0030-4018
PURE UUID: 562e0ab4-50a5-43dd-9358-540d0bc78b79

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Date deposited: 04 Oct 2013 14:53
Last modified: 08 Jul 2019 16:31

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Contributors

Author: J.W. Kim
Author: W.A. Clarkson

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