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Updated: May 29, 2026
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
High power Er:YAG laser with radially-polarized Laguerre-Gaussian (LG01) mode output
J W Kim1, J I Mackenzie, J R Hayes
1Optoelectronics Research Center, University of Southampton, Southampton SO17 1BJ, UK. jwk7417@hanyang.ac.kr
Abstract:
A simple method for conditioning the pump beam in an end-pumped solid-state laser to allow direct excitation of the first order Laguerre-Gaussian doughnut (LG01) mode is reported. This approach has been applied to a hybrid (fiber-laser-pumped) Er:YAG laser yielding 13.1 W of continuous-wave output at 1645 nm in a radially-polarized LG01 doughnut beam with beam propagation factor (M(2)) < 2.4 for 34 W of incident pump power at 1532 nm. The corresponding slope efficiency with respect to incident pump power was 48%. The prospects of further power scaling and improved laser performance are discussed.
