Title: High-power structured laser modes: direct generation of a vortex array
Authors: Chen, Y. F.
Ke, H. T.
Tseng, Y. C.
Hsieh, M. X.
Tung, J. C.
Hsieh, Y. H.
Liang, H. C.
Huang, K. F.
電子物理學系
Department of Electrophysics
Issue Date: 15-Jul-2020
Abstract: The frequency degeneracy induced by the astigmatism in a nearly hemispherical cavity is originally exploited to generate vortex array laser modes with the output power up to 300 mW. The inhomogeneous Helmholtz equation is employed to derive the wave function for manifesting the characteristics of the lasing modes. The theoretical wave function explicitly reveals the role of the Gouy phase in the formation of vortex arrays. Numerical analyses are further performed to confirm that the thermal lensing effect in the laser crystal assists the lasing transverse order to increase with increasing pump power. It is believed that the high efficiency enables the present laser modes to be useful in the applications of structured vortex beams. (C) 2020 Optical Society of America
URI: http://dx.doi.org/10.1364/OL.399251
http://hdl.handle.net/11536/155204
ISSN: 0146-9592
DOI: 10.1364/OL.399251
Journal: OPTICS LETTERS
Volume: 45
Issue: 14
Begin Page: 4096
End Page: 4099
Appears in Collections:Articles