Applied Physics B

, 97:275

High-power non-astigmatic TEM00 and vortex mode generation in a compact bounce laser design

Article

DOI: 10.1007/s00340-009-3642-5

Cite this article as:
Chard, S.P., Shardlow, P.C. & Damzen, M.J. Appl. Phys. B (2009) 97: 275. doi:10.1007/s00340-009-3642-5

Abstract

A novel design of a diode-side-pumped bounce amplifier laser is described that can produce a high-power TEM00 mode and Laguerre–Gaussian (LG) vortex mode operation with high circularity and low astigmatism. The design utilises control of pump size and bounce angle such that the laser mode experiences substantially circular symmetric gain and spherical thermal lensing, in a highly compact fundamental mode resonator. In a simple plane–plane Nd:YVO4 laser resonator with no other optical components and total length of just 13.4 cm, highly circularised TEM00 operation is produced at wavelength 1064 nm, with 14.2 W of power and high beam quality M2<1.05. Stable Q-switched TEM00 operation is demonstrated up to 900 kHz and second harmonic power of 7.2 W at 532 nm is generated with conversion efficiency up to 64%. Minor modification of the design to exploit the spherical aberration of the thermal lens is shown to allow for generation of a doughnut-shaped LG vortex mode with average power 16.6 W, maintaining extremely low astigmatism. Q-switched operation of the vortex mode is accomplished up to 400 kHz. A detailed numerical thermal analysis of the amplifier design is performed and gives quantitative agreement with experimental results.

PACS

42.55.Xi 42.60.Da 42.60.Gd 

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.Photonics, The Blackett LaboratoryImperial College LondonLondonUK