Wedged Nd:YVO4 crystal for wavelength tuning of monolithic passively Q-switched picosecond microchip lasers

A. Marianovich1, S. Spiekermann1, M. Brendel2, P. Wessels1, J. Neumann1, M. Weyers2, and D. Kracht1

Published in:

Opt. Express, vol. 29, no. 13, pp. 19790-19795, doi:10.1364/OE.430870 (2021).

© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Abstract:

We present a monolithic integrated passively Q-switched sub-150 ps microchip laser at 1064 nm with a wedged Nd:YVO4 crystal operating up to a repetition rate of 1 MHz. The wedge enables to change the cavity length by a small amount to fine tune the spectral cavity mode position over the full gain bandwidth of Nd:YVO4 and hence to optimize the output power. This additional degree of freedom may be a suitable approach to increase the wafer scale mass production yield or also to simplify frequency tuning of CW single-frequency microchip lasers.

1 Laser Zentrum Hannover e.V. (LZH), Laser Development Department, Hollerithallee 8, 30419 Hannover, Germany
2 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik (FBH), Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany