Spatial hole burning in thin-disk lasers and twisted-mode operation
Karsten Schuhmann, Klaus Kirch, Francois Nez, Gunther Wichmann,, Randolf Pohl, Aldo Antognini
TL;DR
This paper investigates spatial hole burning in thin-disk lasers and proposes a twisted-mode scheme with a multi-order quarter-wave plate and polarizer to suppress it, enabling efficient single-frequency operation.
Contribution
It introduces a novel twisted-mode scheme that effectively suppresses spatial hole burning in thin-disk lasers, facilitating single-frequency operation.
Findings
Twisted-mode scheme significantly reduces spatial hole burning.
The scheme enhances wavelength selectivity for single-frequency operation.
Almost complete suppression of spatial hole burning achieved.
Abstract
Spatial hole burning prevents single-frequency operation of thin-disk lasers when the thin disk is used as a folding mirror. We present an evaluation of the saturation effects in the disk for disks acting as end-mirrors and as folding-mirrors explaining one of the main obstacles towards single-frequency operation. It is shown that a twisted-mode scheme based on a multi-order quarter-wave plate combined with a polarizer provides an almost complete suppression of spatial hole burning and creates an additional wavelength selectivity that enforces efficient single-frequency operation.
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