Work

Multi-watt QCW operation of Fe:ZnSe laser at 4.1 μ m

Year: 2025

Type: article

Abstract: This study reports on the realisation of multi-watt QCW laser operation of a Fe:ZnSe laser under cryogenic conditions at 77 K. The Fe:ZnSe gain medium was longitudinally pumped by a high-power, compact diode-pumped solid-state (DPSS) Er:YAG laser emitting at 2.94 μ m. The resulting laser system, characterized by its compact and efficient design, achieved an output power of up to 16.3 W at 4.1 μ m with a maximum slope efficiency of 45% with respect to incident power. These results highlight the feasibility and strong potential of Fe:ZnSe lasers for high-power mid-infrared applications, particularly in contexts where compactness, efficiency, and cryogenic operation are practical or advantageous.

Source: Infrared Physics & Technology

DOI: 10.1016/j.infrared.2025.106213

Authors: Richard Švejkar, Jan Šulc, Adam Říha, Helena Jelínková

Institution: Czech Technical University in Prague

Language: English

Topic: Solid State Laser Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,000

Funder: Grantová Agentura České Republiky