High-beam-quality high-pulse-energy Er:YAP laser at 2.79 μm
Year: 2026
Type: article
Abstract: To achieve both high pulse energy and high beam quality from an erbium laser operating in the 3-μm waveband, an Er:YAP crystal with low phonon energy is employed as the gain medium, and the pulse energy of the fundamental mode is increased by grinding concave surfaces on both ends of the rod and designing a dynamically stable resonator with a large fundamental-mode volume. In addition, the resonator with joined stability zones is adopted to extend its thermally stable operating range. A pulse energy of 300 mJ with a beam quality factor of M 2 ≈ 2.4 is obtained at 2.79 μm with a pulse repetition rate of 50 Hz in free-running regime with a pulse duration of 300 μs, and the RMS instability of the pulse energy is measured to be 3.9%.
Source: Optics Express
DOI: 10.1364/oe.616003
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W7224094049