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Abstract
We present a design of a transversely pumped and powerful Ti:sapphire laser, suitable for laser remote sensing in the near infrared (NIR) spectrum. Examining multiple pump configurations revealed that transversal pumping of Ti:sapphire crystals with a Nd:YAG laser (532 nm) from one or two sides yields maximum output power. Together with an optimized bow-tie resonator setup, we were able to extract up to 3 W (30 mJ, 100 Hz) of narrowband NIR laser emission from a cuboid 50 mm long Ti:sapphire crystal. Beam quality and divergence were determined as $M_x^2 = 1.1$, $M_y^2 = 1.7$, ${\varphi _x} = 0.5\;{\rm mrad} $, and ${\varphi _y} = 0.8\;{\rm mrad} $. The spectral purity (seeded, ${P_{{\rm seed}}}\ge170\,{\unicode{x00B5} \rm W}$) was better than 99.8%. Additionally, we show a two-wavelength setup applicable to atmospheric water vapor lidar. The principle performance of this theory of operation suggests a good chance of scalability towards significantly enhanced power of future Ti:sapphire lasers.
© 2022 Optica Publishing Group
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Hannes Vogelmann, Johannes Speidel, Matthias Perfahl, and Thomas Trickl, "Transverse-pumping approach for a powerful single-mode Ti:sapphire laser for near infrared lidar applications: publisher’s note," Appl. Opt. 62, 1095-1095 (2023)https://opg.optica.org/ao/abstract.cfm?uri=ao-62-4-1095
9 January 2023: A correction was made to the captions of Figs. 5 and 6.
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