Transverse-pumping approach for a powerful single-mode Ti:sapphire laser for near infrared lidar applications

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 yiel...

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Bibliographic Details
Published in:Applied optics (2004) 2022-10, Vol.61 (29), p.8553
Main Authors: Vogelmann, Hannes, Speidel, Johannes, Perfahl, Matthias, Trickl, Thomas
Format: Article
Language:English
Subjects:
Infrared lasers
Lidar
Narrowband
Near infrared radiation
Neodymium lasers
Remote sensing
Sapphire
Semiconductor lasers
Water vapor
YAG lasers
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Summary: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 , φ x = 0.5 m r a d , and φ y = 0.8 m r a d . The spectral purity (seeded, P s e e d ≥ 170 µ 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.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.463257