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  • 2013 Conference on Lasers and Electro-Optics - International Quantum Electronics Conference
  • (Optica Publishing Group, 2013),
  • paper CA_6_3

Femtosecond pulse generation with Tm-doped sesquioxides

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Abstract

High-power ultrashort-pulse lasers that operate around 2μm spectral region are of particular interest in expanding access to broadband coherent source options for the mid-infrared spectral region. For example, such optical frequency comb generators can be utilized for real-time, high-sensitivity and high-resolution detection of absorption features of molecular species present in the so-called “molecular fingerprint” region. Amongst other potential implementations of 2-μm ultrafast lasers are free-space optical communications, high-harmonic generation, infrared pulsed laser ablation of polymer materials and surgery. Tm-doped crystalline gain media could offer an attractive route towards the development of high-power and efficient ultrashort-pulse lasers for the 2-µm spectral region as alternatives to fiber [1] or semiconductor thin disk laser [2] approaches for which only rather limited average powers have been reported to date. For such purposes, Tm-doped crystals having characteristic broadband and relatively homogeneous gain spectra extending beyond 2 µm (that avoid strong water absorption at λ≤1950 nm) are required. Additionally, such media should support efficient cross-relaxation processes in a Tm-Tm manifold for efficient conversion of the pump radiation at 800 nm to laser emission around 2 µm and, as more general requirement, they possess good thermo-mechanical properties.

© 2013 IEEE

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