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2 December 2021 Detailed study on optical properties of Li2B4O7 for down-conversion to millimeter waves
Dmitry M. Ezhov, Nazar A. Nikolaev, Alexander A. Mamrashev, Yury M. Andreev
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Proceedings Volume 12086, XV International Conference on Pulsed Lasers and Laser Applications; 1208626 (2021) https://doi.org/10.1117/12.2612528
Event: XV International Conference on Pulsed Lasers and Laser Applications, 2021, Tomsk, Russian Federation
Abstract
Optical properties of single axes Li2B4O7 (LB4) crystal are defined at room temperature in the spectral range 0.03˗0.5 THz. Dispersion of the refractive index components are approximated in the form of Sellmeier equations. Dispersion properties were used to determine phase-matching conditions for THz wave generation by collinear difference frequency generation processes. To the damage threshold under the pump by train of hundreds of 60 fs pulses of Ti:sapphire laser operating at 950 nm is found to be 250 TW/cm2, as well as the coherence length and efficiency of all possible types of three wave interactions are defined.
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Dmitry M. Ezhov, Nazar A. Nikolaev, Alexander A. Mamrashev, and Yury M. Andreev "Detailed study on optical properties of Li2B4O7 for down-conversion to millimeter waves", Proc. SPIE 12086, XV International Conference on Pulsed Lasers and Laser Applications, 1208626 (2 December 2021); https://doi.org/10.1117/12.2612528
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KEYWORDS
Terahertz radiation
Absorption
Nonlinear crystals
Optical properties
Frequency conversion
Laser damage threshold
Refractive index
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