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Solar-pumped Nd:YAG lasers are a promising renewable energy source for applications including the magnesium-hydrogen energy cycle, power beaming and satellite technologies [1]. The major issue that limits the performance of these lasers is the weak absorption of solar radiation due to the low overlap between the solar spectrum and the Nd:YAG absorption spectrum. The symmetry and homogeneity of this...
Over the past decade, the increasing potential of terahertz (THz) radiation has stimulated intensive efforts to develop efficient emitters based on the ionization of gases by ultrashort laser pulses [1]. In order to properly calibrate dedicated experiments, nonlinear propagation codes have to be particularly accurate to describe the low-frequency part of the pulse spectrum. Usually, solving full Maxwell...
The development of a compact, continuous wave (CW), room-temperature, broadly-tunable terahertz (THz) laser source is of great interest for a number of applications ranging from biomedical imaging and indoor communication to spectroscopy, security and defence. Among the usually used laser sources, direct quantum cascade lasers (QCLs) and semiconductor mixers of mid-IR QCLs are regarded as most popular...
Tunable lasers allow the emission wavelength λL to be adjusted within the gain bandwidth of the amplifying medium. Besides applications in telecommunications, tunable lasers are mostly employed in biophotonics for e.g. transmission and absorption measurements as well as in novel analysis methods such as RAMAN and CARS spectroscopy [1]. Based on broad spectral gain regions offering large tuning bandwidths,...
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