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Quasi-collinear type of acousto-optic (AO) diffraction by bulk acoustic waves (BAW) is widely used for high-resolution tunable optical filters and dispersive delay lines for ultrashort laser pulse shaping. Most often, quasi-collinear paratellurite (TeO2) AO filters are used due to high AO figure of merit of this material (V. Molchanov et al. Quant. Electron. 39:353, 2009). Lithium niobate (LN, LiNbO...
Numerical simulation of field-effect microwave high-electron-mobility transistors (HEMTs) based on GaN/AlN/AlGaN heterostructures are performed. The results of the study showed that the optimal thicknesses of the AlGaN barrier layer, allowing high microwave power implementation.
Acoustooptic (AO) light dispersive delay lines (LDDL) are widely used in high-power ultrashort laser pulse amplification chains for pulse shaping. The geometry of AO interaction of LDDL is determined mainly by the acoustic beam propagation and photoelastic properties of the crystal. Propagation of bulk acoustic wave (BAW) beams depends on acoustic anisotropy of the crystal and is characterized by...
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