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Generated THz average power based single-pass DFG for different bonded QPM-GaP crystals. Insert: pictures for single layer GaP and bonded 2-layer, 4 layer and 13-layer QPM-GaP crystals.
Experimental setup for cavity enhanced difference frequency THz generation. , cavity coupler; , cavity curved mirrors; , dielectric mirror; PD, photodiode detector; S-POL, S polarization direction; P-POL, P-polarization direction; PBS, polarization beam splitter/combiner.
Cavity enhanced THz power, single-pass THz power (multiplied by 50) and cavity enhancement factor for two and four layers of QPM-GaP crystals when using the fixed fiber laser pulse energy of and different pulse widths.
Cavity enhanced and single pass THz power vs pump pulse energy when using pulse width 80 ns at 20 kHz repletion rate.
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