High-Power, Ultra-Broadband THz Generation in Organic Crystal MNA

We present a THz-TDS operating with a high source average power of 4.4 mW at 400 kHz repetition rate, with a broad bandwidth of more than 10 THz, detected using the organic crystal 2-amino-5-nitrotoluene MNA as generation and detection crystals. The pump laser is an industrial Yb-based laser system, temporally compressed to a pulse duration of 35 fs. An optical-to-THz conversion efficiency of 0.08% is achieved.