We demonstrate a high-average-power, single-longitudinal-mode, and tunable terahertz-wave (THz-wave) source based on difference frequency generation (DFG) in a MgO:LiNbO3 (MgO:LN) crystal. The DFG waves are generated using a pair of Yb-doped, pulsed fiber lasers with a master oscillator power fiber amplifier configuration. The average power of the THz-wave output reaches 1.35 mW at 1.0 THz (300 μm) at a linewidth of 7.2 GHz, and the tunability ranges from 0.34 to 1.25 THz under a pulse repetition frequency of 500 kHz. With this scheme, we constructed a compact THz-wave generation head for imaging applications. The combination of MgO:LN-DFG and the stable and robust fiber laser sources is highly promising for developing high-average-power THz-wave sources, particularly in the high-transmission sub-THz region. This approach may enable new applications of THz-wave spectroscopy in imaging and remote sensing.
Yoshio Wada, Takumi Satoh, Yasuhiro Higashi, and Yoshiharu Urata, "High-repetition-rate tunable narrowband terahertz-wave generation based on nonlinear frequency conversion pumped by dual fiber lasers in MgO:LiNbO3," Proc. SPIE 10531, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI, 1053107 (Presented at SPIE OPTO: January 29, 2018; Published: 23 February 2018); https://doi.org/10.1117/12.2287293.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the proceedings. They include the speaker's narration with video of the slides and animations. Most include full-text papers. Interactive, searchable transcripts and closed captioning are now available for 2018 presentations, with transcripts for prior recordings added daily.
Search our growing collection of more than 16,000 conference presentations, including many plenaries and keynotes.