Terahertz Sideband-tuned Quantum Cascade Laser Radiation; Journal article

摘要

A compact, tunable, narrowband terahertz source was demonstrated by mixing a single longitudinal mode 2.408 THz, free running quantum cascade laser with a 2-20 GHz microwave sweeper in a conventional corner-cube-mounted Schottky diode. The sideband spectra were characterized with a Fourier transform spectrometer, and the radiation was tuned through several D2O rotational transitions to estimate the longer term (t greater than or equal to several sec) bandwidth of the source. A spectral resolution of 2 MHz in CW regime was observed.