Terahertz sideband-tuned quantum cascade laser radiation.
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 D(2)O rotational transitions to estimate the longer term (t > or = several sec) bandwidth of the source. A spectral resolution of 2 MHz in CW regime was observed.
Danylov
Andriy A
AA
Submillimeter-Wave Technology Laboratory, Dept. of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA. Andriy_Danylov@student.uml.edu
Waldman
Jerry
J
Goyette
Thomas M
TM
Gatesman
Andrew J
AJ
Giles
Robert H
RH
Li
Jin
J
Goodhue
William D
WD
Linden
Kurt J
KJ
Nixon
William E
WE
D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D008872:Microwaves; D011789:Quantum Theory; D013057:Spectrum Analysis / Q000379:methods*