Title :
Terahertz sideband-tuned quantum cascade laser radiation
Author :
Danylov, A.A. ; Waldman, Jerry ; Goyette, Thomas M. ; Coulombe, Michael J. ; Gatesman, Andrew J. ; Giles, Robert H. ; Li, Jin ; Goodhue, William D. ; Linden, Kurt J. ; Nixon, William E.
Author_Institution :
Submillimeter-Wave Technol. Lab., Univ. of Massachusetts Lowell, Lowell, MA
Abstract :
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 ges several sec) bandwidth of the source. A spectral resolution of 2 MHz in CW regime was observed.
Keywords :
Fourier transform spectra; Schottky diodes; deuterium compounds; microwave photonics; quantum cascade lasers; rotational states; submillimetre wave mixers; terahertz wave generation; D2O rotational transition; D2O; Fourier transform spectrometer; corner-cube-mounted Schottky diode; free running quantum cascade laser; frequency 2 GHz to 20 GHz; frequency 2.408 THz; longitudinal mode; microwave sweeper; narrowband terahertz source; sideband spectra; sideband-tuned quantum cascade laser radiation; Bandwidth; Frequency estimation; Laboratories; Pressure measurement; Pulse measurements; Pulsed power supplies; Quantum cascade lasers; Schottky diodes; Spectroscopy; Submillimeter wave technology;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665792
