Title :
Phase-locking of a 3.4-THz Quantum Cascade Laser using a harmonic super-lattice mixer
Author :
Khudchenko, A.V. ; Hayton, Darren J. ; Pavelyev, D.G. ; Hovenier, J.N. ; Baryshev, A.M. ; Gao, J.R. ; Kao, T.-Y. ; Hu, Qin ; Reno, John L. ; Vaks, V.L.
Author_Institution :
SRON The Netherlands Inst. for Space Res., Netherlands
Abstract :
We report on a phase locking experiment of a 3.4 THz Quantum Cascade Laser (QCL) by using only room temperature electronics. A super-lattice harmonic mixer was used to produce a bit signal between the QCL signal and the 18th harmonic of a 190 GHz reference generator. The beat signal more than 30 dB above the noise level for 1 MHz RBW was observed. Such a signal to noise ratio was sufficient to provide high quality phase-locking and synchronize to a microwave reference up to 99% of the emitted QCL power.
Keywords :
quantum cascade lasers; semiconductor superlattices; submillimetre wave mixers; beat signal; frequency 190 GHz; frequency 3.4 THz; harmonic superlattice mixer; phase locking; quantum cascade laser; reference generator; signal to noise ratio; temperature 293 K to 298 K; Educational institutions; Harmonic analysis; Microwave oscillators; Mixers; Noise level; Quantum cascade lasers; Signal to noise ratio;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665477
