Title :
Frequency Characterization of a Terahertz Quantum-Cascade Laser
Author :
Beverini, Nicolò ; Carelli, Giorgio ; Michele, AndreaDe ; Moretti, Augusto ; Mahler, Lukas ; Tredicucci, Alessandro ; Beere, Harvey E. ; Ritchie, David A.
Author_Institution :
Dipt. di Fisica, Univ. di Pisa
fDate :
4/1/2007 12:00:00 AM
Abstract :
In this paper, the frequency characteristics of a terahertz quantum-cascade laser (QCL) operating around 2.5-THz in the pulsed regime have been studied by means of a heterodyne detection by using an optically pumped molecular laser as the local oscillator. The absolute frequency of the QCL can be determined with an accuracy of 1 MHz due to the pulse-to-pulse jitter of the QCL. The frequency tunability as a function of the injection current of the QCL is estimated to be around +2 GHz/A
Keywords :
frequency measurement; heterodyne detection; laser variables measurement; semiconductor lasers; 2.5 THz; absolute frequency; frequency characterization; frequency tunability; heterodyne detection; injection current; optically pumped molecular laser; quantum-cascade laser; submillimeter-wave laser; Finite impulse response filter; Frequency; Laser excitation; Laser transitions; Laser tuning; Optical mixing; Optical pumping; Power lasers; Pump lasers; Quantum cascade lasers; Quantum-cascade laser (QCL); submillimeter-wave laser;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.891058
