We demonstrate the phase-locking of a 2.5 THz Quantum Cascade Laser (QCL) to an air-propagating, 6 octaves-spanning, THz Optical Frequency Comb Synthesizer (OFCS). We directly observe the beating signal using a commercial detector, therefore proving that this approach provides a mature metrological tool in the THz region. We show that only a small fraction (<;100 nW) of the radiation emitted from the QCL is sufficient to generate a beat-note suitable for the phase-lock to the comb. These results pave the way to metrological-grade THz applications, especially in view of QCLs operating at higher temperatures.
Phase-locking a THz quantum cascade laser to a THz comb through an all-optical beating / L. Consolino; S. Bartalini; P. Cancio; A. Taschin; P. Bartolini; M. Vitiello; A. Tredicucci; R. Torre; P. De Natale. - ELETTRONICO. - (2012), pp. 1-3. (Intervento presentato al convegno 37th International Conference on Infrared, Millimeter, and Terahertz Waves) [10.1109/IRMMW-THz.2012.6380253].
Phase-locking a THz quantum cascade laser to a THz comb through an all-optical beating
TASCHIN, ANDREA;BARTOLINI, PAOLO;TORRE, RENATO;
2012
Abstract
We demonstrate the phase-locking of a 2.5 THz Quantum Cascade Laser (QCL) to an air-propagating, 6 octaves-spanning, THz Optical Frequency Comb Synthesizer (OFCS). We directly observe the beating signal using a commercial detector, therefore proving that this approach provides a mature metrological tool in the THz region. We show that only a small fraction (<;100 nW) of the radiation emitted from the QCL is sufficient to generate a beat-note suitable for the phase-lock to the comb. These results pave the way to metrological-grade THz applications, especially in view of QCLs operating at higher temperatures.File | Dimensione | Formato | |
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