%0 Journal Article
%T Phase-locking of a 2.7-THz quantum cascade laser to a microwave reference
%A Khosropanah P.
%A Baryshev A.
%A Zhang W.
%A Jellema W.
%A Hovenier J.N.
%A Gao G.R.
%A Klapwijk T.M
%A Paveliev D.G.
%A Williams B.S.
%A Kumar S.
%A Hu Q.
%A Reno J.L.
%A Klein B.
%A Hesler J.L.
%J Optics Letters
%D 2009
%V 34
%F KhosropanahP._etal2009
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=966), last updated on Mon, 06 Jul 2015 15:25:01 -0500
%X We demonstrate the phase locking of a 2.7 THz metal–metal waveguide quantum cascade laser (QCL) to an external microwave signal. The reference is the 15th harmonic, generated by a semiconductor superlattice nonlinear device, of a signal at 182 GHz, which itself is generated by a multiplier chain (X

12) from amicrowave synthesizer at ~ 15 GHz. Both laser and reference radiations are coupled into a bolometer mixer, resulting in a beat signal, which is fed into a phase-lock loop. The spectral analysis of the beat signal con-firms that the QCL is phase locked. This result opens the possibility to extend heterodyne interferometers into the far-infrared range.
%P 2958-2960