@Article{BaryshevA._etal2006,
author="Baryshev A.
and Hovenier J.N.
and Adam A.J.L.
and Ka{\v{s}}alynas I.
and Gao J.R.
and Klaassen T.O.
and Williams B.S.
and Kumar S.
and Hu Q.
and Reno J.L.",
title="Phase locking and spectral linewidth of a two-mode terahertz quantum cascade laser",
journal="Physics Letters",
year="2006",
volume="89",
abstract="We have studied the phase locking and spectral linewidth of an {\textasciitilde} 2.7 THz quantum cascade laser by mixing its two lateral lasing modes. The beat signal at about 8 GHz is compared with a microwave eference by applying conventional phase lock loop circuitry with feedback to the laser bias current. Phase locking has been demonstrated, resulting in a narrow beat linewidth of less than 10 Hz. Under requency stabilization we find that the terahertz line profile is essentially Lorentzian with a minimum linewidth of {\textasciitilde} 6.3 kHz. Power dependent measurements suggest that this linewidth does not approach the Schawlow-Townes limit.",
optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=967), last updated on Mon, 06 Jul 2015 15:57:13 -0500"
}