TY  - JOUR
AU  - Baryshev A.
AU  - Hovenier J.N.
AU  - Adam A.J.L.
AU  - Kašalynas I.
AU  - Gao J.R.
AU  - Klaassen T.O.
AU  - Williams B.S.
AU  - Kumar S.
AU  - Hu Q.
AU  - Reno J.L.
PY  - 2006
DA  - 2006//
TI  - Phase locking and spectral linewidth of a two-mode terahertz quantum cascade laser
JO  - Physics Letters
VL  - 89
AB  - We have studied the phase locking and spectral linewidth of an ~ 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 ~ 6.3 kHz. Power dependent measurements suggest that this linewidth does not approach the Schawlow-Townes limit.
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=967), last updated on Mon, 06 Jul 2015 15:57:13 -0500
ID  - BaryshevA._etal2006
ER  -