Absolute frequency spectroscopy at 4.3 μm by direct referencing of a quantum-cascade-laser to an er: Fiber laser-based frequency-comb
Proceedings article published in 2011 by
A. Gambetta,
D. Gatti 
,
A. Castrillo ,
G. Galzerano,
P. Laporta,
L. Gianfrani ,
M. Marangoni
,
A. Castrillo ,
G. Galzerano,
P. Laporta,
L. Gianfrani ,
M. Marangoni
