Free-running frequency stability of mid-infrared quantum cascade lasers.
The intrinsic frequency fluctuations of two single-mode quantum cascade (QC) distributed-feedback lasers operating continuously at a wavelength of 8.5 mum are reported. A Doppler-limited rovibrational resonance of nitrous oxide is used to transform the frequency noise into measurable intensity fluctuations. The QC lasers, along with recently improved current controllers, exhibit a free-running frequency stability of 150 kHz over a 15-ms time interval.
Myers
T L
TL
Williams
R M
RM
Taubman
M S
MS
Gmachl
C
C
Capasso
F
F
Sivco
D L
DL
Baillargeon
J N
JN
Cho
A Y
AY