Detection of CO in air by diode-pumped 4.6-microm difference-frequency generation in quasi-phase-matched LiNbO(3).
Detection of CO, N(2)O, and CO(2) in ambient air was performed with a room-temperature cw IR source based on difference-frequency generation in periodically poled LiNbO(3). The source was pumped by a seeded highpower GaAlAs amplif ier at 860 nm and a diode-pumped monolithic Nd:YAG ring laser at 1064 nm. The IR output was tunable between 2160 and 2320 cm(-1) without crystal rotation. The CO detection sensitivity is extrapolated to 5 ppb m/ radicalHz if limited by IR intensity noise.
Petrov
K P
KP
Goldberg
L
L
Burns
W K
WK
Curl
R F
RF
Tittel
F K
FK