1.
Opt Lett
; 34(2): 172-4, 2009 Jan 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-19148245
RESUMO
A precision laser spectrometer for the detection of CO(2) isotopes is reported. The spectrometer measures the fundamental absorption signatures of (13)C and (12)C isotopes in CO(2) at 4.32 microm using a tunable mid-IR laser source based on difference-frequency generation. The spectrometer attains a precision of up to 0.02 per thousand for 150 s of averaging. An overall accuracy of 0.05 per thousand was obtained when sampling various calibrated reference gases.