Tunable single-frequency diode laser at wavelength lambda = 1.645 microm for methane concentration measurements.
This paper deals with the development of a novel single-frequency tunable diode laser with fiber-optic output for gas-analysis applications. The approach we propose is a convenient, simple and cheap solution for spectroscopy of single absorption lines of any gases having absorption bands in the optical fiber transparency window (0.7 microm/1.7 microm). The presence of fiber-optic output is an additional advantage for remote sensing applications. The laser operation is demonstrated as applied to R7 line of 2 nu(3) methane absorption band at lambda = 1.645 microm. The mode-hop-free tuning range of 35 GHz (1.2 cm(-1)) has been achieved.
Gladyshev
A V
AV
Fiber Optics Research Center, General Physics Institute of the Russian Academy of Sciences, 38 Vavilov St., 119991 Moscow, Russia. alexglad@fo.gpi.ru
Belovolov
M I
MI
Vasiliev
S A
SA
Dianov
E M
EM
Medvedkov
O I
OI
Nadezhdinskii
A I
AI
Ershov
O V
OV
Beresin
A G
AG
Duraev
V P
VP
Nedelin
E T
ET
D007834:Lasers; D008697:Methane / Q000032:analysis*; D013057:Spectrum Analysis / Q000295:instrumentation
D008697:Methane