Sensitive detection of acetylene absorption in the visible by using a stabilized AlGaAs diode laser
Abstract
Overtone transitions of C2H2 at 789 nm are investigated by means of an AlGaAs laser operating in an external optical cavity configuration. Relative amplitude noise is of a few parts per million (ppm) and permits an absorption detection limit of 0.2 ppm/km. Self-broadening and air broadening is measured for two components of the observed band (P(11) at 12646.966 and R(5) at 12688.699/cm).
- Publication:
-
Applied Optics
- Pub Date:
- January 1993
- DOI:
- 10.1364/AO.32.000259
- Bibcode:
- 1993ApOpt..32..259P
- Keywords:
-
- Acetylene;
- Aluminum Gallium Arsenide Lasers;
- Laser Stability;
- Molecular Absorption;
- Laser Cavities;
- Semiconductor Diodes;
- Lasers and Masers;
- ABSORPTION;
- LASERS: SEMICONDUCTOR;
- SPECTROSCOPY: MOLECULAR;
- NONLINEAR OPTICS IN FIBERS