Intracavity absorber effects in a CW dye laser
Abstract
The technique of dye laser intracavity absorption was studied as a possible method of detecting small densities of atoms and molecules in combustion systems. Two types of phenomena were observed. Absorption signals, which, although of complex line shape, result in a decrease in laser intensity at the absorption wavelength are observed over a wide range of absorber densities. At values of the pump laser power above a certain threshold an enhancement effect is observed in which the dye laser spectrally condenses at the absorber wavelength. The enhancement effect allows the detection of very low densities of sodium with good signal to noise ratio. The data obtained to date are discussed.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- February 1979
- Bibcode:
- 1979STIN...8023647B
- Keywords:
-
- Absorbers (Materials);
- Continuous Wave Lasers;
- Dye Lasers;
- Laser Cavities;
- Tunable Lasers;
- Argon Lasers;
- Atom Concentration;
- Combustion;
- Laser Pumping;
- Molecules;
- Signal To Noise Ratios;
- Lasers and Masers