Abstract
A chemical oxygen iodine laser (COIL) is an efficient laser which generates high power 1315nm light which is near minimum loss wavelength of transmission of the quartz optical fiber. The excited source of COIL are the O2(1Δ) molecules. The H2O vapor is a strong quencher of O2(1Δ), moleculestherefore it is necessary to remove it for efficient operation. A cold trap is generally used for this. The trap's temperature is very important. In this paper, the dependance of quenching rate of O2(1Δ) molecules upon the trap temperature is shown. The quenching rate decreases with the trap's temperature. However, the decreasing quenching rate begins to saturate at - 50°C, and it begins to increase under - 60°C.
