It is observed that the efficiency of the DCM dye dissolved in ethylene gly
col benzyl alcohol can be enhanced if the dye is preheated at a temperature
of 150 degrees C. Peak powers as high as 1.5 W have been achieved with a s
ingle-mode ring dye laser at 640 nm when pumped by 9 W (all lines) from an
argon-ion laser. The wavelength region has been also extended beyond both e
nds of the tuning curve compared to a conventionally prepared DCM dye.