The two resonator channel dye laser system operating at two wavelengths and continuously variable polarizations is developed. The grazing incidence prism beam expander is multilayer anti-reflection coated for P-component, suppressing s-component. It is coupled with a Littrow mounted grating and these are as a whole rotative with respect to the resonator axis.
By rotating the P-plane of the rotative wavelength selector, the polarization of the resonance beam is made rotative continuously. As a intracavity beam divider, both a knife edge beam divider and a half mirror beam divider are used.
While the former has no power competition effect between the two wavelength outputs, the latter has significant power competition effect, which is dependent upon the two polarization cross angle.
In this experiment, both a low pressure and a T.E.A. N2 laser (-0.1MW) are used as a pumping source for the dye laser, and the dye used is $5\times10^{-3}$ mol solution of Rhodamine 6G in pure ethanol. The tuning range of Rhodamine 6G dye laser is found to be 5750Å-6100Å.
