IMAGE AMPLIFICATION BY DYE LASERS

Abstract

Wide-angle high-gain image amplification has been achieved with several organic dye solution lasers. Rhodamine 6G, rhodamine B, or fluorescein disodium salt in ethanol, side pumped by a nitrogen laser, were used. With excitation pulses of 10−4 J and an active volume of about 1.3×0.1×0.1 mm3, a single-pass gain of 23 dB/mm and a diffraction-limited resolution of more than 104 distinguishable spots have been observed.