The lasing and photostability characteristics of Rhodamine 6G and Pyrromethene 567 dyes dispersed in polymeric host materials have been investigated as a function of the intensities of incident pump and signal beams in a longitudinally pumped dye laser in an oscillator–amplifier configuration. A substantial reduction in the rate of photodegradation was observed under lasing conditions and with increasing signal intensity in a dye amplifier, establishing that the service lives of these materials improve with an increase in the rate of stimulated emission. We observed ∼62% amplifier efficiency at 2 Hz operation and 10% reduction in amplifier efficiency at 10 Hz operation after exposure of 72,000 pulses by use of a Pyrromethene disk.
© 2005 Optical Society of America
Lasers and Laser Optics
Original Manuscript: May 10, 2005
Manuscript Accepted: June 7, 2005
Published: December 20, 2005
Vol. 1, Iss. 1 Virtual Journal for Biomedical Optics
Alok Kumar Ray, Sasi Kumar, Narayan Vitthal Mayekar, Sucharita Sinha, Soumitra Kundu, Subrata Chattopadhyay, and Kamalesh Dasgupta, "Role of the stimulated-emission rate in the photostability of solid-state dye lasers," Appl. Opt. 44, 7814-7822 (2005)