Abstract

Some characteristics of selected laser dyes are reviewed, and the effect of heterocyclic atom substitutions on triplet (π, π*) transitions is studied experimentally. Specifically, the intensities (oscillator strengths f) of the lowest-energy singlet–singlet (S–S) and triplet–triplet (T–T) transitions of anthracene and some of its heterocyclic analogs were measured. It is shown that this type of substitution of carbon atoms by heteroatoms results in a considerable reduction of intensity of T–T transitions. This observation is important to laser dye technology. The effect is explained by the existence of an efficient vibronic coupling mechanism between (n, π*) and (π, π*) triplet states in heteroatom molecules. Some general guidelines for how to find efficient laser dyes are proposed.

© 1997 Optical Society of America

Laser dye spectroscopy of some pyrromethene-BF₂ complexes

Theodore G. Pavlopoulos, Joseph H. Boyer, Kannappan Thangaraj, Govindarao Sathyamoorthi, Mayur P. Shah, and Mou-Ling Soong
Appl. Opt. 31(33) 7089-7094 (1992)

Laser action from two dipyrrinone dyes under flash-lamp pumping

Theodore G. Pavlopoulos, David A. Lightner, and Justin O. Brower
Appl. Opt. 42(18) 3555-3557 (2003)

Photostability enhancement of Pyrromethene 567 and Perylene Orange in oxygen-free liquid and solid dye lasers

Mark D. Rahn, Terence A. King, Anthony A. Gorman, and Ian Hamblett
Appl. Opt. 36(24) 5862-5871 (1997)

Eight-position substitution effects on laser action of the 1,3,5,7-tetramethyl-2,6-diethyl pyrromethene-BF₂ complexes

Feng Liang, Heping Zeng, Zhenrong Sun, Yizhong Yuan, Zuguang Yao, and Zhizhan Xu
J. Opt. Soc. Am. B 18(12) 1841-1845 (2001)

High laser efficiency and photostability of pyrromethene dyes mediated by nonpolar solvent

Monika Gupta, Priyadarshini Kamble, M. C. Rath, D. B. Naik, and Alok K. Ray
Appl. Opt. 54(23) 7013-7019 (2015)