Table of Contents
Laser Chemistry
Volume 10, Issue 4, Pages 259-263

Some Novel Infrared Laser Dyes of Superior Photostability Tunable From 1.30 to 1.52 µm

1East China University of Chemical Technology, Shanghai, China
2Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai, China

Received 11 October 1989

Copyright © 1990 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Three new heptamethine pyrylium dyes containing a disubstituted amino group on the meso position in their bridged chain were investigated. The solutions of the dyes in 1,2-dichloroethane (DCE) of concentration ca. 10-3 M act as laser dyes transversely pumped by a Q-switched Nd:YAG laser as a pumping source. 5.6 to 9.6% of the pump energy was converted to an intense infrared pulse with frequencies between 6580 cm-1 (1.52 µm) and 7690 cm-1 (1.30/µm). The relation between lasing efficiency and dye concentration was also studied. These dyes show a remarkable photostability upon 1.06 µm laser excitation and excellent storage stability without degassing.