Abstract

This article shows that the binary dye mixtures in biological tissues can be made to lase simultaneously. More importantly, the lasing intensity of the donor dye with respect to the acceptor dye is found to be strongly dependent on the type of biological tissues. This difference in the intensity of lasing emissions is attributed to the difference in the optical characteristic of tissues that affect the rate of energy transfer from the donor to the acceptor dyes. Because the transformations of normal to malignant tissue often accompany by a change in the optical characteristic, the relative intensity of the simultaneous lasing emissions of the dyes doped in the tissues could be potentially used to differentiate the malignant from the normal tissues in medical diagnosis.

© 1995 IEEE