Solid-state laser with newly synthesized pigment

A yellow laser oscillation was obtained using a newly synthesized pigment. The compound used in this study is a derivative of 3,6-diphenylpyrrolo(3,4-c)pyrrole-1,4-dione. In the compound used, the phenyl groups are substituted by p-methylphenyl groups and the hydrogen atoms attached to the nitrogens by allyl groups. We prepared a 10-mum-thick thin polymethyl methacrylate (PMMA) film, into which we incorporated the pigment, around a 3-mm-diameter quartz rod. In this study we adopted the thin-film ring laser system in order to examine the laser action with the pigment. We pumped the pigment-doped PMMA thin film with the third-harmonic-generation (THG) produced by a pulsed Nd:YAG laser. The center wavelength of the laser oscillation was 575 nm. The threshold pump energy density was approximately 0.55 mJ/cm(2). (C) 2002 Elsevier Science Ltd. All rights reserved.