Spectroscopy and laser characteristics of copper-vapor-laser pumped pyrromethene-556 and pyrromethene-567 dye solutions

Yossi Assor, Zeev Burshtein, Salman Rosenwaks

Research output: Contribution to journalArticlepeer-review

Abstract

We measured the basic optical properties of Pyrromethene-567 (P567) and Pyrromethene-556 (P556) dye solutions that are relevant to their application as dye lasers. The fluorescence spectra of methanol solutions show mirror images in relation to the absorption spectra, with Stokes shifts of 29.5 and 37.5 nm, respectively, for the two dyes. The central fluorescence peaks were at 546 and 535 nm, with widths of ∼40 and ∼50 nm (FWHM). The quantum yields were 97% ± 5% and 78% ± 5% for P567 and P556, respectively. Fluorescence lifetimes of 6.0 ± 0.2 ns were obtained for both dyes in methanol. Laser action, obtained by pumping with the green emission line (510.6 nm) from a copper-vapor laser, was measured in a Hänsch-type cavity. Tunability ranged from 531 to 590 nm for P567 and from 522 to 590 nm for P556. Lasing thresholds were ∼0.27 and ∼0.16 mJ/pulse, with 25% and 27% slope efficiencies for P567 and P556, respectively. Spectroscopy and lasing were studied in other solvents as well.
Original languageEnglish GB
Pages (from-to)4914-4920
Number of pages7
JournalApplied Optics
Volume37
Issue number21
DOIs
StatePublished - 1998

Fingerprint

Dive into the research topics of 'Spectroscopy and laser characteristics of copper-vapor-laser pumped pyrromethene-556 and pyrromethene-567 dye solutions'. Together they form a unique fingerprint.

Cite this