Triplet-extinction coefficients of some laser dyes. 1

Technical Report · Tue Feb 28 23:00:00 EST 1989

OSTI ID:5607928

Pavlopoulos, T G; Golich, D J

For flashlamp-pumped dye lasers, the negative effect of triplet-state losses on laser action efficiency is well known. Oscilloscope traces of laser pulses showed that laser action diminishes much sooner than the flashlamp excitation pulse. This effect was attributed to the buildup of triplet-state dye molecules during the excitation from the flashlamp pulse. Triplet-extinction coefficients epsilon(T) were measured over the laser-action spectral region of Rhodamine 6G; Rhodamine B; Rhodamine 110; Fluorol-7GA; Coumarin 540A; Coumarin 522; Coumarin 1; Coumarin 120; 4,4'-diphenyl stilbene; and 2,7-bis(4-methoxy-phenyl)-9,9-dipropylfluorene. The different lines from an argon-ion cw laser were employed for excitation. McClure's method was used to obtain the triplet extinction coefficients Epsilon(T). The method requires the measurement of triplet optical densities OD(T) as a function of different cw laser-excitation intensities (powers) I(ex). The importance of triplet-state losses on dye-laser efficiency is reviewed. The laser action properties of the laser dyes studied are briefly discussed as they relate to the measured epsilon=(T) values.

• Research Organization: Naval Ocean Systems Center, San Diego, CA (USA)
• OSTI ID: 5607928
• Report Number(s): AD-A-208291/5/XAB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMINES
ANTICOAGULANTS
CARBOXYLIC ACIDS
CHARGED PARTICLES
COUMARINS
DRUGS
DYE LASERS
DYES
EFFICIENCY
ENERGY-LEVEL TRANSITIONS
EXCITATION
HEMATOLOGIC AGENTS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
IONS
LASERS
LIQUID LASERS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PULSES
REAGENTS
RHODAMINES
SPECTRA