Lasing Characteristics of Seventeen Visible-Wavelength Dyes Using a Coaxial-Flashlamp-Pumped Laser

Abstract

The performance and tuning characteristic of organic dye lasers were measured using commercially available coaxial flashlamps as the pumping source. Tuning by a diffraction grating permitted continuous coverage of the 4200-7500-A region at up to 0.6% tuned output energy efficiency. Preliminary results with a 600-J Marx-Bank coaxial laser at 4500 A show 1% efficiency and single-pass unsaturated gain greater than 20 at 4500 A.

Photoinitiated mediated transport of H3O+ and/or OH- across glycerol monooleate bilayers doped with magnesium octaethylporphyrin

“…The output energy is about 1 J in less than a microsecond when the laser capacitor is charged to 20 kV. The wavelength of the photolyzing flash, about 590 nm with a width at half height of -40 nm (Marling, et al, 1974), overlaps nicely with the 578-nm absorption band of MgOEP (Fuhrhop and Mauzerall, 1968).…”

Synthesis and Photophysical Characterizations of Thermal -Stable Naphthalene Benzimidazoles

“…1,8-Naphthalimide and bisnaphthalimide derivatives are promising anticancer agents [9,10], the sulfonated derivatives are good antiviral agents with selective in vitro activity against the human immunity deficiency virus, HIV-1 [11]. Due to their photo-physical and photo-chemical properties the 1,8-naphthalimide derivatives can be used as fluorescence dyes for solar energy collectors and photosynthesis under concentrated sunlight [12], fluorescent markers in biological cells [13] as well as laser active media [14][15][16]. Recently, naphthalimides have also found applications in organic thin film field-effect transistors (OFETs), integrated circuit, displays, memory cards, chemical and pressure sensors, smart price tags and labels [17].…”

Aggregation Characteristics of Laser Dye Rhodamine 6g in Aqueous Surfactant Solutions

“…Aggregation is pronounced in highly polar solvents like water and alcohol and restricts the use of these media, although they form ideal components for liquid dye lasers due to their high specific heat and constancy of thermo-optical properties (Tuccio and Strome, 1972). Xanthene dyes, of which Rhodamines form an important group (Peterson et af., 1970;Snarley and Schafer, 1969), have been in very active use as laser dyes.Rhodamines as a class of laser dyes are known for their high water solubilities, but this beneficial property has been marred by the detrimental formation of dimeric aggregates which impair the laser action (Marling et al, 1974). Different approaches adopted to circumvent the dimerization phenomenon include the use of solvents like hexafluoroisopropanol and N,N-dipropylacetamide (Tuccio et al, 1973), and the addition of surfactants as deaggregating agents (Tuccio and Strome, 1972;Marling et al, 1974;Alfano et al, 1973).…”