Flashlamp-Pumped Organic-Dye Lasers

Abstract

The results of recent theoretical and experimental studies on flashlamp-pumped organic-dye lasers are presented. The importance of rapid pumping is considered in detail. Constructional aspects of a suitable flashlamp assembly are given, and lasing characteristics of various organic dyes excited by this lamp are summarized.

Temporal response of optically pumped organic semiconductor lasers and its implication for reaching threshold under electrical excitation

“…3,6 In previous efforts to study the intrinsic losses of OSLs, continuous wave ͑CW͒ and quasi-CW optical pumpings above threshold were attempted, but lasing was not observed. 3 This may be due to triplet excited-state absorption, as in the case of liquid dye lasers; 7,8 however, the solid state of OSLs complicates this issue since exciton annihilation processes may be more efficient. 4,5 Examining the boundary between pulsed and CW lasing thus presents a unique opportunity for studying fundamental losses in organic semiconductors.…”

“…Host triplet quenching of laser emission proceeds either via increased cavity loss from triplet-triplet absorption, as in liquid dye lasers, 8 or by guest singlet-host triplet annihilation ͑STA͒. In this case, singlet donors transfer their energy to triplet acceptors through dipole-dipole coupling.…”

Rare‐earth Liquid Lasers*

“…The emission spectra of Nd3+ in glass, calcium tungstate, and SeOC12 are illustrated in FIGURE 1. A comparison of these shows that the line width and structure of the spectrum of Nd3+ in the liquid is intermediate between those in the glass and in the crystal.…”

Scintillator and dye lasers in the range 350 to 600 nm pumped by a 200 kW nitrogen laser

“…Laser action has been reported in a variety of dyes and scintillators and has been obtained by pumping with either flashlamps, ruby lasers or harmonics of solid state lasers [1][2][3]. The application of the N~-laser as a pumping source for dye lasers has been reported by Abakumov et al [4] and by Lidholt [5].…”