Journal ArticleDOI
Ultraviolet organic liquid lasers
H. Furumoto,H. Ceccon +1 more
TLDR
A flashlamp-excited organic liquid laser system capable of stimulated emission down to 340 nm in the ultraviolet has been developed in this article, which has a rise time of 50 ns and energy capacity of 20 joules or more.Abstract:
A flashlamp-excited organic liquid laser system capable of stimulated emission down to 340 nm in the ultraviolet has been developed. The flashlamp has a rise time of 50 ns and energy capacity of 20 joules or more. There are several efficient laser compounds that emit below 400 nm, and the most promising appears to be the p-terphenyl laser, which emits at 341 nm and is capable of running in the superradiant mode. There are several interesting facets still unexplained in ultraviolet lasers. The possibility of singlet to triplet intersystem crossings in substances generally accepted as having unity fluorescence quantum efficiency has been encountered.read more
Citations
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Journal ArticleDOI
Low-energy vibrational modes in phenylene oligomers studied by THz time-domain spectroscopy
Michael B. Johnston,Laura M. Herz,Amena L. T. Khan,Anna Köhler,Alexander Giles Davies,Edmund H. Linfield +5 more
TL;DR: In this paper, low-energy vibrational modes have been investigated in polycrystalline biphenyl, para-terphenyl and para-quaterphenyl using THz-TDS.
Patent
Copy-protected optical media and method of manufacture thereof
TL;DR: In this paper, a method for fabricating read-only copy protected optical medium comprising a light-sensitive material at positions capable of altering the data read during copying of the optical medium but permitting read of the underlying data in the reading of the medium is presented.
Journal ArticleDOI
Laser emission from an organic molecular crystal
TL;DR: A tunable organic crystal laser was described in this article, where platelets of fluorene containing 2 × 10−3 anthracene emitted polarized light pulses at 408 nm, with a pulse amplitude of 10 W and a pulse duration of ≦ 3 ns.
Journal ArticleDOI
Triplet extinction coefficients of some laser dyes. II
TL;DR: In this paper, the authors measured the triplet extinction coefficients eT over the laser action spectral region of DODC, DMC, Sulforhodamine B, Rhodamine 575, Coumarin 523, CouMARin 521, Cou MARIN 521 and BBO, and provided a simplified derivation of McClure's equation.
Journal ArticleDOI
Dependence of optical properties of oligo-para-phenylenes on torsional modes and chain length.
TL;DR: An adiabatic description of the dynamics of the S1 state might significantly simplify any dynamics simulations of torsional broadenings in para-phenylene oligomers constructed from two to eight aromatic rings.
References
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Journal ArticleDOI
The Theory and Practice of Scintillation Counting
J. B. Birks,F. W. K. Firk +1 more
Journal ArticleDOI
Continuously tunable, narrow‐band organic dye lasers
B. H. Soffer,B. B. McFarland +1 more
TL;DR: In this paper, the authors demonstrated efficient spectral narrowing and tunability over a wide spectral range, using diffraction gratings as cavity reflectors in solid and liquid organic dye lasers.
Journal ArticleDOI
Laser-pumped stimulated emission from organic dyes: experimental studies and analytical comparisons
TL;DR: In this article, the authors compared the stimulated emission spectra of two organic dyes, chloro-aluminum phthalocyanine (CAP) and 3,3′-diethylthiatricarbocyanines iodide (DTTC), using a giant-pulse ruby laser excitation.
Journal ArticleDOI
Flashlamp-excited organic dye lasers
TL;DR: In this paper, the effect of the triplet state on the critical inversion of a flashlamp-excited dye laser has been investigated in terms of the singlet state absorption and fluorescence and triplet-state absorption spectra.