Lasing behavior of sol-gel silica doped with UV laser dyes

1998 ◽  
Vol 66 (4) ◽  
pp. 427-430 ◽  
Author(s):  
K.S. Lam ◽  
D. Lo
Keyword(s):  
Sol Gel ◽  
Laser Dyes ◽  
Uv Laser

Improved Sol-Gel Materials for Efficient Solid State Dye Lasers

1993 ◽  
Vol 329 ◽  
Author(s):  
Michael Canva ◽  
Patrick Georges ◽  
Jean-Fran^ois Perelgritz ◽  
Alain Brun ◽  
Fréddric Chaput ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Tunable Lasers ◽  
Optical Quality ◽  
Dye Lasers ◽  
Laser Dyes ◽  
Host Matrix ◽  
Host Matrices

AbstractPhotoresistant laser dyes were trapped in silica based xerogel host matrices to obtain solid state tunable lasers. For this purpose very dense xerogel samples with improved chemical and physical properties were prepared at room temperature by the sol-gel technology. The as-prepared materials were polished to obtain optical quality surfaces and were used as new lasing media.Lasing action of such different dyes as rhodamine, perylene and pyrromethene doping dense sol-gel matrices was demonstrated. Efficiencies of 30 % or lifetimes of more than 100,000 shots were achieved with different new ≤dye dopant/host matrix≥ couples. Their different performances are reviewed and discussed.

scholarly journals New photostable UV laser dyes

1986 ◽  
Author(s):  
Monika Rinke ◽  
Hans Güsten
Keyword(s):  
Laser Dyes ◽  
Uv Laser

Advances in Dye-Doped Sol-Gel Lasers

1993 ◽  
Vol 329 ◽  
Author(s):  
B. Dunn ◽  
F. Nishida ◽  
R. Toda ◽  
J. I. Zink ◽  
T. H. Allik ◽  
...  
Keyword(s):  
Laser Field ◽  
Considerable Increase ◽  
Sol Gel ◽  
Laser Action ◽  
Tunable Laser ◽  
Laser Dyes ◽  
Dye Molecules ◽  
Solution Synthesis ◽  
Chemical Route ◽  
Sol Gel Process

AbstractThe sol-gel process is a solution synthesis technique which provides a low temperature chemical route for the preparation of rigid transparent matrices. A number of laser dyes have been incorporated in different sol-gel matrices and tunable laser action has been demonstrated with these materials. This paper extends the sol-gel laser field into two significant areas, infrared dyes and pyrromethenes. The work with the tricarbocyanine dyes shows the versatility of sol-gel chemistry as organic modifications produce a favorable environment for the dye molecules. The results with the pyrromethene system show a considerable increase in output energy and offer the promise of longer laser lifetimes.

Influence of Coumarin Dyes on the Laser Performance of Pyrromethene and Perylene Dyes Co-Doped into ORMOSILs

2007 ◽  
Vol 336-338 ◽  
pp. 574-576
Author(s):  
Hua Rong ◽  
Chun Fang Ye ◽  
Yu Yang ◽  
Guo Dong Qian ◽  
Zhi Yu Wang ◽  
...  
Keyword(s):  
Sol Gel ◽  
Laser Wavelength ◽  
Laser Dyes ◽  
Co Doping ◽  
Organically Modified Silicates ◽  
Sol Gel Process ◽  
Organically Modified ◽  
Transfer Mechanisms ◽  
Co Doped ◽  
Coumarin Dyes

Laser dyes perylene red (p-red) or pyrromethene 567 (p567) were co-doped with coumarin 440 (C440) or coumarin 500 (C500) into MTES- and VTES-derived organically modified silicates (ORMOSILs) by sol-gel process. The effects of coumarin dye concentration on the laser performances of p-red and p567 were investigated. The results from laser efficiency measurements illustrated that at optimized coumarin concentration, the slope efficiency of co-doped p-red increased by a factor of 2 while that of co-doped p567 increased marginally. It was also found that by co-doping coumarin, the laser wavelength of p-red blue shifted and the laser thresholds for p567 and p-red could be reduced. The energy transfer mechanisms involved were also discussed.

The Fast Sol-Gel Synthetic Route to Supported Glass Films: Synthetic Features, Scope, Applications and Mechanistic Studies

1992 ◽  
Vol 271 ◽  
Author(s):  
Y. Haruvy ◽  
S. E. Webber
Keyword(s):  
Second Harmonic ◽  
Sol Gel ◽  
Acid Catalyst ◽  
Laser Dyes ◽  
Synthetic Route ◽  
Nmr Studies ◽  
Guest Molecules ◽  
Surface Anchoring ◽  
High Concentrations ◽  
Glass Films

ABSTRACTThe fast sol-gel synthetic route to glass films is facilitated by a solvent-free reaction of trialkoxysilane monomers at 60–80°C and near-stoichiometric water-to-siloxane ratios. The viscous polymer formed within several minutes is spin-cast onto a support (typical thickness 10–25µm), cured within a few hours at 60–70°C or 10–40 min. under an intense electric field at room temperature, and can be characterized on the same day. Multi-layered glass-film assemblies of varying indices of refraction and a total thickness up to 80µm are prepared by the same fast process with slight modifications.Guest molecules such as laser dyes for 2D lasers and chromophores for second-harmonic-generation are incorporated into these glass films at high concentrations by direct addition to the reaction mixture. Their absorbance and fluorescence spectra are typical of monomeric chromophores up to concentrations of ∼10-2M. Crystallites that may appear at higher concentrations exhibit unusual polymorphism. The smoothness of such films enables surface anchoring of iso-environment photoactive molecules and investigation of their photophysics.29Si-NMR studies of the hydrolysis pattern in our acid-catalyzed fast sol-gel reaction prove that uniform hydrolysis of the monomer, necessary for a single-phase polymerization, is attained only when the hydrolysis is fast enough to become kinetically controlled, e.g. at elevated temperature or at high acid-concentration. Our reaction pattern and the data of others can be interpreted in terms of a single mechanism of hydrolysis in which two different rate-determining-steps can prevail, depending predominantly on the reactivity of the alkoxysilane and the ratio of the acid-catalyst to the (apparently-inert) proton-binding solvent.

scholarly journals Characterization of New Excimer Pumped UV Laser Dyes 3. P-Quinqui-, Sexi-, Octi- and Deciphenyls

1993 ◽  
Vol 13 (1) ◽  
pp. 19-28 ◽  
Author(s):  
C. J. Seliskar ◽  
D. A. Landis ◽  
J. M. Kauffman ◽  
M. A. Aziz ◽  
R. N. Steppel ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Laser Dyes ◽  
Uv Laser ◽  
Predictive Information ◽  
Good Linear ◽  
Phenyl Rings ◽  
Conversion Efficiencies ◽  
Linear Regressions

The spectroscopic and lasing characteristics of a series of 308 nm pumped p-oligophenylenes with five or more phenyl rings have been studied. Quantitative comparisons of the absorption spectra of these dyes with numerous other dyes in this class of compounds can be made by defining a parameter, theta, as the sum of the number of phenyl rings and the number of ring-bridges. Statistically good linear regressions result from the correlations of molar extinction with theta and from wavelength of absorbance with the reciprocal of theta. We find that these correlations provide good predictive information in deciding which dyes to attempt to synthesize for testing. The lasing characteristics of the dyes studied show that these dyes are amongst the best dyes in this class of dyes. Some of these dyes have exceptionally long lifetimes coupled with acceptable conversion efficiencies.

Sign in / Sign up

Export Citation Format

Share Document