Perylene Orange Research Articles

The influence of oscillator configurations on performance of solid-state dye laser medium prepared by a new mould fabrication technique

A new mould fabrication technique was developed to dope laser dyes, such as rhodamine B, rhodamine 6G, pyrromethene 567 and perylene orange, into TEOS/GPTMS- and GPTMS-derived organically modified silicates (ORMOSILs) to obtain solid-state dye laser media. Longitudinally pumped solid-state dye lasers were established with Q-switch Nd:YAG laser source. The influence of various coating and reflectivity of output mirror on the laser performances of rhodamine B doped in GPTMS-derived ORMOSILs were studied in such experimental setups under the pump fluency of 0.55 J/cm 2 and a pump repetition rate of 1 Hz. The mould fabrication technique was discussed in details.

Influence of the thickness and composition of the solid-state dye laser media on the laser properties

Abstract In this work, pyrromethene 567, perylene orange and perylene red doped in MTES- and VTES-derived organically modified silicates (ORMOSILs) monolith with various sample thickness, up to 16 mm, were prepared. Their laser performances including slope efficiency, threshold and longevity were studied. The results illustrated that progress could be made on the longevity of solid-state dye laser by increasing the thickness of the monolith. Under the pump intensity of 0.1 J/cm 2 at the repetition rate of 2 Hz, the output energy of perylene orange doped in VTES-derived ORMOSIL monolith decreased to 50% of its initial value after 78 000 pulses. Under the same experimental conditions, the pyrromethene 567 doped in MTES-derived ORMOSIL monolith shot 106 000 pulses with an output reduction of less than 15%. The tunable ranges of these samples were also obtained.

High-performance solid-state dye laser based on peryleneorange-doped polycom glass

The new laser dye, perylene orange, doped into polycom glass (sol–gel glass–poly(methyl methacrylate) composite) has been developed into a tunable gain material with high performance. A sample polished to 0.02 μm smoothness and λ/5 flatness, over the central region, was excited in an optical cavity with a second harmonic Q-switched Nd-doped yttrium aluminium garnet laser as a pump source. The solid-state dye laser had a threshold of 53 μJ, a slope efficiency of 72% and a normalized photostability of 50 GJ mol−1. The laser damage thresholds of various host materials were obtained and the damage threshold of polycom glass was found to be 26 J cm−2. The beam profile of a He‒Ne laser transmitted through samples of host material showed that the optical homogeneity of polycom glass is approaching that of pure polymers.

High-performance solid-state dye laser based on perylene-orange-doped polycom glass

The ne laser dye, perylene orange, doped into polycom glass (sol-gel glass-poly(methyl methacrylate) composite) has been developed into a tunable gain material ith high performance.,A sample polished to 0.02μm smoothness and λ/5 flatness, over the central region, as excited in an optical cavity with a second harmonic Q-switched Nd-doped yttrium aluminium garnet laser as a pump source. The solid-state dye laser had a threshold of 53 μJ, a slope efficiency of 72%, and a normalized photostability of 50 GJ mol -1 The laser damage thresholds of various host materials were obtained and the damage threshold of polycom glass was found to be 26 J cm -2 . The beam profile of a He-Ne laser transmitted through samples of host material showed that the optical homogeneity of polycom glass is approaching that of pure polymers.

Photostability enhancement of Pyrromethene 567 and Perylene Orange in oxygen-free liquid and solid dye lasers

We investigated the effect of oxygen on the photostability of the laser dyes Pyrromethene 567, Perylene Orange, and Rhodamine 590 by determining their longevity of laser operation when pumped by the second harmonic of aQ -switched Nd:YAG laser. In solution, dissolved oxygen accelerated the photodegradation of Pyrromethene 567 and Perylene Orange but not Rhodamine 590. The photostability of Pyrromethene 567 was also found to be dependent on the solvent and on the lifetime of singlet oxygen. Deoxygenated Pyrromethene 567 doped polycom glass and modified poly(methyl methacrylate) (MPMMA) samples were tested for longevity of laser operation. A factor of 6 improvement in photostability was found for Pyrromethene 567 in MPMMA upon deoxygenation, and the total absorbed energy per mole of dye molecules to one-half output pulse energy was 36 GJ mol-1 .

Enhanced photostability of dye molecules trapped in solid xerogel matrices

A quantitative study of the photostability of dye molecules, trapped in transparent solid matrices synthesized by the sol-gel technique and diluted in solutions, was carried out by measuring the average number B of photons that the dye molecules can absorb before getting bleached. The investigated dye molecules were: Perylene Red, Perylene Orange, Pyrromethenes 567 and 597, Rhodamines 6G and B, DMC, a xanthylium salt and Neon Red. Values of B from 10 3 to 10 9 were measured. We show that the photostability was largely enhanced when the molecules were trapped in solid matrices. The dye-doped matrices were used as gain media in pulsed lasers to see the influence of the photostability of the molecules on their degradation in this common application: other bleaching processes were then revealed.

Photostability of dye molecules trapped in solid matrices

The photostability of dye molecules trapped in transparent solid matrices synthesized by the solgel technique was studied both experimentally and theoretically using a model with numerical and approximate analytical solutions. The model is based on a one-photon photodestruction process with the creation of an absorbing bleached molecule. We give the number of photons that different trapped dye molecules can absorb on average before they are bleached. Dyes such as Perylene Red, Perylene Orange, Pyrromethenes 567 and 597, Rhodamines 6G and B, DCM, a Xanthylium salt, and Neon Red were investigated; significant differences were observed. Some dye molecules in solvents were also studied; increased stability resulted when the molecules were trapped in solid matrices.

Comparison of laser performance of dye molecules in sol-gel, polycom, ormosil, and poly(methyl methacrylate) host media

Laser performance is described for Rhodamine 590, Pyrromethene 567, Perylene red, and Perylene orange in inorganic porous sol-gel glass, poly(methyl methacrylate)(PMMA), a composite of porous sol-gel glass with PMMA and organically modified silicate ormosil glass. Lasers were excited with a flash-lamp-pumped dye laser in the long-pulse-length regime (3 µs, 506 nm, 300 mJ) and a second-harmonic Nd:YAG laser in the short-pulse-length regime (6 or 15 ns, 532 nm, 60 mJ). The feasibility of long-pulse-length operation is demonstrated, detailed characteristics of short-pulse operation are described, and laser damage measurements are given. The nonpolar perylene dyes had better performance in partially organic hosts, and the ionic rhodamine and pyrromethene dyes performed best in the inorganic sol-gel glass host.