Results 131 to 140 of about 949 (162)
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IEEE Journal of Quantum Electronics, 1980
Wavelength-tunable CW laser action has been obtained from solid-state alexandrite, BeAl 2 O 4 :Cr3+. Laser emission occurred between 744 and 788 nm with a maximum of 6.5 W observed at the 765 nm wavelength with 3 kW of mercury arc excitation.
J. Walling, O. Peterson, R. Morris
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Wavelength-tunable CW laser action has been obtained from solid-state alexandrite, BeAl 2 O 4 :Cr3+. Laser emission occurred between 744 and 788 nm with a maximum of 6.5 W observed at the 765 nm wavelength with 3 kW of mercury arc excitation.
J. Walling, O. Peterson, R. Morris
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Alexandrite-laser-pumped Cr^3+:LiSrAlF_6
Optics Letters, 1992Alexandrite pumping of Cr3+:LiSrAlF6 (Cr:LiSAF) is investigated by studying the most probable limiting parameters, including gain, optical damage, and heat load capacity. An alexandrite-pumped, 200-mJ, Q-switched Cr:LiSAF oscillator–amplifier has been demonstrated.
D J, Harter, J A, Squier, G A, Mourou
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Evaluation of alexandrite laser materials
Annual Meeting Optical Society of America, 1985Alexandrite for tunable lasers has been studied using optical and chemical techniques, including UV-visible spectroscopy, x-ray and electron microprobe, and chemical analysis. Material characteristics affect and limit laser performance and contribute to failure. Optical microscopy and SEM have been used to examine defects and banding.
S. C. Stotlar, L. B. Edgett
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Tuned alexandrite laser for dentistry
SPIE Proceedings, 1999For medical applications tunable solid state laser system emitting a visible light in a region from 710 to 775 nm was developed. Laser head of this system was composed of alexandrite crystal rod (4 mm in diameter, 90 mm of length), two dielectric mirrors and tuning element (dispersing prism or thin-film polarizer).
Jan Sulc +3 more
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Pulse stretching in an alexandrite laser
Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics (IEEE Cat. No.99CH37013), 2003Summary form only given. The idea of using an energy limiting process such as two photon absorption to increase the pulse duration of Q-switched lasers is not recent. We demonstrate that by using this idea it is possible to achieve pulse stretching on the order of microseconds in a Q-switched alexandrite laser (750 nm) using ZnSe as the two photon ...
P. Rambo +4 more
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Properties of Alexandrite Lasers
1985The properties of electrons and electronic states are well suited for storing energy to be emitted as laser radiation. However, as quantum mechanics dictates all bound electronic states have discrete energy. Tunable lasers must be obtained, therefore, by means of either free electron states or by modifying (modulating) the electronic Hamiltonian.
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Alexandrite Laser Propagation Experiments
SPIE Proceedings, 1989The alexandrite laser is a flashlamp pumped, solid state pulsed laser that utilizes the alexandrite crystal for the lasing medium with output radiation between 0.755 and 0.760 micron wavelengths. Since the alexandrite laser is relatively new, little work has been done to study the propagation effects at this wavelength. The U.S. Army Missile Command at
Robert D. Barber +4 more
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Use of the Alexandrite Laser for Treatment of Seborrheic Keratoses
Dermatologic Surgery, 2002Seborrheic karatoses are benign lesions that are easily irritated and often cosmetically objectionable. Liquid nitrogen cryotherapy and other surgical methods are useful in treating these lesions, but are difficult to tolerate in patients who have large numbers of lesions requiring treatment. The alexandrite laser was used in one patient to quickly and
Don, Mehrabi, Robert T, Brodell
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Advanced Alexandrite lasers and technology
Alexandrite has attracted great attention as a laser gain medium owing to its broad wavelength tunability in near infra-red (NIR) range and excellent properties. This work is aimed to develop new technologies of Alexandrite lasers to fulfill further needs of applications.openaire +1 more source