Results 111 to 120 of about 949 (162)
Some of the next articles are maybe not open access.
SPIE Proceedings, 1986
Recent performance of alexandrite single- and double-pass amplifiers is described. Amplification factors of 5x per pass are reported at pulse energies of several Joules/pulse and pulse powers exceeding 100 MW.
J. A. Pete +3 more
+4 more sources
Recent performance of alexandrite single- and double-pass amplifiers is described. Amplification factors of 5x per pass are reported at pulse energies of several Joules/pulse and pulse powers exceeding 100 MW.
J. A. Pete +3 more
+4 more sources
Intracorporeal lithotripsy with the Alexandrite laser
Lasers in Surgery and Medicine, 1997The objective of this study was to evaluate clinical use of an Alexandrite laser lithotripter for intracorporeal lithotripsy of urinary calculi.We prospectively evaluated a flash lamp pumped, Q-switched Alexandrite solid-state laser for use in conjunction with ureteroscopy (30 cases) or percutaneous nephrolithotripsy (2 cases).
J D, Denstedt +3 more
openaire +2 more sources
In vitro Lithotripsy with the Alexandrite Laser
European Urology, 1992The Alexandrite laser system has proven to be an effective and safe method of ureteral lithotripsy. Some authors have recently reported the risk of interspersion of fiber splinters into tissue during lithotripsy, when short pulses and high power densities are employed.
C, Pertusa +5 more
openaire +2 more sources
IEEE Journal of Quantum Electronics, 1980
Wavelength tunable laser operation has been obtained from the solid-state crystal alexandrite (BeAl 2 O 4 :Cr3+) over the continuous range from 701 to 818 nm. The tunable emission was observed at room temperature and above in a homogeneously broadened, vibronic, four-level mode of laser action. In this mode the laser gain cross section increases from 7
J. Walling +4 more
openaire +1 more source
Wavelength tunable laser operation has been obtained from the solid-state crystal alexandrite (BeAl 2 O 4 :Cr3+) over the continuous range from 701 to 818 nm. The tunable emission was observed at room temperature and above in a homogeneously broadened, vibronic, four-level mode of laser action. In this mode the laser gain cross section increases from 7
J. Walling +4 more
openaire +1 more source
Role of the alexandrite laser for removal of tattoos
Lasers in Surgery and Medicine, 1995AbstractBackground and Objective: The development of the Alexandrite laser for the removal of blue‐black tattoos is described.Study Design/Materials and Methods: The responses of an animal study, using professionally tattooed skin and a human study involving 22 (professional and nonprofessional) blue‐black tattoos, to the Alexandrite laser are reported.
T J, Stafford, R, Lizek, O T, Tan
openaire +2 more sources
Alexandrite laser pumped LiF:F2− laser
Optics Communications, 2001Abstract For the first time to our knowledge a direct alexandrite laser pumping of LiF:F 2 − crystals was suggested and realized by means of energy transfer from the F 3 − to the F 2 − color centers (CCs). Tunable laser oscillation of LiF:F 2 − in the 1000–1300 nm spectral range with a maximum efficiency of 10% was achieved.
S.B Mirov +5 more
openaire +1 more source
Alexandrite-laser performance at high temperature
Optics Letters, 1982The performance of a flash-pumped alexandrite laser operating in a long-pulse mode has been characterized at temperatures from 34 to 310 degrees C. Laser gain and efficiency increased monotonically up to 225 degrees C, with a peak pulse energy there more than four times the value at 34 degrees C.
S, Guch, C E, Jones
openaire +2 more sources
Alexandrite laser pumped by semiconductor lasers
Applied Physics Letters, 1990We report the first operation of a direct diode-pumped tunable chromium-doped solid-state laser. A small alexandrite (Cr:BeAl2O4) crystal was longitudinally pumped by two visible laser diodes. The threshold pump power was 12 mW using the R1 line at 680.4 nm for the pump transition, and the slope efficiency was 25%.
Richard Scheps +4 more
openaire +1 more source
Alexandrite Lasers And Their Applications
SPIE Proceedings, 1987Alexandrite lasers have been developed to meet the requirements of several important applications. A number of these lasers are described which show capabilities including high average power, high energy/pulse, narrow linewidth, and tunability. Other lasers with especially simple, conduction cooling are also described.
openaire +1 more source
Characteristics of alexandrite lasers
Conference on Lasers and Electro-Optics, 1981Alexandrite, BeAl2O4:Cr3+, is a tunable solid-state laser material similar in physical characteristics to ruby but which is capable of four-level vibronic lasing at and above room temperature. The lasing band extends from below 700 nm to over 800 nm and shows a marked dependence of gain on temperature.
openaire +1 more source