Results 261 to 270 of about 138,810 (343)
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Vitreolysis With the Q-Switched Laser
Archives of Ophthalmology, 1985We present an overview concerning the current status of photodisruptive methods used in the treatment of pathologic changes in the vitreous space. In one series of 320 cases studied, 65% of the planned dissections of pathologic structures were successful. In a second series of 34 more complicated cases, the success rate was even lower.
F, Fankhauser +2 more
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All-fiber periodically Q-switched laser
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007A short linear cavity erbium fiber laser is adapted to become a Q-switched laser by using a new and simple loss switching technique. The technique utilizes the inherent flexibility of optical fiber to rapidly drive the fiber end in and out of alignment with a cavity mirror, creating the conditions necessary for Q-switching.
Matthew T, Fellew, Graham E, Town
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Q-switched 1329 nm Nd:CNGG laser
Applied Optics, 2015We demonstrate a laser-diode-pumped Q-switched 1329 nm neodymium-doped calcium-niobium-gallium-garnet (Nd:CNGG) laser using a V:YAG crystal as a saturable absorber. An average output power of 353 mW and a repetition rate of 13.43 kHz for Q-switched pulses were obtained. The pulse width was from 124 to 151.4 ns under different pump powers.
Kun, Xiao +7 more
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Self-Q-switched Nd:YVO_4 microchip lasers
Optics Letters, 1998We have observed giant pulses from cw pumped, monolithic Nd:YVO(4) microchip lasers, several hundred times the cw level, with pulse lengths less than 2 ns, which cannot be accounted for by conventional gain switching. These pulses occur as the second longitudinal mode starts to oscillate and can be described by the inclusion of gain-related effects in ...
R S, Conroy +4 more
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Electrooptically Q-switched CO_2 waveguide laser
Applied Optics, 1979A flowing-gas CO(2) waveguide laser whose cw output is 13 W has been electrooptically Q-switched repetitively at rates up to 108 kHz and, with a 20% duty cycle, up to 345 kHz. To extract power efficiently in the Q-switched mode, it is necessary to operate the laser at far higher pulse repetition frequencies than for low-pressure lasers.
S, Marcus, G M, Carter
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Optik, 2020
Abstract In this paper, the self-Q-switched Nd:GGG laser at 1061 nm was demonstrated. The self-Q-switched pulses were obtained by adjusting the output coupler. Under pump power of 2.1 W, the output power of 89.5 mW and pulse energy of 1.83 μJ was obtained with 1.5% output coupler, the corresponding pulse width was 4.8 μs with a repetition rate of 48 ...
H.L. Bai +4 more
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Abstract In this paper, the self-Q-switched Nd:GGG laser at 1061 nm was demonstrated. The self-Q-switched pulses were obtained by adjusting the output coupler. Under pump power of 2.1 W, the output power of 89.5 mW and pulse energy of 1.83 μJ was obtained with 1.5% output coupler, the corresponding pulse width was 4.8 μs with a repetition rate of 48 ...
H.L. Bai +4 more
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Semiconducting polymer dots as broadband saturable absorbers for Q-switched fiber lasers
Journal of Materials Chemistry C, 2020A benzobisthiadiazole-based Pdot was successfully developed as a broadband SA for Q-switched fiber lasers at 1, 1.5, and 2 μm.
Haobin Chen +6 more
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SPIE Proceedings, 1990
One of the most attractive features of fibre lasers is their ability to produce significant pulse powers when Q-switched. Potential applications for such lasers include non-linear switching, OTDR measurements, materials processing and range-finding. We have, already demonstrated 100W:15ns pulses from a diode pumped Nd3+ fibre-laser and have obtained ...
Bill Barnes +4 more
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One of the most attractive features of fibre lasers is their ability to produce significant pulse powers when Q-switched. Potential applications for such lasers include non-linear switching, OTDR measurements, materials processing and range-finding. We have, already demonstrated 100W:15ns pulses from a diode pumped Nd3+ fibre-laser and have obtained ...
Bill Barnes +4 more
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Q-switching of semiconductor lasers
IEEE Journal of Quantum Electronics, 1977A scheme for Q -switching semiconductor lasers is proposed and analyzed. The method is based upon electrooptic switching of the Bragg reflectivity of the grating reflectors forming the cavity of the semiconductor laser. The basic configuration, the operating principles, and the dynamic behavior of these lasers are described.
T. Tsukada, null Chung Tang
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Q-switched semiconductor diode lasers
IEEE Journal of Quantum Electronics, 1983Diode lasers with an intracavity electroabsorption modulator have been operated with full on/off modulation at rates of 3 GHz. In addition, modulation of the lasers has been shown up to a detector-limited frequency of 6 GHz. A new model of these devices, which includes amplified spontaneous emission and high gain is developed in this paper.
D. Tsang, J. Walpole
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