Results 91 to 100 of about 868 (114)

Percutaneous laser discectomy with the Ho:YAG laser

Lasers in Surgery and Medicine, 1992
AbstractA prototype Ho:YAG (2.15 μm) laser operating at 2‐J/pulse, 3 Hz through a 600‐μm fiber was employed to perform laser discectomies at the L3–4 disc through an 18G needle in five juvenile pigs. No temperature elevations were recorded in the posterior longitudinal ligament at the disc level and all animals recovered fully with no adverse sequelae,
M R, Quigley, T, Shih, A, Elrifai, J C, Maroon, M L, Lesiecki   +4 more
openaire   +2 more sources

Directly diode-pumped high-energy Ho:YAG oscillator

Optics Letters, 2012
We report on the high-energy laser operation of an Ho:YAG oscillator resonantly pumped by a GaSb-based laser diode stack at 1.9 μm. The output energy was extracted from a compact plano-concave acousto-optically Q-switched resonator optimized for low repetition rates.
Samir, Lamrini, Philipp, Koopmann, Michael, Schäfer, Karsten, Scholle, Peter, Fuhrberg   +4 more
openaire   +2 more sources

Ho:YAG rod amplifier for vortex beams

2015 IEEE Photonics Conference (IPC), 2015
A Ho:YAG rod amplifier is demonstrated for vortex beams with orbital angular momentum. Simulations show nice correlation with experimental data and potentially high gain. This could be used for complex modes and spatial division multiplexing.
null Yuan Li, null Zeyu Zhang, J. Keith Miller, Eric Johnson   +3 more
openaire   +1 more source

High Average Power Ho:YAG Laser

Advanced Solid-State Photonics, 2007
27.4 W of average power in a beam with M2
openaire   +1 more source

Resonantly pumped Q-switched Ho:YAG laser

2011 International Quantum Electronics Conference (IQEC) and Conference on Lasers and Electro-Optics (CLEO) Pacific Rim incorporating the Australasian Conference on Optics, Lasers and Spectroscopy and the Australian Conference on Optical Fibre Technology, 2011
The Q-switched Ho:YAG hybrid laser resonantly pumped at the wavelength of 1908 nm was developed. For the best case of Q-switching regime the pulses of 127 kW peak power (2.8 mJ, 22 ns) were achieved at the repetition rate of 20 Hz.
J. Kwiatkowski, J. K. Jabczynski, W. Zendzian, J. Swiderski, L. Gorajek, M. Kaskow   +5 more
openaire   +1 more source

Performance of Ho:YAG as a function of temperature

Applied Optics, 1990
The performance of two multiply doped Ho:YAG lasers has been characterized as a function of the laser rod temperature. From the experimental results, the dependence of the slope efficiency and threshold on temperature has been extracted. Threshold can be correlated with the occupation of the lower laser level.
N P, Barnes, D J, Gettemy
openaire   +2 more sources

Endoscopic Lumbar Foraminotomy with Ho:Yag Laser

2021
Lumbar foraminal stenosis has been identified as a common cause of radicular symptoms and can lead to persistent pain after prolonged treatment. A facet-preserving microdecompression technique using a paraspinal approach has been considered the gold standard for the surgical treatment of lumbar foraminal or far lateral stenosis but has been associated ...
Han Joong Keum, Kang Seok Moon
openaire   +1 more source

High power cryogenically cooled Ho:YAG laser

2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017
High energy sources operating around 2 μm are of interest in applications such as LIDAR and material processing and have also been used effectively as pump sources for high-energy mid-lR non-linear conversion, an established approach for generating mid-IR lasers. Commonly used bulk laser materials are Ho:YLF and Ho:YAG. However, at room temperature the
Miftar Ganija, Alexander Hemming, Nikita Simakov, John Haub, Peter Veitch, Jesper Munch   +5 more
openaire   +1 more source

High-repetition-rate single-frequency Ho:YAG MOPA system

Applied Optics, 2018
A stable, 2.09 μm single-frequency Ho:YAG master oscillator and power amplifier (MOPA) system at a pulse repetition frequency of 1.25 kHz is demonstrated. The maximum output energy of the single-frequency injection-seeded laser is 13.76 mJ, and the corresponding pulse width is 178.9 ns.
Yixuan, Zhang, Chunqing, Gao, Qing, Wang, QuanXin, Na, Mingwei, Gao, Meng, Zhang, Shuai, Huang   +6 more
openaire   +2 more sources

Tm:glass laser pumping a Ho:YAG laser

SPIE Proceedings, 2003
ABSTRACT Lasers operating around 2.0 jm have several remote sensing applicationsincluding wind velocity, water vapor and green house gasses. An attractiveapproach to 2.0 m lasers has a Tm:glass fiber laser pumping a Ho:YAG laser,thereby avoiding problems that are associated with the Ho:Tm up conversionprocess.
Norman P. Barnes, Brian M. Walsh
openaire   +1 more source