Results 1 to 10 of about 868 (114)

High power cryogenic Ho:YAG laser

Optics Express, 2017
We have improved significantly the brightness of cryogenic Ho:YAG, reporting up to 65 W output power with a beam quality of M2
Ganija, M., Hemming, A., Simakov, N., Boyd, K., Haub, J., Veitch, P., Munch, J.   +6 more
openaire   +3 more sources

Bone ablation using a Ho:YAG laser

Current Directions in Biomedical Engineering, 2022
Abstract This study aimed to optimize the ablation depth and duration at a fixed energy using a Ho:YAG laser, considering fiber delivery applications. According to the measurements performed with an optical coherence tomography system, we obtained depths of about 1.4 mm with 500 mJ/pulse applied energy when moving the laser along a 1 cm ...
Cetin Cigdem, Drusová Sandra, Hamidi Arsham, Rauter Georg, Cattin Philippe, Zam Azhar, Canbaz Ferda   +6 more
openaire   +2 more sources

Ablation of porcine ligamentum flavum with Ho:YAG, q‐switched Ho:YAG, and quadrupled Nd:YAG lasers

Lasers in Surgery and Medicine, 2015
Background and ObjectivesLigamentum flavum (LF) is a tough, rubbery connective tissue providing a portion of the ligamentous stability to the spinal column, and in its hypertrophied state forms a significant compressive pathology in degenerative spinal stenosis.
Johnson, Matt R., Codd, Patrick J., Hill, Westin M., Boettcher, Tara   +3 more
openaire   +2 more sources

Efficient, low threshold, cryogenic Ho:YAG laser

Optics Express, 2016
We report the development of an efficient, liquid-nitrogen conduction cooled Ho:YAG slab laser with good beam quality. Detailed measurements resolving the structure of the 1900-1911 nm absorption band in Ho:YAG at 77 K are presented. Stress-free conduction cooled mounting of the Ho:YAG slab was demonstrated and the resulting laser operated with a large
Ganija, Miftar, Simakov, Nikita, Hemming, Alexander, Haub, John, Veitch, Peter, Munch, Jesper   +5 more
openaire   +3 more sources

Intra-cavity side-pumped Ho:YAG laser

Optics Express, 2006
We present a novel, compact and power scalable Ho:YAG laser based on intracavity side-pumping by a high-power Tm:YLF slab laser. 14 W of continuous wave output power is obtained at 2.09 microm in the current experiments, with the clear prospect of reaching the 100 W regime in a power scaled version.
So, S., Mackenzie, Jacob, Shepherd, David, Clarkson, W.A., Betterton, J.G., Gorton, E.K., Terry, J.A.C.   +6 more
openaire   +4 more sources

Lasing characteristics of Ho:YAG single crystal fiber

Optics Express, 2016
Lasing was demonstrated for the first time at 2.09 μm in 0.5% Holmium (Ho) doped YAG single crystal fiber (SCF) fabricated using the Laser Heated Pedestal Growth (LHPG) method. Output power of 23.5 W with 67.5% optical-to-optical slope efficiency is, to the best of our knowledge, the highest output power achieved at 2 µm from a SCF fabricated using ...
Yuan, Li, Keith, Miller, Eric G, Johnson, Craig D, Nie, Subhabrata, Bera, James A, Harrington, Ramesh, Shori   +6 more
openaire   +2 more sources

Coherent polarization locking of thermal-sensitive Ho:YAG laser [PDF]

SPIE Proceedings, 2012
We had demonstrated the advantage of using Coherent Polarization Locking on thermal-sensitive Ho:YAG laser cavity. We overcome several thermal issues related to Ho:YAG laser by distributing the gain over a large volume. We passively coherent locked two orthogonal polarized lasers, achieving 9.6W of output power with near perfect (greater than 99 ...
Chua, Chern Fei., Tan, L. H., Phua, Poh Boon.   +2 more
openaire   +2 more sources

Tm:YLF PUMPED Ho:YAG AND Ho:LuAG LASERS [PDF]

Advanced Solid-State Photonics, 2005
Room temperature Ho:YAG and Ho:LuAG lasers pumped by a Tm:YLF laser demonstrated a 3.4 mJ threshold and 0.41 slope efficiency, incident optical to laser output energy. Results for numerous rod lengths, Ho concentrations, and output mirror reflectivities are presented.
Norman P. Barnes, Donald J. Reichle, Brian M. Walsh, Theresa J. Axenson   +3 more
openaire   +1 more source

2 µm Ho:YAG Thin Disk Laser

Advances in Optical Materials, 2011
A Thulium fiber laser pumped Ho:YAG thin disk laser with 15W (cw) or several mJ (pulsed) operation will be presented. Additionally, a narrow (
Renz, Günther, Mahnke, Peter, Speiser, Jochen, Giesen, Adolf   +3 more
openaire   +2 more sources

Hybrid Ho:YAG Laser with 50W Radially-Polarised Output

2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2019
Holmium doped radially polarised lasers operating in the 2.1 μm spectral region are of great interest as they provide benefits of operation in the atmospheric transmission window (2.1–2.25 μm), absorption in transparent polymers, as well as the materials processing benefits that are beginning to be realised from utilising select higher order modes [1].
Shardlow, P.C., Barber, M.J., Butler, A.C., Clarkson, W.A.   +3 more
openaire   +2 more sources