Steady-state mechanism for polymer ablation by a free-running Er:YAG laser

2006 ◽  
Vol 253 (5) ◽  
pp. 2386-2392 ◽  
Author(s):  
D.M. Bubb ◽  
A.O. Sezer ◽  
D. Harris ◽  
F. Rezae ◽  
S.P. Kelty
Keyword(s):  
Steady State ◽  
Er:Yag Laser ◽  
Polymer Ablation ◽  
Free Running

Study of a room temperature, monocrystalline Fe:ZnSe laser, pumped by a high-energy, free-running Er:YAG laser

Laser Physics ◽  
2019 ◽  
Vol 29 (8) ◽  
pp. 085004 ◽  
Author(s):  
M P Frolov ◽  
Yu V Korostelin ◽  
V I Kozlovsky ◽  
Ya K Skasyrsky
Keyword(s):  
Room Temperature ◽  
Er:Yag Laser ◽  
High Energy ◽  
Free Running

The influence of the Q-switched and free-running Er:YAG laser beam characteristics on the ablation of root canal dentine

2004 ◽  
Vol 233 (1-4) ◽  
pp. 234-243 ◽  
Author(s):  
Eirini Papagiakoumou ◽  
Dimitrios N Papadopoulos ◽  
Marouan G Khabbaz ◽  
Mersini I Makropoulou ◽  
Alexander A Serafetinides
Keyword(s):  
Laser Beam ◽  
Root Canal ◽  
Er:Yag Laser ◽  
Free Running ◽  
Beam Characteristics

Comparative study of gelatin ablation by free-running and Q-switch modes of Er:YAG laser

1991 ◽  
Author(s):  
Vitali I. Konov ◽  
Lev A. Kulevsky ◽  
Alexei V. Lukashev ◽  
Vladimir P. Pashinin ◽  
Alexander S. Silenok
Keyword(s):  
Comparative Study ◽  
Er:Yag Laser ◽  
Free Running

scholarly journals Er:YAG Laser Cleaning of Painted Surfaces: Functional Considerations to Improve Efficacy and Reduce Side Effects

Coatings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1315
Author(s):  
Cong Wang ◽  
Yijian Cao ◽  
Fude Tie ◽  
Mara Camaiti
Keyword(s):  
Side Effects ◽  
Er:Yag Laser ◽  
Fine Arts ◽  
Microscopic Analysis ◽  
Egg Yolk ◽  
Laser Cleaning ◽  
Dust Deposition ◽  
Invasive Treatment ◽  
Laser Systems ◽  
Free Running

The restoration of paintings always involves the removal of darkened superficial layers, which are mainly due to dust deposition and aged varnishes. As cleaning is an irreversible and invasive treatment, physical methods (i.e., laser cleaning) instead of chemical ones are frequently suggested to reduce side effects on pictorial layers. Among the most employed laser systems, the free-running Er:YAG laser is considered very suitable for fine arts cleaning. This laser works at 2.94 μm, at which only –OH and –NH bonds in molecules are excited. This character can become a disadvantage when pigments with these functional groups are present. To understand the potential of the Er:YAG laser in such situations or in the presence of degradable pigments, the effectiveness of varnish removal from paintings prepared with egg yolk as the binder and cinnabar and lead white as the pigments were systematically investigated. Different cleaning conditions were used, and a hyperspectral sensor was innovatively used as a rapid, in situ and non-destructive technique to assess the effects of laser ablation, besides microscopic analysis. Though results obtained show all these pigments are sensitive to this laser radiation, satisfactory cleaning can be achieved without damaging the pictorial layer. The best cleaning conditions were 0.5 W of power (50 mJ and 10 Hz for energy and frequency), with 2-propanol as the wetting agent.

scholarly journals Natively fat‐suppressed 5D whole‐heart MRI with a radial free‐running fast‐interrupted steady‐state (FISS) sequence at 1.5T and 3T

2019 ◽  
Vol 83 (1) ◽  
pp. 45-55 ◽  
Author(s):  
Jessica A.M. Bastiaansen ◽  
Davide Piccini ◽  
Lorenzo Di Sopra ◽  
Christopher W. Roy ◽  
John Heerfordt ◽  
...  
Keyword(s):  
Steady State ◽  
Free Running ◽  
Whole Heart

Lasing characteristics of free-running and Q-switched high-energy 2.69-μm Cr,Tm,Er:YAG laser

2000 ◽  
Author(s):  
Ramesh K. Shori ◽  
Andrew A. Walston ◽  
Oscar M. Stafsudd ◽  
Milan R. Kokta
Keyword(s):  
Er:Yag Laser ◽  
High Energy ◽  
Free Running

Comparative evaluation of HP oxide glass fibers for Q-switched and free-running Er:YAG laser beam propagation

2003 ◽  
Vol 220 (1-3) ◽  
pp. 151-160 ◽  
Author(s):  
E. Papagiakoumou ◽  
D.N. Papadopoulos ◽  
N. Anastasopoulou ◽  
A.A. Serafetinides
Keyword(s):  
Laser Beam ◽  
Comparative Evaluation ◽  
Er:Yag Laser ◽  
Glass Fibers ◽  
Beam Propagation ◽  
Oxide Glass ◽  
Laser Beam Propagation ◽  
Free Running

scholarly journals Synchronous state in a fully connected phase-locked loop network

2006 ◽  
Vol 2006 ◽  
pp. 1-12 ◽  
Author(s):  
J. R. C. Piqueira ◽  
M. Q. Oliveira ◽  
L. H. A. Monteiro
Keyword(s):  
Steady State ◽  
Dynamic Process ◽  
Numerical Experiments ◽  
Phase Locked Loops ◽  
Synchronous State ◽  
Propagation Delays ◽  
Node Network ◽  
Loop Network ◽  
Free Running ◽  
Fully Connected

Fully connected phase-locked networks are built with all nodes exchanging phase and frequency signals. The nodes are phase-locked loops (PLLs) with slightly different free-running frequencies. The synchronous state emerges from a dynamic process with the phase interactions generating a common frequency steady state. In this work, an estimation is analytically obtained for the synchronous state in a genericN-node network. Numerical experiments complete the analysis of the fully connected network relating free-running frequencies, node gains, and propagation delays.

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