Excimer-laser-assisted thrombolysis: the effect of laser fluence, repetition rate, and catheter size

2002 ◽  
Author(s):  
Thanassis Papaioannou ◽  
Oleg Sorokoumov ◽  
Kevin D. Taylor ◽  
Warren S. Grundfest
Keyword(s):  
Excimer Laser ◽  
Laser Fluence ◽  
Repetition Rate ◽  
Catheter Size

Origin of the Laser-Induced Broad Band Luminescence from a WF6/H2/Ar Gas Mixture

1991 ◽  
Vol 236 ◽  
Author(s):  
P. Heszler ◽  
P. Mogyorósi ◽  
J.O. Carlsson
Keyword(s):  
Light Intensity ◽  
Excimer Laser ◽  
Laser Fluence ◽  
Repetition Rate ◽  
Broad Band ◽  
Gas Mixture ◽  
Arf Excimer Laser ◽  
Ar Gas ◽  
20 Nm

AbstractThe origin of the ArF excimer laser induced luminescence from a WF6/H2/Ar gas mixture was investigated. The experiments prove that the emission originates from excited W clusters with a size of about 10-20 nm. The influence of the H2 and Ar concentrations, the laser fluence and the repetition rate on the light intensity was studied.

High Resolution Displacement of Functional Groups onto Fluorocarbon Resin Surface by Using ArF Excimer Laser

1996 ◽  
Vol 451 ◽  
Author(s):  
T. Shimizu ◽  
M. Murahara
Keyword(s):  
Contact Angle ◽  
High Resolution ◽  
Laser Beam ◽  
Thin Layer ◽  
Functional Groups ◽  
Excimer Laser ◽  
Laser Fluence ◽  
Large Area ◽  
Three Solutions ◽  
Arf Excimer Laser

ABSTRACTA Fluorocarbon resin surface was selectively modified by irradiation with a ArF laser beam through a thin layer of NaAlO2, B(OH)3, or H2O solution to give a hydrophilic property. As a result, with low fluence, the surface was most effectively modified with the NaAlO2 solution among the three solutions. However, the contact angle in this case changed by 10 degrees as the fluence changed only 1mJ/cm2. When modifying a large area of the surface, high resolution displacement could not be achieved because the laser beam was not uniform in displacing functional groups. Thus, the laser fluence was successfully made uniform by homogenizing the laser beam; the functional groups were replaced on the fluorocarbon resin surface with high resolution, which was successfully modified to be hydrophilic by distributing the laser fluence uniformly.

5 kHz high repetition rate and high power XeCl excimer laser

1995 ◽  
Vol 66 (11) ◽  
pp. 5162-5164 ◽  
Author(s):  
Tatsumi Goto ◽  
Koji Kakizaki ◽  
Shigeyuki Takagi ◽  
Noboru Okamoto ◽  
Saburo Sato ◽  
...  
Keyword(s):  
Excimer Laser ◽  
High Power ◽  
Repetition Rate ◽  
High Repetition Rate ◽  
High Repetition ◽  
Xecl Excimer Laser

A New Double Laser Recrystallization Technique to Induce Ultra-Large Poly-Si Grains

2001 ◽  
Vol 685 ◽  
Author(s):  
Minghong Lee ◽  
Seungjae Moon ◽  
Mutsuko Hatano ◽  
Costas P. Grigoropoulos
Keyword(s):  
Grain Growth ◽  
Excimer Laser ◽  
Laser Fluence ◽  
Laser Power ◽  
Laser Flash ◽  
Process Window ◽  
Nanosecond Laser ◽  
Solidification Velocity ◽  
Laser Recrystallization ◽  
Nucleation Sites

AbstractA new double laser recrystallization technique that can produce lateral grains of tens of micrometers is presented. A nanosecond laser (excimer or Nd:YLF laser) and a pulse modulated Ar+ laser are used in the experiment. The effect of different parameters on lateral grain growth is investigated. These parameters include the time delay between the two lasers, the excimer laser fluence, the Ar+ laser power and the pulse duration. This process has wide process window and is insensitive to both the excimer laser fluence and the Ar+ laser power fluctuations. Preheating and melting of the a-Si film with the Ar+ laser before firing the excimer laser is found to be necessary for inducting lateral grain growth. The transient excimer laser irradiation is believed to generate nucleation sites for initiating the subsequent lateral grain growth. The solidification dynamics of the process is probed by high spatial and temporal resolution laser flash photography. A lateral solidification velocity of about 10 m/s is observed.

Sign in / Sign up

Export Citation Format

Share Document