Ablation Of Polymers With Pairs Of Ultraviolet Laser Pulses With Controlled Temporal Separation

1989 ◽  
Author(s):  
R. Srinivasan ◽  
Bodil Braren
Keyword(s):  
Laser Pulses ◽  
Temporal Separation ◽  
Ultraviolet Laser

Ablation of Polymers with Pairs of Ultraviolet Laser Pulses with Controlled Temporal Separation

1988 ◽  
Vol 129 ◽  
Author(s):  
Bodil Braren ◽  
R. Srinivasan
Keyword(s):  
Laser Ablation ◽  
Methyl Methacrylate ◽  
Pulse Width ◽  
Electronic States ◽  
Laser Pulses ◽  
Etch Depth ◽  
Time Interval ◽  
Temporal Separation ◽  
Ultraviolet Laser ◽  
Poly Methyl Methacrylate

ABSTRACTThe dependance on the pulse width of the ultraviolet laser ablation and etching of poly(methyl methacrylate) was examined using 40-100 ns pulses. These pulses were created by stitching together two identical pulses, each of 40 ns half-width, which were separated by a set time interval from 0 to 380 ns. The etch depth/pulse is sensitive to the pulse width and, therefore, the power density in this polymer.The response of PMMA to etching by pairs of pulses suggests that short-lived species which may be electronic states (e.g., triplets) and/or radicals play an important role in the ablation. The shape of the pulse was also found to influence the etch depth/pulse.The etching of polyimide by these extended pulses shows trends that are opposite to those observed in poly(methyl methacrylate). In this instance the shielding of the latter portion of the incoming pulse by the products that are ablated by the front portion is probably a serious effect.

Asynchronous cross-correlation for weak ultrafast deep ultraviolet laser pulses

2009 ◽  
Vol 97 (4) ◽  
pp. 759-763 ◽  
Author(s):  
E. Granados ◽  
A. Fuerbach ◽  
D. W. Coutts ◽  
D. J. Spence
Keyword(s):  
Cross Correlation ◽  
Laser Pulses ◽  
Ultraviolet Laser ◽  
Deep Ultraviolet

Action of ultrashort ultraviolet laser pulses on HeLa tumor cells

1981 ◽  
Vol 11 (12) ◽  
pp. 1550-1553
Author(s):  
T Ĭ Karu ◽  
G S Kalendo ◽  
V S Letokhov ◽  
Yu A Matveets ◽  
V A Semchishen ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Laser Pulses ◽  
Ultraviolet Laser

Morphological and damage growth characteristics of shell-type damage of fused silica optics induced by ultraviolet laser pulses

2019 ◽  
Vol 58 (32) ◽  
pp. 8882
Author(s):  
Ke Wang ◽  
Bin Ma ◽  
Jiaqi Han ◽  
Hongfei Jiao ◽  
Xinbin Cheng ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Fused Silica ◽  
Growth Characteristics ◽  
Damage Growth ◽  
Ultraviolet Laser ◽  
Shell Type
Sign in / Sign up

Export Citation Format

Share Document