Intense femtosecond pulse shaping using a fused-silica spatial light modulator

2007 ◽  
Vol 270 (2) ◽  
pp. 305-309 ◽  
Author(s):  
Yu Oishi ◽  
Akira Suda ◽  
Fumihiko Kannari ◽  
Katsumi Midorikawa
Keyword(s):  
Pulse Shaping ◽  
Femtosecond Pulse ◽  
Spatial Light Modulator ◽  
Fused Silica ◽  
Light Modulator

Diffraction-based femtosecond pulse shaping with a two-dimensional spatial light modulator

2005 ◽  
Vol 30 (3) ◽  
pp. 323 ◽  
Author(s):  
Joshua C. Vaughan ◽  
Thomas Hornung ◽  
T. Feurer ◽  
Keith A. Nelson
Keyword(s):  
Pulse Shaping ◽  
Femtosecond Pulse ◽  
Spatial Light Modulator ◽  
Two Dimensional ◽  
Light Modulator

scholarly journals Chirp compensation of femtosecond pulse by liquid-crystal spatial light modulator

2004 ◽  
Vol 53 (5) ◽  
pp. 1391
Author(s):  
Wei Heng-Zheng ◽  
Zhang Zhi-Gang ◽  
Chen Sheng-Hua ◽  
Chai Lu ◽  
Wang Qing-Yue
Keyword(s):  
Liquid Crystal ◽  
Femtosecond Pulse ◽  
Spatial Light Modulator ◽  
Light Modulator ◽  
Chirp Compensation

Development of a Novel Surface Processing System Using Femtosecond Pulse Train

2012 ◽  
Vol 523-524 ◽  
pp. 220-225 ◽  
Author(s):  
Yusuke Fukuta ◽  
Terutake Hayashi ◽  
Masaki Michihata ◽  
Yasuhiro Takaya
Keyword(s):  
Pulse Train ◽  
Femtosecond Pulse ◽  
Spatial Light Modulator ◽  
Thermal Damage ◽  
Processing System ◽  
Heat Diffusion ◽  
Coherent Phonon ◽  
Light Modulator ◽  
Femtosecond Laser Processing ◽  
Specific Frequency

When a laser pulse interacts with metal or semiconductor target, the coherent phonon, which is the coherent motions of lattice and molecule vibrations in solids, is excited by the interaction of electrons and high latitude electric field. It has unique properties of decaying in approximately several picoseconds and substance specific frequency. Owing to that, femtosecond laser processing is the local processing with little heat diffusion and little thermal damage to the target, due to the ultrafast time scales. We propose a novel femtosecond pulse ablation process with oscillation of the coherent phonon by femtosecond pulse train. The pulse train is shaped using Spatial Light Modulator (SLM), which shift the phase of the passing light. And coherent phonon oscillations are enhanced and decayed due to the controlling the shape of pulse train. It is able to activate the lattice motion for processing efficiently, and hence the target is expected to be ablated with high accuracy and less thermal damage.

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