scholarly journals Conical phase front and aberration beam shaping for manipulating femtosecond laser chemical etching

2021 ◽  
Author(s):  
Ehsan Alimohammadian ◽  
Erden Ertorer ◽  
Peter Herman
Keyword(s):  
Femtosecond Laser ◽  
Chemical Etching ◽  
Beam Shaping ◽  
Phase Front

Fabrication and Characterization of Si Nano-Columns by Femtosecond Laser

2012 ◽  
Vol 16 ◽  
pp. 15-20 ◽  
Author(s):  
Omid Tayefeh Ghalehbeygi ◽  
Vural Kara ◽  
Levent Trabzon ◽  
Selcuk Akturk ◽  
Huseyin Kizil
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Laser Beam ◽  
Chemical Etching ◽  
Silicon Surface ◽  
Laser Pulses ◽  
Laser Beam Profile ◽  
Fs Laser ◽  
Fabrication And Characterization

We fabricated Si Nano-columns by a femtosecond laser with various wavelengths and process parameters, whilst the specimen was submerged in water. The experiments were carried out by three types of wavelengths i.e. 1030 nm, 515nm, 343nm, with 500 fs laser pulses. The scales of these spikes are much smaller than micro spikes that are constructed by laser irradiation of silicon surface in vacuum or gases like SF6, Cl2. The Si nano-columns of 300 nm or less in width were characterized by SEM measurements. The formation of these Si Nano-columns that were revealed by SEM observation, indicates chemical etching with laser ablation occurred when surface exposed by laser beam. We observed 200 nm spikes height at the center of laser beam profile and the ones uniform in height at lateral incident area.

Beam-shaping via femtosecond laser-modified optical fibre end faces

2016 ◽  
Author(s):  
A. Ioannou ◽  
M. Polis ◽  
A. Lacraz ◽  
A. Theodosiou ◽  
K. Kalli
Keyword(s):  
Femtosecond Laser ◽  
Optical Fibre ◽  
Beam Shaping

scholarly journals Slit Beam Shaping Technique for Femtosecond Laser Inscription of Enhanced Plane-by-Plane FBGs

2020 ◽  
Vol 38 (16) ◽  
pp. 4526-4532 ◽  
Author(s):  
Pablo Roldan-Varona ◽  
David Pallares-Aldeiturriaga ◽  
Luis Rodriguez-Cobo ◽  
Jose Miguel Lopez-Higuera
Keyword(s):  
Femtosecond Laser ◽  
Beam Shaping ◽  
Shaping Technique

scholarly journals Slit beam shaping method for femtosecond laser direct-write fabrication of symmetric waveguides in bulk glasses

2005 ◽  
Vol 13 (15) ◽  
pp. 5676 ◽  
Author(s):  
M. Ams ◽  
G. D. Marshall ◽  
D. J. Spence ◽  
M. J. Withford
Keyword(s):  
Femtosecond Laser ◽  
Beam Shaping ◽  
Direct Write ◽  
Bulk Glasses ◽  
Laser Direct Write
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