Structural Modification of Amorphous Fused Silica Under Femtosecond Laser Irradiation

2008 ◽  
Author(s):  
S. Vukelic ◽  
B. Gao ◽  
S. Ryu ◽  
Y. L. Yao
Keyword(s):  
Femtosecond Laser ◽  
Material Properties ◽  
Structural Changes ◽  
Three Dimensional ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Femtosecond Laser Irradiation ◽  
Optical Data ◽  
Linear Absorption

Non-linear absorption of femtosecond laser pulses enables the induction of structural changes in the interior of bulk transparent materials without affecting their surface. This property can be exploited for the transmission welding of transparent dielectrics, three dimensional optical data storages and waveguides. In the present study, femtosecond laser pulses were tightly focused within the interior of bulk fused silica specimen. Localized plasma was formed, initiating rearrangement of the network structure. The change in material properties were studied through employment of spatially resolved Raman spectroscopy, atomic force microscopy and optical microscopy. The nature of the physical mechanisms responsible for the alteration of material properties as a function of process parameters is discussed.

Ultrafast Laser Induced Structural Modification of Fused Silica—Part I: Feature Formation Mechanisms

2010 ◽  
Vol 132 (6) ◽  
Author(s):  
Siniša Vukelić ◽  
Panjawat Kongsuwan ◽  
Y. Lawrence Yao
Keyword(s):  
Femtosecond Laser ◽  
Material Properties ◽  
Structural Changes ◽  
Three Dimensional ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Optical Data ◽  
Formation Mechanisms ◽  
Force Microscopy

Nonlinear absorption of femtosecond-laser pulses enables the induction of structural changes in the interior of bulk transparent materials without affecting their surface. This property can be exploited for transmission welding of transparent dielectrics, three dimensional optical data storages, and waveguides. In the present study, femtosecond-laser pulses were tightly focused within the interior of bulk fused silica specimen. Localized plasma was formed, initiating rearrangement of the network structure. Features were generated through employment of single pulses as well as pulse trains using various processing conditions. The change in material properties were studied through employment of differential interference contrast optical microscopy and atomic force microscopy. The morphology of the altered material as well as the nature of the physical mechanisms (thermal, explosive plasma expansion, or in-between) responsible for the alteration of material properties as a function of process parameters is discussed.

Ultrafast Laser Induced Structural Modification of Fused Silica—Part II: Spatially Resolved and Decomposed Raman Spectral Analysis

2010 ◽  
Vol 132 (6) ◽  
Author(s):  
Siniša Vukelić ◽  
Panjawat Kongsuwan ◽  
Sunmin Ryu ◽  
Y. Lawrence Yao
Keyword(s):  
Femtosecond Laser ◽  
Structural Changes ◽  
Volume Fraction ◽  
Random Network ◽  
Target Material ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Process Conditions ◽  
Spatially Resolved

Nonlinear absorption of femtosecond laser pulses enables the induction of structural changes in the interior of bulk transparent materials without affecting their surface. In the present study, femtosecond laser pulses were tightly focused within the interior of bulk fused silica specimen. Localized plasma was formed, initiating rearrangement of the random network structure. Cross sections of the induced features were examined via decomposition of spatially resolved Raman spectra and a new method for the quantitative characterization of the structure of amorphous fused silica was developed. The proposed method identifies the volume fraction distribution of ring structures within the continuous random network of the probed volume of the target material and changes of the distribution with laser process conditions. Effects of the different process conditions and the material response to different mechanisms of feature generation were discussed as well.

Demonstration of high-density three-dimensional storage in fused silica by femtosecond laser pulses

2003 ◽  
Vol 94 (3) ◽  
pp. 1304-1307 ◽  
Author(s):  
Guanghua Cheng ◽  
Yishan Wang ◽  
J. D. White ◽  
Qing Liu ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Three Dimensional ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
High Density

Structural changes in fused silica after exposure to focused femtosecond laser pulses

2001 ◽  
Vol 26 (21) ◽  
pp. 1726 ◽  
Author(s):  
J. W. Chan ◽  
T. Huser ◽  
S. Risbud ◽  
D. M. Krol
Keyword(s):  
Femtosecond Laser ◽  
Structural Changes ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica

scholarly journals Mechanisms of three-dimensional structuring of photo-polymers by tightly focussed femtosecond laser pulses

2010 ◽  
Vol 18 (10) ◽  
pp. 10209 ◽  
Author(s):  
Mangirdas Malinauskas ◽  
Albertas Žukauskas ◽  
Gabija Bičkauskaitė ◽  
Roaldas Gadonas ◽  
Saulius Juodkazis
Keyword(s):  
Femtosecond Laser ◽  
Three Dimensional ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

High power supercontinuum generation by dual-color femtosecond laser pulses in fused silica

2021 ◽  
Author(s):  
Saba Zafar ◽  
Dong-Wei Li ◽  
Acner Camino ◽  
Jun-Wei Chang ◽  
Zuo-Qiang Hao
Keyword(s):  
Femtosecond Laser ◽  
High Power ◽  
Microlens Array ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Spectral Energy ◽  
Phase Matching ◽  
Fundamental Wavelength ◽  
Fundamental Laser

Abstract High power supercontinuum (SC) is generated by focusing 800 nm and 400 nm femtosecond laser pulses in fused silica with a microlens array. It is found that the spectrum of the SC is getting broader compared with the case of single laser pulse, and the spectral energy density between the two fundamental laser wavelengths is getting significantly higher by optimizing the phase matching angle of the BBO. It exceeds μJ/nm over 490 nm range which is from 380 nm to 870 nm, overcoming the disadvantage of relative lower power in the ranges far from fundamental wavelength.

Transient reflectivity and transmission changes during plasma formation and ablation in fused silica induced by femtosecond laser pulses

2008 ◽  
Vol 92 (4) ◽  
pp. 803-808 ◽  
Author(s):  
D. Puerto ◽  
W. Gawelda ◽  
J. Siegel ◽  
J. Bonse ◽  
G. Bachelier ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Plasma Formation

scholarly journals Study of three-dimensional storage by parallel writing in PMMA with femtosecond laser pulses

2004 ◽  
Vol 53 (2) ◽  
pp. 436
Author(s):  
Cheng Guang-Hua ◽  
Wang Yi-Shan ◽  
Liu Qin ◽  
Zhao Wei ◽  
Chen Guo-Fu
Keyword(s):  
Femtosecond Laser ◽  
Three Dimensional ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Enhanced formation of nanogratings inside fused silica due to the generation of self-trapped excitons induced by femtosecond laser pulses

2012 ◽  
Author(s):  
Sören Richter ◽  
Fei Jia ◽  
Matthias Heinrich ◽  
Sven Döring ◽  
Stefan Nolte ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica
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