2016
DOI: 10.3390/app6120428
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Characteristics and Applications of Spatiotemporally Focused Femtosecond Laser Pulses

Abstract: Simultaneous spatial and temporal focusing (SSTF) of femtosecond laser pulses gives rise to strong suppression of nonlinear self-focusing during the propagation of the femtosecond laser beam. In this paper, we begin with an introduction of the principle of SSTF, followed by a review of our recent experimental results on the characterization and application of the spatiotemporally focused pulses for femtosecond laser micromachining. Finally, we summarize all of the results and give a future perspective of this … Show more

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Cited by 16 publications
(10 citation statements)
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“…Recently, temporal focusing has been achieved through static scattering media 10 , which has sparked interest in deep biomedical imaging. In addition, the strong intensity localization has made it an attractive tool for material processing 11 , which has led to extensive studies of elusive physics mechanisms of the strong-field interaction with matter 12 . Considering the stochastic (e.g., time reversal of dynamic speckle patterns to produce temporal focusing in live biological tissue 13 ) and non-repeatable (e.g., micromachining using temporal focusing in glass 14 ) nature of these transient phenomena, visualizing temporal focusing in real time (i.e., at its actual time of occurrence) becomes a prerequisite for investigating and further utilizing them.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, temporal focusing has been achieved through static scattering media 10 , which has sparked interest in deep biomedical imaging. In addition, the strong intensity localization has made it an attractive tool for material processing 11 , which has led to extensive studies of elusive physics mechanisms of the strong-field interaction with matter 12 . Considering the stochastic (e.g., time reversal of dynamic speckle patterns to produce temporal focusing in live biological tissue 13 ) and non-repeatable (e.g., micromachining using temporal focusing in glass 14 ) nature of these transient phenomena, visualizing temporal focusing in real time (i.e., at its actual time of occurrence) becomes a prerequisite for investigating and further utilizing them.…”
Section: Introductionmentioning
confidence: 99%
“…In this way, the initial transform-limited pulse transiently restores itself at the focus while being stretched either before or after the focus, enabling shortening of the focal depth in terms of the peak intensity. [12,13] Here, we show that when combining the SSTF with TPP, the nonlinear threshold effect in TPP uniquely allows for producing multi-scale 3D structures with a variable fabrication resolution in an alignment-free manner. This is benefitted from the fact that the size of laser affected volume with the STTF spot linearly depends on the power of the laser beam, making it extremely easy to dynamically tune the fabrication resolution during the continuous writing process.…”
Section: Introductionmentioning
confidence: 80%
“…A femtosecond laser, which has the advantage of precise ablation with little or no thermal impact on surrounding materials [11,12], can overcome the above shortcomings as an ultra-short-pulse laser. A femtosecond laser has been widely used in many fields, such as the processing of various materials [13,14] and the fabrication of micro-components [15][16][17], because of its unique processing characteristics.…”
Section: Introductionmentioning
confidence: 99%