Three-dimensional structuring inside transparent materials by a phase modulated fs laser beam with a LCOS-SLM

Sakakura, Masaaki; Miura, Kiyotaka; Sawano, Tsutomu; Shimotsuma, Yasuhiko; Hirao, Kazuyuki

doi:10.1117/12.881190

Cited by 4 publications

(1 citation statement)

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“…One of the critical problems in industrial application of fs laser processing is the processing efficiency. One method to improve the processing efficiency is a parallel laser processing with a spatial light modulator (SLM) [4][5][6][7][8][9][10] . In the parallel laser processing, multiple light spots are generated by modulating of the spatial phase distribution of a laser beam with an SLM and focusing the phase modulated laser beam.…”

Section: Introductionmentioning

confidence: 99%

Control of material properties by parallel laser irradiations at multiple laser spots using a spatial light modulator

et al. 2012

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Applications of the parallel fs laser processing system to spatial control of material properties are presented. In the parallel laser processing system, multiple light spots are generated by modulating the spatial phase distribution of a laser beam with a spatial light modulator. When the light spots are sufficiently separated from each other or the energies of the excitation laser pulses are weak, there is little interaction between photoexcited regions. In many cases, no interaction between each photoexcited regions is preferable, because thermal energies and stresses from each photoexcited regions could influence the processing accuracy. On the other hand, we found that the interaction of thermal energies and transient stresses in a parallel laser processing inside transparent materials can be used for controlling the spatial distributions of material properties. In this paper, we show two applications of the interactions between multiple photoexcited regions. One is the control of the shape of the heat modification and distributions of elements inside glasses. Another is the modification of dislocation bands inside rock-salt crystals by the interference of stress waves generated at multiple spots.

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Section: Introductionmentioning

confidence: 99%

Control of material properties by parallel laser irradiations at multiple laser spots using a spatial light modulator

et al. 2012

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Applications of parallel femtosecond laser writing inside glasses and observation of the dynamics

Sakakura

Shimotsuma

Fukuda

et al. 2016

Photonics and Fiber Technology 2016 (ACOFT, BGPP, NP)

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Spatial light modulator based laser microfabrication of volume optics inside solar modules

et al. 2018

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Ultrashort pulse laser systems enable new approaches of material processing and manufacturing with enhanced precision and productivity. Time- and cost-effectiveness in the context of the industrialization of ultrashort laser pulse processes require an improvement of processing speed, which is of key importance for strengthening industrial photonics based manufacturing and extending its field of applications. This article presents results on improving the speed of a laser process by parallelization for creating light deflecting volume optics. Diffractive optical elements are fabricated directly inside the encapsulant of solar modules by utilizing a spatial light modulator based parallel laser microfabrication method. The fabricated volume optical elements effectively deflect light away from front side electrodes and significantly reduce the corresponding optical losses.

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Three-dimensional structuring inside transparent materials by a phase modulated fs laser beam with a LCOS-SLM

Cited by 4 publications

References 0 publications

Control of material properties by parallel laser irradiations at multiple laser spots using a spatial light modulator

Control of material properties by parallel laser irradiations at multiple laser spots using a spatial light modulator

Applications of parallel femtosecond laser writing inside glasses and observation of the dynamics

Spatial light modulator based laser microfabrication of volume optics inside solar modules

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