Shape control of elemental distributions inside a glass by simultaneous femtosecond laser irradiation at multiple spots

被引：28

作者：

Sakakura, Masaaki ^{[1
]}

Kurita, Torataro ^{[2
]}

Shimizu, Masahiro ^{[2
]}

Yoshimura, Kouhei ^{[2
]}

Shimotsuma, Yasuhiko ^{[2
]}

Fukuda, Naoaki ^{[1
]}

Hirao, Kazuyuki ^{[2
]}

Miura, Kiyotaka ^{[2
]}

机构：

[1] Kyoto Univ, Off Soc Acad Collaborat Innovat, Hitachi Zosen Collaborat Res Div, Kyoto 6158520, Japan

[2] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Kyoto 6158510, Japan

来源：

OPTICS LETTERS | 2013年 / 38卷 / 23期

关键词：

WAVE-GUIDES; REPETITION-RATE; MECHANISM; CRYSTALS; PULSES;

D O I：

10.1364/OL.38.004939

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The spatial distributions of elements in a glass can be modulated by irradiation with high repetition rate femtosecond laser pulses. However, the shape of the distribution is restricted to being axially symmetric about the laser beam axis due to the isotropic diffusion of photo-thermal energy. In this study, we describe a method to control the shape of the elemental distribution more flexibly by simultaneous irradiation at multiple spots using a spatial light modulator. The accumulation of thermal energy was induced by focusing 250 kHz fs laser pulses at a single spot inside an alumino-borosilicate glass, and the transient temperature distribution was modulated by focusing 1 kHz laser pulses at four spots in the same glass. The resulting modification was square-shaped. A simulation of the mean diffusion length of molten glass demonstrated that the transient diffusion of elements under heat accumulation and repeated temperature elevation at multiple spots caused the square shape of the distribution. (C) 2013 Optical Society of America

引用

页码：4939 / 4942

页数：4

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