Porous glass density tailoring by femtosecond laser pulses

被引：7

作者：

Zhong, Lijing ^{[1
,2
]}

Zakoldaev, R. A. ^{[1
]}

Sergeev, M. M. ^{[1
]}

Veiko, V. P. ^{[1
]}

Li, Zhengyan ^{[2
]}

机构：

[1] ITMO Univ, Kronverkskiy Pr 49, St Petersburg 197101, Russia

[2] Huazhong Univ Sci & Technol, Luoyu Rd 1037, Wuhan, Peoples R China

来源：

OPTICAL AND QUANTUM ELECTRONICS | 2020年 / 52卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

Femtosecond laser; Porous glass; Waveguide; Refractive index change; Glass matrix density; WAVE-GUIDES; GROWTH;

D O I：

10.1007/s11082-019-2163-7

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this work, a new domain of femtosecond laser-induced densification was exploited as a method for space-selective control of porous glass matrix density. The estimated refractive index change (Delta n) of laser-induced modified region shows a core-cladding structure with the Delta n in the range of 10(-4)-10(-2) depending on laser pulse energy and translating speed. The approximate linear relationship between glass matrix density vs Delta n is theoretically proved by employing the Lorentz-Lorenz equation. Thus, the positive and negative Delta n of modified region are interpreted as the densification and rarefaction of glass matrix, respectively.

引用

页数：8

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