Spectral broadening in femtosecond laser written waveguides in chalcogenide glass

被引：24
|
作者：
Hughes, Mark A. [1 ]
Yang, Weijia [2 ]
Hewak, Daniel W. [3 ]
机构：
[1] Toyota Technol Inst, Tempaku Ku, Nagoya, Aichi 4688511, Japan
[2] Univ Paris 11, Inst Chim Mol & Mat Orsay, Lab Physicochim LEtat Solide, UMR CNRS UPS 8182, F-91405 Orsay, France
[3] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2009年 / 26卷 / 07期
关键词：
SELF-PHASE-MODULATION; OPTICAL LOOP MIRROR; TRANSPARENT MATERIALS; PULSES; SILICA; AS2S3; PHOTOSENSITIVITY; FABRICATION; NETWORK; FIBERS;
D O I：
10.1364/JOSAB.26.001370
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Nonlinear spectral broadening to 200 nm, from an initial width of 50 nm, has been demonstrated in gallium lanthanum sulphide glass waveguides from 1540 nm, 200 fs pulses at 30 nJ/pulse. A formation mechanism is presented for these femtosecond laser written waveguides, based on optical characterization and comparisons to previous work. Two different types of waveguide are identified. One has a characteristic long narrow structure and is formed through filamentation caused by self-focusing. The other has a characteristic "teardrop" structure, which is formed by a type IIA photosensitivity mechanism and cumulative heating of glass around a central laser-exposed region. (C) 2009 Optical Society of America
引用
收藏
页码：1370 / 1378
页数：9
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