Femtosecond laser irradiation of polymethylmethacrylate for refractive index gratings

被引:74
作者
Scully, PJ
Jones, D
Jaroszynski, DA
机构
[1] Univ Manchester, Dept Instrumentat & Analyt Sci, Manchester M60 1QD, Lancs, England
[2] Univ Strathclyde, Dept Phys & Appl Phys, Strathclyde Elect & Terahertz Opt Pulse Source, Glasgow G4 0NG, Lanark, Scotland
来源
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 2003年 / 5卷 / 04期
关键词
polymethylmethacrylate; polymer optical fibre; refractive index; femtosecond laser;
D O I
10.1088/1464-4258/5/4/361
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Polymethylmethacrylate (PMMA) or Perspex is an inexpensive polymer widely used for making the cores of communications grade polymer optical fibres (POFs) and as a substrate for polymer optoelectronic devices and integrated waveguides. Periodic refractive index structures have been written in undoped PMMA using multiple pulses of 40 fs duration from a 1 kHz Ti:sapphire ferntosecond laser operating at the fundamental (800 nm). A refractive index change (Deltan) of 5 +/- 0.5 x 10(-4) was observed before the onset of striations. Optimization of writing conditions for refractive index modification of POF fibres or bulk undoped PMMA will enable structures such as Bragg gratings, long-period gratings, mode couplers, microlens arrays, and zone plates to be written.
引用
收藏
页码:S92 / S96
页数:5
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