Self-inscribed antisymmetric long-period grating in a dual-core As2Se3-PMMA fiber

被引：14

作者：

Baker, Chams ^{[1
]}

Gao, Song ^{[1
]}

Chen, Liang ^{[1
]}

Bao, Xiaoyi ^{[1
]}

机构：

[1] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1364/OE.25.012409

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report for the first time that transmission of optical pulses centered at a wavelength of 1550 nm through a tapered dual-core As2Se3-PMMA fiber inscribes an antisymmetric long-period grating. The pulse power is equally divided between even and odd modes that superpose along the dual-core fiber to form an antisymmetric intensity distribution. A permanent refractive-index change that matches the antisymmetric intensity distribution is inscribed due to photosensitivity at the pulse central wavelength. The evolution of the transmission spectrum of the dual-core fiber is experimentally measured as the accumulated time that the fiber is exposed to the pulse is increased. A theoretical model of an antisymmetric long-period grating in a dual-core fiber computationally reproduces the experimentally observed evolution of the transmission spectrum. Experimental results indicate that antisymmetric long-period gratings induce effective group-velocity matching between the even and odd modes of the dual-core fiber, and reveal for the first time that long-period gratings can lead to slow light propagation velocities. (C) 2017 Optical Society of America

引用

页码：12409 / 12414

页数：6

共 15 条

[1] High efficiency and ultra broadband optical parametric four-wave mixing in chalcogenide-PMMA hybrid microwires [J].