Ultra-fast polymer optical fibre Bragg grating inscription for medical devices  

作　　者：Julien Bonefacino Hwa-Yaw Tam Tom S Glen Xin Cheng Chi-Fung Jeff Pun Jian Wang Po-Heng Lee Ming-Leung Vincent Tse Steven T Boles 

机构地区：[1]Photonics Research Centre,Department of Electrical Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China [2]Division of Urban Environment,Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China

出　　处：《Light(Science & Applications)》2017年第1期104-113,共10页光（科学与应用)（英文版）

基　　金：supported by the General Research Fund Project(n1 PolyU 152207/15E);PolyU Central Grant project 1-ZVGB;support from the Hong Kong Research Grants Council through the Hong Kong PhD Fellowship Scheme.

摘　　要：We report the extraordinary result of rapid fibre Bragg grating inscription in doped polymer optical fibres based on polymethyl methacrylate in only 7 ms,which is two orders of magnitude faster than the inscription times previously reported.This was achieved using a new dopant material,diphenyl disulphide,which was found to enable a fast,positive refractive index change using a low ultraviolet dose.These changes were investigated and found to arise from photodissociation of the diphenyl disulphide molecule and subsequent molecular reorganization.We demonstrate that gratings inscribed in these fibres can exhibit at least a 15 times higher sensitivity than silica glass fibre,despite their quick inscription times.As a demonstration of the sensitivity,we selected a highly stringent situation,namely,the monitoring of a human heartbeat and respiratory functions.These findings could permit the inscription of fibre Bragg gratings during the fibre drawing process for mass production,allowing costeffective,single-use,in vivo sensors among other potential uses.

关 键 词：bio-sensing fibre Bragg grating photosensitive dopant polymer optical fibre 

分 类 号：TN2[电子电信—物理电子学]