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Amplified Spontaneous Emission of Rhodamine B-Doped Step-Index polymer optical fibre

Chinese Physics Letters 2005年第3期22卷 618-620页

作者：李增昌梁浩郑志强张其锦明海 StructureResearchLaboratory UniversityofScienceandTechnologyofChinaHefei230026//DepartmentofPolymerScienceandEngineeringUniversityofScienceandTechnologyofChinaHefei230026 DepartmentofpolymerScienceandEngineering UniversityofScienceandTechnologyofChinaHefei230026 DepartmentofPhysics UniversityofScienceandTechnologyofChinaHefei230026//DepartmentofPhysicsFujianNormalUniversityFuzhou350007 DepartmentofPhysics UniversityofScienceandTechnologyofChinaHefei230026

A step-index polymer optical fibre (SI POF) containing rhodamine B in poly (methyl methacrylate) (PMMA) has been fabricated by a perform technique. The rhodamine B content of the doped SI POF is 5ppm-wt. The spectra of the doped SI POF with different fibre lengths were measured. Amplified spontaneous emission (ASE) at 609nm of an SI POF in length 40cm has been observed at ambient temperature by end-pumping with a Nd:YAG laser operated at 532nm. The threshold of absorbed pump power for the onset of ASE is about 0.003mJ.

关键词： Amplified Spontaneous Emission Rhodamine B-Doped Step-Index polymer optical fibre

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

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Light(Science & Applications) 2017年第1期6卷 104-113页

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 Photonics Research Centre Department of Electrical EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Division of Urban Environment Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

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

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