Characteristic of high temperature structural long period grating fabricated by femtosecond laser

摘要：

　　Structural Long period gratings (LPGs) in photonic crystal fiber (PCF) were successfully fabricated using the femtosecond laser micromachining system by introducing periodic side-holes.High temperature characterizations of the fabricated gratings have been performed.The gratings written with the femtosecond laser micromachining technique suffer a low shift of the resonance wavelengths with sensitivity of 23pm/℃ while the temperature is increased from 20℃ to 1200℃.The LPGs have been found to have negligible temperature sensitivity whilst exhibiting useful strain (-1.86pm/με) and strong directional bend sensitivity bending sensitivities with -4.40nm·m (180°) and -2.79nm·m (0°) at low temperature.The unique sensing characteristics enable many potential sensing applications in high temperature environments.such as space aircraft,nuclear power plants,and the chemical industry.

关键词： Long period grating Femtosecond laser High temperature sensing

作者: Shujing Liu Mingyan Luo Qiang Ji

作者单位: School of Biomedical Engineering,Tianjin Medical University,Tianjin,300070,China;College of Optical School of Biomedical Engineering,Tianjin Medical University,Tianjin,300070,China

会议类型: 国内会议

会议名称: 第九届全国光子学学术会议暨中国光学学会纤维光学与集成光学专委会成立30周年大会

会议地点: 成都

会议语种:英文

页码: 1-6

在线出版日期: 2014-11-07（万方平台首次上网日期，不代表论文的发表时间）