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Suppression of the Thermal Effects in the Femtosecond Laser Processing of Fiber Bragg Gratings

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【Author】 CUI Wei;SI Jin-Hai;CHEN Tao;YAN Fei;CHEN Feng;HOU Xun;Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique,School of Electronics & Information Engineering,Xi’an Jiaotong University;

【机构】 Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique,School of Electronics & Information Engineering,Xi’an Jiaotong University；

【摘要】 The thermal effects on the processing of type-I IR fiber Bragg gratings（FBGs） using a femtosecond laser with a phase mask are investigated.Thermal effects are significantly suppressed by using interval exposure mode and reducing the tension on the fiber.FBGs with improved photo-induced refractive index modulation are fabricated in the standard telecom fiber.The index modulation reaches 1.6 × 10^-3.The reflectivity and bandwidth are measured to be-0.36 dB and 1.27nm,respectively.更多还原

【Abstract】 The thermal effects on the processing of type-I IR fiber Bragg gratings（FBGs） using a femtosecond laser with a phase mask are investigated.Thermal effects are significantly suppressed by using interval exposure mode and reducing the tension on the fiber.FBGs with improved photo-induced refractive index modulation are fabricated in the standard telecom fiber.The index modulation reaches 1.6 × 10^-3.The reflectivity and bandwidth are measured to be-0.36 dB and 1.27nm,respectively.更多还原

【基金】 Supported by the National Basic Research Program of China under Grant No 2012CB921804;the National Natural Science Foundation of China under Grant Nos 11204236 and 91123028

【文献出处】 Chinese Physics Letters ,中国物理快报(英文版) , 编辑部邮箱 ,2013年10期

【分类号】TN253

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