| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Suppression of the Thermal Effects in the Femtosecond Laser Processing of Fiber Bragg Gratings |
| 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, Xi'an 710049
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| Cite this article: |
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CUI Wei, SI Jin-Hai, CHEN Tao et al 2013 Chin. Phys. Lett. 30 104207 |
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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 1.27 nm, respectively.
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Received: 18 June 2013
Published: 21 November 2013
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