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Fabrication of Long-Period Fibre Gratings Using 800 nm Femtosecond Laser Pulses |
| ZHANG Nan;YANG Jian-Jun;WANG Ming-Wei;ZHU Xiao-Nong |
| Key Laboratory of Opto-electronic Information Science and Technology of EOM, Institute of Modern Optics,
Nankai University, Tianjin 300071
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| Cite this article: |
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ZHANG Nan, YANG Jian-Jun, WANG Ming-Wei et al 2006 Chin. Phys. Lett. 23 3281-3284 |
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Abstract Long-period fibre gratings inside standard single-mode optical communication fibres are successfully fabricated with infrared femtosecond laser pulses. The refractive index perturbations are well confined within the fibre core by choosing the proper laser focusing parameters and translation speed of the fibre during the direct laser writing process. With the self-focusing effect considered and at a constant average irradiation dose of 1.62×10³ J/(cm²m), the threshold intensity for fabricating long-period gratings with infrared femtosecond laser pulses is determined to be 5.13×10¹³ W/cm².
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| Keywords:
42. 65. Re
42. 79. Dj
42. 81. Bm
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Published: 01 December 2006
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