High speed FBG switching
Nano-second switching of fiber Bragg gratings has been demonstrated by Zhangwei Yu and coworkers at Acreo Fiber Optic Center and KTH.
High-speed switching or tuning of light in fiber Bragg gratings (FBGs) can be used for e.g. Q-switching, cavity dumping, and pulse picking in fiber lasers. Many traditional techniques are relatively slow (microseconds) and have mechanical durability issues.
FBGs were fabricated in microstructured fibers with electrodes, and high-speed switching achieved by applying a current pulse to the electrodes. The components are short length, low optical loss, and all-spliced fiber devices. More information can be found in the publications below.
Selected publications
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Yu, Z., Fibre Bragg Grating Components for Filtering, Switching and Lasing. PhD thesis. Royal Institute of Technology (KTH), Stockholm, Sweden, 2008. thesis |
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Yu, Z., Tarasenko, O., Margulis, W., and Fonjallaz, P-Y. "Birefringence switching of Bragg gratings in fibers with internal electrodes", Optics Express, 16(11), 8229-8235. 2008. abstract |
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Yu, Z., Margulis, W., Tarasenko, O., Knape, H., and Fonjallaz, P-Y. "Nanosecond switching of fiber Bragg gratings", Optics Express, 15(22), 14948-14953. 2007. abstract |
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Yu, Z., Margulis, W., Fonjallaz, P-Y., and Tarasenko, O., "Physics of Electrically Switched Fiber Bragg Gratings", Conference on Lasers and Elecrooptics (CLEO 2008), San Jose, May 2008 |
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