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Opt Lett. 2005 Oct 15;30(20):2688-90.

Thermo-optically tunable band-rejection filters using mechanically formed long-period fiber gratings.

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  • 1Division of Radio and Information Communication Engineering, Korea Maritime University, Busan, South Korea.


We present tunable mechanically formed long-period fiber gratings whose resonance peaks are shifted by the thermo-optic effect of a medium surrounding the fiber cladding. A novel grating formation method and tuning principles that use periodically arrayed metal wire are described. The performance as an active gain equalizer of an erbium-doped fiber amplifier is also reported.

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