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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| http://dx.doi.org/10.1364/ol.30.002688 | DOI Listing |
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