A novel method to mechanically induce a long-period fiber grating (LPFG) by a grooved plate is reported. The transmission spectra of this kind of grating under different pressures and some special LPFG’s are experimentally investigated. This method is simple and reconfigurable and offers large spectra tunability. This type of LPFG has potential applications for gain flattening in erbium-doped fiber amplifiers (EDFA) and for filter design.
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