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Mechanically Induced Long-Period Fiber Grating Couplers

We report mechanically induced long-period fiber gratings (LPFGs) coupler made by pressing two unjacketed single mode fibers between two periodic grooved plates. The peak coupling efficiency of the mechanically induced LPFGs coupler is ~23dB at resonance wavelength of 1555.34nm. The coupler is simple, inexpensive, erasable and reconfigurable. Keywords—long-period fiber grating; coupler; mechanically induced effects; microbend; photo-elastic effect