A novel fabrication technique of corrugated long-period fiber gratings for mass production and its transmission characteristic as applied mechanical force

A new fabrication technique for corrugated long-period fiber gratings (CLPFGs) with periodic polymer microstructures is proposed. Transmission characteristics of CLPFGs are improved by changing the applied strain because of the control of the coupling strength. The sensitivities of strain, torsion and ambient refractive index were measured.