Novel long-period fiber grating using periodically released residual stress of pure-silica core fiber

Summary form only given. Long-period fiber gratings (LPFGs) are promising components in optical fiber communications. The LPFG is usually fabricated by photo-refractive effect using an UV-laser or by fiber deformation by local heating methods. In this report, we propose a new technique for fabricating an LPFG by local heating of a pure-silica core fiber to release residual stress of a core without fiber deformation.