Tunable Long Period Fiber Gratings Based on Periodic Rectangular Pressure Grooves*
基于周期性矩形压力槽的可调谐长周期光纤光栅

Long period fiber gratings were mechanically fabricated through periodic rectangular pressure grooves method. The rectangular periodic pressure grooves were made by mechanical line processing technology with the groove period of 600 μm and 60 grating periods. The pressure and temperature characteristics of the fabricated LPFG were studied with different pressure and temperature, respectively. The resonant wavelength could be adjusted by tilting the angle between the fiber and the grooved plate. The fabricated LPFG′s maximum resonant peak is up to 15 dB and the range of tunable resonance wavelength exceeds 12nm by adjusting the angle between fiber and grooved plate.