Long-period Fiber Gratings Fabricated by CW CO2 Laser Pulses
连续CO2激光脉冲制作长周期光纤光栅的研究

Long-period fiber gratings (LPFG) are fabricated by using CW CO_2 laser pulses, and transmission spectra are measured at different grating lengths. The coupling strength shows periodical variation versus the grating lengths.This conclusion is in agreement with the coupled mode theory.