【摘要】 深入研究了采用机械微弯法写制长周期光纤光栅(LPFG)的方案,进一步分析此方案中各种因素对LPFG特性的影响。写制的周期性凹槽板谐振波长变化率为17.7 nm/0.01 mm。当仅增加压力时,损耗峰值先增加,最大可调谐到16.248 dB。当压力过大时,损耗峰值减小。同时附加损耗随着压力增大而增加。而当压力一定时,损耗峰值随着周期性凹槽板的周期数目的增加而减小。研究结果有利于LPFG灵活运用于EDFA增益平坦和滤波应用等方面。更多还原

【Abstract】 A smart method to induce tunable long- period fiber gratings(LPFGs)based on the mechanical minor bend effect is studied.The effects of factors in this method on the tunable LPFGs are further analyzed.It is found that the change rate of resonant wavelength is about 17.7 nm /0.01mm.Only increasing the pressure,the loss peak would increase firstly and can be tuned to 16.248 dB.If the pressure is increased beyond a certain point,the loss peak would decrease.The added loss increases with the increasing pressures.And when the pressure is fixed,the loss peak would decrease with the increase of the period number of grooved plate.The results are propitious to flexibly apply LPFGs to gain flattening in EDFA and filtering.更多还原