【摘要】 采用改进的全矢量有效折射率法和耦合模理论,研究了光子晶体光纤布拉格光栅长度、占空比、光栅周期与慢光的变化规律。结果表明当光栅长度和光栅周期不变时,随着包层空气孔占空比的增大,光栅的慢光峰值波长出现蓝移,且时延量逐渐减小;1.06 cm长的光子晶体光纤布拉格光栅可以产生约52 ps的线性时延;光栅长度越大,慢光时延量越大;优化结构参数,在光子晶体光纤布拉格光栅的时延谱的侧瓣附近会产生最大群速度为c/371的慢光峰。更多还原

【Abstract】 The influence of grating length,air filling factor and grating period of photonic crystal fiber Bragg grating(PCFBG) on slow light was investigated by improved full vector Effective Index Method(IEIM) and the Coupled-mode theory.The results indicate that the slow light peak wavelength of PCFBG shows a blue shift as the filling factor increases,and the slow light of PCFBG decreases gradually while keeping the grating length and grating period as constants;1.06 centimeter-long PCFBG can produce linear delay of about 52 ps;slow light of PCFBG increases with the grating length increase;the maximum group velocity of c/371 exists in the vicinity of the side-lobes under optimizing the structure parameters.更多还原