Method for utilizing photonic crystal fiber of special structure to achieve fast light transmission

The invention discloses a method for utilizing a photonic crystal fiber of a special structure to sense fast light pulse broadening temperature and a sensor. According to the photonic crystal fiber, four layers of air holes are arrayed in a regular hexagonal mode, and one air hole in the center is not involved; Brillouin frequency shift reduces along with the increase of the duty ratio, under theconditions that the pump power is maintained at 20 mw and the transmission length of the fast light is maintained at 10 m, the time advance amount increases with the increase of the duty ratio, and the change tendency of a pulse broadening factor is opposite to that of the time advance amount; according to influences of the special PCF structure on SBS fast light transmission characteristics, a corresponding fast light transmission system model is designed. 本发明公开种利用特殊结构光子晶体光纤快光脉冲展宽温度传感方法和传感器光子晶体光纤为四层空气孔正六边形排列，中心个空气孔缺失；布里渊频移随着占空比的增大而减小，在保持泵浦功率为20mw和快光传输长度为10m的条件下，时间提前量随着占空比的增大而增大，脉冲展宽因子与时间提前量变化趋势相反；本发明根据特殊PCF结构对SBS快光传输