长周期光纤光栅的大范围波长调谐与温度补偿

分别采用丙烯酸类聚合物与硅树脂材料实现了长周期光纤光栅(L PFG) 的大范围波长调
谐与温度补偿. 当温度从0～ 100 °C变化时, 对于表面涂覆丙烯酸类聚合物的L PFG, 波长调谐范围增大至60 nm; 而对于涂覆硅树脂的L PFG, 同样的温度变化波长漂移则被抑制在0. 6 nm 之内. 前者提供一种大范围波长调谐带阻滤波器或高灵敏度温度传感器的思路; 后者可考虑进一步改进后用作经温度补偿的滤波器、波分解复用器或应变传感器.
关键词: 长周期光纤光栅; 波长调谐; 温度补偿; 丙烯酸类聚合物; 硅树脂
Abs tra c t: Bo th acrylate2based po lym er and silicone resin w ere p ropo sed as recoat ing m aterials fo r b road2 band w avelength tun ing and temperatu re compen sat ion of L PFG. The range of w avelength sh if t as m uch as 60 nm is expected fo r the L PFG recoated w ith acrylate2based po lym er w hen temperatu re changes f rom 0～ 100°C. How ever, fo r that recoated w ith silicone resin, the temperatu re sen sit ivity is supp ressed w ith abou t 0. 6 nm of the m ax ium w avelength sh if t w ith the sam e temperatu re variat ion. The fo rm er is po ten2 t ially a b roadband tunab le band reject ion f ilter o r temperatu re sen so r w ith enhanced sen sit ivity. W h ile the lat ter cou ld be modif ied as a temperatu re in sen sit ive f ilter, dem u lt ip lexer o r stain sen so r.
Ke y w o rds: long period f iber grat ing; w avelength tun ing; temperatu re compen sat ion; acrylate2based po ly2 m er; silicone resin