基于啁啾光纤光栅的波长可调谐带通滤波器  

Wavelength Tunable Band-Pass Filter Based on Chirped Fiber Grating

作　　者：姜萌[1] 张伟刚[1] 金龙[1] 刘长军[1] 张绮[1] 刘亚萍[1] 张春艳[1] 刘波[1] 

机构地区：[1]南开大学现代光学研究所光电信息技术教育部重点实验室,天津300071

出　　处：《中国激光》2009年第4期873-878,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(10674075;60577018;10774077);国家863计划(2006AA01Z217);天津市自然科学基金重点项目(06YFJZJC00300);中国博士后科学基金(20060400687)资助课题

摘　　要：通过对长度4 cm带宽为35 nm的啁啾光纤光栅(CFG)施加横向的局部应力,啁啾光纤光栅的反射阻带中会形成一个或者若干个窄的透射窗口。窗口的位置随着施加应力的位置不同而变化,窗口的深度随着施加压力的大小和区域面积而变化,可以制作出波长可调谐的带通滤波器。3 dB带通宽度为0.2 nm,最小分辨率为0.4 nm。建立了压力造成相移的物理模型,并用分段均匀的方法对啁啾光纤反射谱的改变进行数值模拟,得到了不同受力长度以及不同受力间隔的啁啾光栅反射谱。实验数据与数值模拟的结果相吻合。A 4-cm-long chirped fiber grating （CFG） with 35 nm bandwidth of reflected spectrum is studied with the exertion of local pressure on the fiber through the application of transverse force to a small grating section. One or several narrow transmission windows can be shaped in the reflected spectrum of the chirped fiber grating. Location and depth of the transmission window is changed with the induced pressure. A physical model is developed in order to estimate the phase shifts induced by pressure. Numerical simulation based on the piecewise-uniform approach is also used to calculate the consequent changes in reflected spectrum. Experimental and theoretical datas are in good agreement.

关 键 词：光纤光学 啁啾光纤光栅 压力 相移 滤波器 

分 类 号：TN253[电子电信—物理电子学]