可调谐48nm弯致应变光纤光栅  

Fiber Bragg gratings with bending strain induced wavelength tuning range of 48 nm

作　　者：于小宁[1] 孙成城[1] 张勤[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第4期456-457,466,共3页Journal of Tsinghua University(Science and Technology)

摘　　要：为了满足光纤通信和光纤传感对大范围波长调谐的迫切需要,该文对弯致应变光纤光栅波长调谐的公式进行了推导,给出了解析表达式,并研制了弯致应变光纤光栅波长调谐的实验装置,实现了高达48nm的波长调谐范围。在波长调谐过程中,3dB带宽展宽约为0.1nm;在误差允许范围内,波长调谐的实验值与解析表达式得出的理论曲线相吻合。Optical communication and optical sensing systems require a wide-range of tunable wavelength filters. Fiber Bragg gratings can be used for such filters by using the bending strain to tune the wavelengths. Equations were derived relating the wavelength tuning of fiber Bragg gratings to the bending strain. Tests showed that a wavelength tuning range of 48 nm could be obtained with a fiber Bragg grating with a broadening of the 3 dB bandwidth of less than 0.1 nm. The experiment wavelength tuning results were also consistent with the theoretical predictions.

关 键 词：光纤光栅 弯致应变 波长调谐 

分 类 号：TN253[电子电信—物理电子学]