基于过耦合器的L波段可变波长掺铒光纤激光器  

L-Band Variable Wavelength Erbium-Doped Fiber Laser Based on Over-Coupler

作　　者：杨扬[1] 乔学光[1,2] 刘颖刚[2] 周锐[1] 张敬花[1] 张菁[1] 

机构地区：[1]西北大学物理系,陕西西安710069 [2]西安石油大学光电油气测井与检测教育部重点实验室,陕西西安710065

出　　处：《光学学报》2011年第2期122-126,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60727004);西北大学研究生创新教育项目(09YSY10)资助课题

摘　　要：研究了一种新型的光纤环形镜（FLM）的原理和特性,这种FLM是由耦合比对波长变化的耦合器即过耦合器和偏振控制器（PC）构成,改变PC的状态,可以调节环的反射谱位置和深度。与高双折射光纤环形镜构成线型谐振腔,调整光纤环内PC的状态可以改变环对不同波长的反射率,控制腔内的增益从而输出可变波长的激光。实验得到输出波长在1564-1592 nm范围内,波长调谐范围为28 nm,3 dB线宽小于0.2 nm,边模抑制比（SMSR）大于40 dB的稳定激光输出。The principles and characteristics of a novel fiber loop mirror （FLM）, which is composed of polarization controller （PC） and an over-coupler whose coupling ratio is sensitive to wavelength are investigated. The notch depths and positions of loops＇ reflection spectrum can be changed by adjusting the PC in the loops. The linear cavity of the L-band variable wavelength fiber laser consists of high-birefringence fiber loops and the over-coupler fiber loops. The reflectivity of various wavelengthes and the laser gain are controlled by changing the states of the polarization controllers in the cavity. In the experiment, the stable output wavelength can be changed from 1564 nm to 1592 nm, over 28 nm tuning range. Within this range, the 3 dB line-width is less than 0.2 nm and the side mode suppression ratio （SMSR） is more than 40 dB.

关 键 词：光纤光学 波长可调 过耦合器 光纤环形镜 

分 类 号：TN248.1[电子电信—物理电子学]