高折射率纤芯掺铒布拉格光纤放大器研究  

Performance Studies on Er^(3+)-Doped Amplifier Based on Bragg Fiber with High Index Core

作　　者：孙婷婷[1] 王志[2] 赵立龙[1] 

机构地区：[1]南京信息工程大学数理学院,江苏南京210044 [2]南开大学现代光学研究所,天津300071

出　　处：《激光与光电子学进展》2010年第12期21-25,共5页Laser & Optoelectronics Progress

基　　金：南京信息工程大学科研基金(20080287;S8109005001);江苏省高校自然科学研究计划项目(09KJB170003)资助课题

摘　　要：对高折射率纤芯掺铒布拉格光纤放大器特性进行实验研究,测量了正向抽运、反向抽运方式下布拉格掺铒光纤放大器的小信号增益和噪声系数。实验结果表明,与普通掺铒光纤放大器相比,二者的自发辐射谱形状基本相同,但是掺铒布拉格光纤放大器的效率较低。通过对光纤模场的理论计算,分析了原因所在并提出相应的改进措施。此外,对两种光纤放大器的饱和增益特性进行了比较。当普通掺铒光纤放大器和布拉格掺铒光纤放大器工作在相同增益水平下时,与前者比,布拉格掺铒光纤放大器具有更大的输入信号动态范围,可以应用于放大器的增益控制领域。Characteristics of Er3＋-doped amplifier based on Bragg fiber with high index core are investigated.Small signal gain and noise figure are measured for forward pump configuration and backward pump configuration.The results show that,compared with conventional Er3＋-doped fiber amplifier,Bragg fiber amplifier has similar amplified spontaneous emission but lower gain.With the simulation on mode field of doped Bragg fiber,the result is discussed and improving method is proposed.Moreover,characteristics of saturated gain are also studied.It is shown that Bragg fiber amplifier has larger input-dynamic-range and has potential application in automatic gain control.

关 键 词：光纤光学 光纤放大器 布拉格光纤 增益 

分 类 号：TN253[电子电信—物理电子学]