自激发多波长可开关掺铒光纤激光器  

Self-seeded Multi-wavelength Switchable Erbium-doped Fiber Laser

作　　者：匡芬[1] 叶志清 

机构地区：江西师范大学物理与通信电子学院[1] 江西省光电子与通信重点实验室,南昌,330022[2]

出　　处：《光子学报》2012年第12期1460-1463,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(No.60967002);江西省教育厅科研项目(No.GJJ10401);江西省自然科学基金(No.20114BAB202003)资助

摘　　要：波长可开关光纤激光器可以选择多波长光纤激光器中的一个或多个波长输出,支持光网络中多个波长的动态分配,适应现代光纤通信系统信道数越来越多的波分复用和密集波分复用的发展方向.本文提出并实现了一种自激发多波长可开关掺铒光纤激光器.该激光器通过一个980nm泵浦进行抽运,使用掺铒光纤作为增益介质,产生1 550nm光谱,并通过一个环形结构返回,从而实现自激发的过程,降低了实验成本.实验使用一个含有两段保偏光纤的Sagnac环作为滤波器.通过调整Sagnac环形滤波器内偏振控制器的角度,改变Sagnac环形滤波器的腔内增益,可以让光纤光栅反射出来的波长选择性通过,从而实现波长的开关功能.实验证明,通过调整Sagnac滤波器的腔内增益而让多波长选择性通过,是一种有效的实现波长可开关功能的方法.Multi-wavelength switchable optic fiber laser can select one or several wavelengths of the multi-wavelength. It supports the dynamic allocation of the wavelengths in the optic network, which adapts the development of the wavelength division multiplexing(WDM) and dense wavelength division multiplexing(DWDM) systems with more channel numbers in modern optical fiber communication system. A self-seeded multi-wavelength switchable Erbium-doped fiber laser is proposed and experimentally demonstrated in this paper. The Erbium-doped fiber is pumped by a 980 nm pump to produce 1 550 nm spectra, and it returns back through a ring structure so as to realize the self-excitation and to reduce the cost of the experiment. A Sagnac ring with two segments of polarization maintaining optical fibre is used as a filter. By adjusting the rotation angles of the polarization controller in the circle of Sagnac filter, the cavity gain of the Sagnac filter changes. It allows the wavelengths reflected by the fiber Bragg Grating pass selectively, so as to realize the wavelength switchable function. The experiment proved that it is an effective way to realize the multi-wavelength switchable function through adjusting the cavity gain of the Sagnac Filter and letting the wavelengths pass selectively.

关 键 词：波长可开关 光纤光栅 Sagnac滤波器 掺铒光纤 自激发 

分 类 号：TN2[电子电信—物理电子学]