光学学报, 1995, 15 (8): 1024, 网络出版: 2007-08-17
掺铒光纤非线性折射率的理论研究
Nonlinear Refractive Index in Er3+-Doped Optical Fiber
摘要
建立了掺杂光纤折射率的普适公式,并利用激光运动方程,推导出折射率随泵浦光强的变化关系,给出了在典型参数下的折射率-光功率变化曲线。发现,在激光中心频率1.53 μm附近,当泵浦光强远大于泵浦阈值时,掺铒光纤折射率变化量达10-7量级(不计光克尔效应),这比在相同泵浦时光克尔效应引起的变化大30倍左右,并且这一变化量存在极限,这一极限由掺铒光纤的特性参数唯一确定。
Abstract
Intensity-dependent refractive index due to the changes of the Er3+ concentration distribution between the ground level and upper level in Er3+ doped optical fiber has been theoretically analysized. The linit of the refractive index change at any wavelength around the gain center wavelength 1.53 μm appears when the toeal Er3+ concentration distirbutes in the upper level corresponding to the infinite pumn power.
宋开, 李玲, 叶培大. 掺铒光纤非线性折射率的理论研究[J]. 光学学报, 1995, 15(8): 1024. 宋开, 李玲, 叶培大. Nonlinear Refractive Index in Er3+-Doped Optical Fiber[J]. Acta Optica Sinica, 1995, 15(8): 1024.