线性光采样是一种测量基于先进调制码型的高速光信号的有效手段,而被动锁模光纤激光器是其实施所需的关键组件.本文在介绍线性光采样工作原理的基础上,首次分析得到被动锁模光纤激光器重复频率与待测信号光线宽的约束关系,对于正交相移...线性光采样是一种测量基于先进调制码型的高速光信号的有效手段,而被动锁模光纤激光器是其实施所需的关键组件.本文在介绍线性光采样工作原理的基础上,首次分析得到被动锁模光纤激光器重复频率与待测信号光线宽的约束关系,对于正交相移键控(QPSK)信号,当信号光线宽与采样光脉冲重复频率的比值小于1.5×10-3时,高速信号的相位噪声对线性光采样带来的损伤可以忽略不计.利用95.984 MHz重复频率的被动锁模光纤激光器对线宽为100 k Hz速率为28 Gbaud的QPSK信号开展相关实验,通过标准数字相干接收算法可以得到与传统高速示波器相同的星座图,理论分析与实验结果完全符合.这一研究结果有助于线性光采样用被动锁模光纤激光器的优化设计.展开更多
We report a passively mode-locked high repetition rate erbium-doped femtosecond fiber laser via nonlinear polarization rotation, with a fundamental repetition rate of 101.94 MHz. The output power is 34 mW when pumped ...We report a passively mode-locked high repetition rate erbium-doped femtosecond fiber laser via nonlinear polarization rotation, with a fundamental repetition rate of 101.94 MHz. The output power is 34 mW when pumped by a single mode fiber coupled laser diode at 370 mW. The spectral width is 25 nm, corresponding to a transform limited pulse width of 105 fs.展开更多
文摘线性光采样是一种测量基于先进调制码型的高速光信号的有效手段,而被动锁模光纤激光器是其实施所需的关键组件.本文在介绍线性光采样工作原理的基础上,首次分析得到被动锁模光纤激光器重复频率与待测信号光线宽的约束关系,对于正交相移键控(QPSK)信号,当信号光线宽与采样光脉冲重复频率的比值小于1.5×10-3时,高速信号的相位噪声对线性光采样带来的损伤可以忽略不计.利用95.984 MHz重复频率的被动锁模光纤激光器对线宽为100 k Hz速率为28 Gbaud的QPSK信号开展相关实验,通过标准数字相干接收算法可以得到与传统高速示波器相同的星座图,理论分析与实验结果完全符合.这一研究结果有助于线性光采样用被动锁模光纤激光器的优化设计.
基金Supported by National Science and Technology Supporting Program of China (Grant No. 2006BAF03A20)High-Tech Research and Development Program of China
文摘We report a passively mode-locked high repetition rate erbium-doped femtosecond fiber laser via nonlinear polarization rotation, with a fundamental repetition rate of 101.94 MHz. The output power is 34 mW when pumped by a single mode fiber coupled laser diode at 370 mW. The spectral width is 25 nm, corresponding to a transform limited pulse width of 105 fs.
