中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室, 陕西 西安 710119
利用自行开发的高稳定、低抖动和重复频率可调的“σ”型被动锁模光纤激光器作为高性能光学取样源，与待测的80 Gb/s光脉冲信号同时输入到100 m高非线性光纤中，通过四波混频效应实现了对被测光信号的全光采样。然后利用自行开发的数字信号处理与计算机图形显示软件，精确地重现了被测试的基于RZ码型的80 Gb/s光脉冲信号波形图。同时，还利用该光学取样示波器实验样机系统对重复频率为10 GHz、脉宽为1.8 ps的商用半导体主动锁模激光器的输出波形进行测量，所显示的脉冲宽度值为2.0 ps。这表明开发出的实验样机系统的时间分辨率优于900 fs。
光学器件 全光取样 非线性 超短脉冲 锁模激光器
Author Affiliations
Abstract
1 State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3 Department of Electrical, Computer and Communications Engineering, London South Bank University, London SE1 0AA, UK
An asynchronous optical sampling scheme based on four-wave mixing (FWM) in highly nonlinear fiber (HNLF) is experimentally demonstrated. Based on this scheme, 10-GHz input pulse train with 1.8-ps pulse width is successfully sampled in 100-m HNLF. A single pulse at 10 GHz with 2.3-ps pulse width is rebuilt by using a 50-MHz frequency tunable free-running fiber laser as the sampling pulse source (SPS). 40-GHz pulse train is used as the input signal. The rebuilt waveforms, together with the low-jitter eye diagram, are also presented.
全光采样 四波混频 高度非线性光纤 060.7140 Ultrafast processes in fibers 060.4370 Nonlinear optics, fibers 060.2360 Fiber optics links and subsystems 060.2330 Fiber optics communications Chinese Optics Letters
2010, 8(7): 630
