Direct generation of 128-fs Gaussian pulses from a compensation-free fiber laser using dual mode-locking mechanisms

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• 作者：Junsong Peng ; Li Zhan ; ^{lizhan@sjtu.edu.cn} ; Zhaochang Gu ; Kai Qian ; Shouyu Luo ; Qishun Shen
• 关键词：Fiber laser ; Ultrafast ; Gaussian ; Kelly sidebands ; Mode-locking
• 刊名：Optics Communications
• 出版年：2012
• 出版时间：1 March 2012
• 年：2012
• 卷：285
• 期：5
• 页码：731-733
• 全文大小：437 K

文摘

We have experimentally demonstrated the direct generation of 128-fs pulses in an all-anomalous-dispersion all-fiber mode-locked laser. The laser is free of dispersion compensation in the cavity based on standard single mode fiber (SMF). The time-bandwidth product is 0.536. The laser is achieved by using two mode-lockers, one is nonlinear polarization rotation (NPR), and the other is nonlinear amplifying loop mirror. The coexistence of dual mode-locking mechanisms can decrease the cavity length to 12-m, and also results in producing high-quality pulses with a Gaussian shape both on the pulse profile and spectrum, but without Kelly sidebands.