Tunable single-longitudinal-mode Ytterbium all fiber laser with saturable-absorber-based auto-tracking filter

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• 作者：Feifei Yin ; Sigang Yang ; ^{ysg@tsinghua.edu.cn} ; Hongwei Chen ; Minghua Chen ; Shizhong Xie
• 关键词：Fiber ring lasers ; Single longitudinal mode ; Tunable lasers ; Ytterbium lasers
• 刊名：Optics Communications
• 出版年：2012
• 期刊代码：50_00304018
• 类别：ph
• 出版时间：15 May, 2012
• 卷：285
• 期：10-11
• 页码：2702-2706
• 文件大小：920 K

摘要

A broadband tunable, single-longitudinal-mode (SLM) Ytterbium fiber laser with unpumped Ytterbium-doped Sagnac loop is proposed and demonstrated experimentally. The unpumped Ytterbium-doped Sagnac loop is employed as a saturable absorber based auto-tracking filter to ensure single-longitudinal-mode oscillation. And a tunable band pass optical filter with large tuning range is applied to achieve broadband tuning ability. With 1-m Ytterbium-doped fiber as the gain medium, the SLM operation is achieved with over 60-nm wavelength tuning range at 160-mW pump power. The laser is very stable with output power of about 3 dBm and optical signal to noise ratio of higher than 50 dB in all the 60-nm tuning range.