Deng Yujun, Knox Wayne H
The Institute of Optics, University of Rochester, Rochester, New York 14627-0186, USA.
Opt Lett. 2004 Sep 15;29(18):2121-3. doi: 10.1364/ol.29.002121.
We demonstrate, for the first time to our knowledge, a self-starting passive harmonic mode-locked femtosecond Yb3+-doped fiber laser with a scalable repetition rate of up to 585 MHz and >45 dB of supermode suppression. Pulse-to-pulse jitter of approximately 14 ps is measured by optical cross correlation at the ninth harmonic, and radiofrequency (RF) spectrum measurements show that certain correlations exist between pulses in harmonic mode. Our results suggest that one of the proposed passive harmonic mode-locking mechanisms may be dominant for this laser.
据我们所知，我们首次展示了一种自启动被动谐波锁模飞秒掺镱光纤激光器，其重复频率可扩展至高达585 MHz，超模抑制超过45 dB。通过在九倍频处的光学互相关测量，测得脉冲间抖动约为14 ps，射频（RF）频谱测量表明在谐波模式下脉冲之间存在某些相关性。我们的结果表明，所提出的被动谐波锁模机制之一可能是该激光器的主导机制。
