Approaching 100 nJ pulse energy output from a mode-locked photonic crystal fiber laser

作者：Song You Jian; Hu Ming Lie^*; Xie Chen; Chai Lu; Wang Qing Yue

来源：Acta Physica Sinica, 2010, 59(10): 7105-7110.

• photonic crystal fiber
• fiber laser
• all normal dispersion mode-locking
• multi-pass cavity

Pulse energy directly output from a mode-locked fiber laser approaching one hundred nanojoule is demonstrated. The fiber laser is based on a sigma-shaped cavity design. A segment of single polarization Yb-doped large mode area photonic crystal fiber acts as gain medium. A semiconductor saturable absorber mirror is used for self-starting mode-locking operation. The fiber laser works in an all normal dispersion mode-locking regime with no intracavity dispersion compensation introduced in the laser. A long multi-pass cavity is used to reduce the repetition rate of the fiber laser. Direct output pulse energy of 97 nJ with an average power of 1. 08 W is achieved at a low repetition rate of 11. 1 MHz. The pulse duration is 4. 17 ps, which can be extracavity dechirped to 740 fs.

• 出版日期2010-10
• 单位天津大学