被动谐波锁模掺Yb3+光纤环形激光器
Passive harmonically mode-locked Yb3+-doped fiber laser
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摘要: 利用光纤的非线性偏振旋转效应产生可饱和吸收体的锁模机制，从掺Yb3+光纤环形激光器中得到稳定高阶谐波锁模光脉冲。理论分析了工作于正色散区的掺Yb3+光纤环形激光器的特性。实验中观测到了掺Yb3+光纤环形激光器3种不同演化方式产生高阶锁模光脉冲。4阶谐波锁模脉冲（107.2 MHz重复频率）经过1 m长高掺杂Yb3+光纤放大器放大后产生了平均功率100 mW，脉宽22.8 ps的脉冲，最后经过光栅压缩得到了平均输出功率20 mW，脉宽307 fs，脉冲中心波长1 051.2 nm，带宽13.76 nm的激光。Abstract: The experimental results of the stable high-order harmonically mode-locked pulses generation, amplification and compression in Yb3+-doped fiber laser system were reported. Using nonlinear polarization rotation(NPR) effect, the artifical saturable absorber was generated and the stable high-order harmonically mode-locked pulses were generated from Yb3+-doped fiber ring laser. The characteristics of Yb3+-doped mode-locked fiber laser were analyzed theoretically. Three different ways were found, with which high-order harmonically mode-locked pulses were generated from Yb3+-doped mode-locked fiber laser. The stable 4th harmonically mode-locked (107.2 MHz repetition rate) pulses were amplified to an average power of 100 mW and pulse width of 22.8 ps through an amplifier with 1 m high concentrati
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Key words:
- fiber laser /
- passive mode-locked /
- harmonic mode-locked /
- pulse compression
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