被动锁模Yb3+光纤环形腔激光器的研究
Passive mode-locked Yb3+-doped fiber ring laser
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摘要: 采用974 nm半导体激光器作为泵浦源，超高掺杂Yb3+光纤作为增益介质，利用光纤的非线性偏振旋转效应，得到稳定的ps量级锁模光脉冲。泵浦功率220 mW时，激光器锁模阈值功率150 mW，输出功率26 mW，锁模光脉冲中心波长1 046 nm，3 dB带宽6.01 nm，20 dB带宽16 nm，脉宽22 ps，重复频率20 MHz。与同类光纤激光器相比，该激光器输出功率高，具有更好的稳定性。Abstract: Using ultra-highly doped Yb3+ fiber as gain medium for the first time in China, pumped by 974 nm LD and passively mode-locked by nonlinear polarization rotation effect of the fiber, stable mode-locked fiber ring laser is obtained. The mode-locked threshold power of the laser is 150 mW and the output power is 26 mW with a pump power of 220 mW. The center wavelength of the mode-locked pulse is 1 046 nm with 3 dB bandwidth of 6.01 nm, 20 dB bandwidth of 16nm, pulsewidth of 22 ps and repetition rate of 20 MHz. Compared with similar fiber lasers, the laser has higher output power and better stability.
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Key words:
- fiber laser /
- passive mode-locking /
- ultra highly doped /
- yb3+ fiber
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