应用物理  >> Vol. 4 No. 6 (June 2014)

谐波锁模类噪声方波脉冲掺铒光纤激光器的研究
Harmonic Mode-Locked Noise-Like Rectangle Pulses in an Erbium-Doped Fiber Laser

DOI: 10.12677/APP.2014.46015, PDF, , 下载: 2,609  浏览: 10,080  国家自然科学基金支持

作者: 罗智超, 郑旭武, 罗爱平, 徐文成:华南师范大学信息光电子科技学院,广东省微纳光子功能材料与器件重点实验室,广州

关键词: 光纤激光器类噪声方波脉冲谐波锁模Fiber Laser Noise-Like Rectangular Pulse Harmonic Mode Locking

摘要: 本文对长腔“8”字型掺铒光纤激光器中产生谐波锁模方波脉冲进行了实验研究。该类型脉冲具有光滑的宽带光谱,在示波器上显示为方波脉冲,但自相关迹证实其为类噪声脉冲,即类噪声方波脉冲。实验中通过调节激光器腔内参数,如偏振控制器和泵浦功率等,获得了高达5阶的谐波锁模类噪声方波脉冲。实验结果表明,光纤激光器内产生的类噪声方波脉冲并非可以无限增大脉冲能量,而是在一定条件下会产生脉冲分裂,出现谐波锁模方波脉冲现象。研究结果有利于进一步理解类噪声方波脉冲的机理和特性。
Abstract: We reported on the generation of harmonically mode-locked rectangular pulses in a long cavity figure-eight fiber laser. The mode-locked spectrum was broad and smooth and its pulse profile appeared to be the rectangular shape on the oscilloscope. However, the pulse type was confirmed as noise-like pulse by an autocorrelator, namely noise-like rectangular pulse. By adjusting the laser parameters, such as polarization controllers and pump power, up to 5th harmonic mode- locked noise-like rectangular pulse was achieved. It indicates that the energy of noise-like rectangular pulse in the fiber laser cannot be increased infinitely, but it may split into multiple pulses, leading to the phenomenon of harmonically mode-locked rectangular pulse. The obtained results may be useful for enhancing the understanding of the mechanism and characteristics of noise-like rectangular pulse.

文章引用: 罗智超, 郑旭武, 罗爱平, 徐文成. 谐波锁模类噪声方波脉冲掺铒光纤激光器的研究[J]. 应用物理, 2014, 4(6): 107-112. http://dx.doi.org/10.12677/APP.2014.46015

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