调Q锁模类噪声方波脉冲掺铒光纤激光器 |
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引用本文: | 梁佩茹,宁秋奕,陈伟成.调Q锁模类噪声方波脉冲掺铒光纤激光器[J].红外与激光工程,2018,47(8):803009-0803009(6). |
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作者姓名: | 梁佩茹 宁秋奕 陈伟成 |
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作者单位: | 1.佛山科学技术学院 物理与光电工程学院,广东 佛山 528000 |
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基金项目: | 国家自然科学基金(11604049);广东省特种光纤材料与器件工程技术研究开发中心(华南理工大学)开放课题;广东省大学生创新创业训练计划(201611847093) |
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摘 要: | 对基于非线性偏振旋转技术的L波段掺铒被动锁模光纤激光器中产生调Q锁模类噪声方波脉冲进行了实验研究。该类型脉冲中调Q包络内部包含的脉冲是基频方波,通过自相关迹证实该方波为类噪声脉冲。为了容易实现类噪声方波脉冲输出,将一段250 m普通单模光纤引进激光腔内。适当调节腔内的偏振控制器和泵浦功率,获得了基频为778.21 kHz的连续波锁模类噪声方波脉冲和由3.81 kHz可调谐到9.01 kHz的重复频率,单个调Q包络最高能量为1.06 J的调Q锁模类噪声方波脉冲。研究结果有利于进一步理解被动锁模光纤激光器中类噪声脉冲和调Q锁模的机理和特性。
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关 键 词: | 类噪声方波脉冲 调Q锁模 光纤激光器 |
收稿时间: | 2018-03-05 |
Q-switched mode-locking noise-like rectangular pulses erbium-doped fiber laser |
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Affiliation: | 1.School of Physics and Optoelectronic Engineering,Foshan University,Foshan 528000,China |
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Abstract: | The Q-switched mode-locking(QML) rectangular pulses in the L-band erbium-doped passively mode-locked fiber laser based on nonlinear polarization rotation technique was researched experimentally. The Q-switched envelope of this type of pulses contained the rectangular pulse with fundamental repetition rate,which was confirmed as noise-like pulse by an autocorrelator. A 250 m long section of single mode fiber was inserted into the cavity to ensure the noise-like rectangular pulses easy to be obtained. By carefully adjusting polarization controllers and pump power in the cavity, both the continuous-wave mode-locking noise-like rectangular pulses with fundamental repetition rate of 778.21 kHz and the QML noise-like rectangular pulses with tunable repetition rate from 3.81 kHz to 9.01 kHz and the highest energy of Q-switched pulse envelop 1.06 J were achieved. The research results further reveal the fundamental physics of noise-like pulses and QML operation in the passively mode-locked fiber lasers. |
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