| 低阈值锁模状态可转换的全保偏光纤激光器 |
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| 引用本文： | 袁泉,王天枢,马万卓,林鹏,纪海莹,熊浩.低阈值锁模状态可转换的全保偏光纤激光器[J].应用光学,2021,42(4):755-760. |
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| 作者姓名： | 袁泉 王天枢 马万卓 林鹏 纪海莹 熊浩 |
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| 作者单位： | 1.长春理工大学 空间光电技术国家与地方联合工程研究中心，吉林 长春 130022 |
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| 基金项目： | 国家自然科学基金（61975021） |
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| 摘 要： | 报道了一种可实现低阈值自启动的全保偏九字腔光纤激光器。谐振腔结构中使用相移器降低锁模阈值，当泵浦功率达到120 mW时，便可实现自启动的传统孤子锁模，中心波长为1530 nm，脉冲宽度为614.6 fs。随后泵浦功率逐渐增大到470 mW，实现了从孤子脉冲到类噪声脉冲的转换，在该锁模状态下的激光器输出功率为63.2 mW，对应的类噪声脉冲能量为5.69 nJ。所搭建的激光器具有低锁模阈值、自启动的优势，并且仅通过调节泵浦功率就能够实现超快脉冲和高能量脉冲间的转换，具有广泛的应用价值。
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| 关 键 词： | 保偏光纤激光器 低阈值 孤子 类噪声 |
| 收稿时间： | 2020-12-01 |
Convertible all polarization-maintaining fiber laser in low threshold mode-locked state |
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| Affiliation: | 1.National and Local Joint Engineering Research Center of Space Photoelectric Technology, Changchun University of Science and Technology, Changchun 130022, China2.School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China |
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| Abstract: | An all polarization-maintaining figure-nine cavity fiber laser, which could be self-starting in low threshold state was reported. A phase shifter was used in the resonator structure to reduce the mode-locking threshold. When the pump power reached 120 mW, a self-starting conventional soliton mode-locking could be realized, with the central wavelength of 1530 nm and the pulse width of 614.6 fs. Then the pump power gradually increased to 470 mW, which realized the conversion from soliton pulse to noise-like pulse. In this mode-locking state, the laser output power is 63.2 mW, and the corresponding noise-like pulse energy is 5.69 nJ. The constructed laser has the advantages of low mode-locking threshold, self-starting, and can realize the conversion between ultrafast pulses and high-energy pulses only by adjusting the pump power, which has extensive application values. |
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