基于45°倾斜光纤光栅的光纤激光频率梳(特邀)
Fiber Laser Frequency Comb Based on a 45° Tilted Fiber Grating(Invited)
黄梓楠 1黄千千 1田昊晨 2闫志君 3邹萌 3孙敬华 4顾澄琳 5王开 1徐子硕 1李卫淅 1戴礼龙 1梁新栋 6牟成博1
作者信息
- 1. 上海大学特种光纤与光接入网重点实验室,上海先进通信与数据科学研究院,特种光纤与先进通信国际合作联合实验室,上海 200444
- 2. 中国计量科学研究院,北京 100029
- 3. 华中科技大学光学与电子信息学院下一代互联网接入系统国家工程实验室,湖北 武汉 430074
- 4. 东莞理工学院电信工程与智能化学院,广东 东莞 523808
- 5. 华东师范大学精密光谱科学与技术国家重点实验室,上海 200062
- 6. 浙江省引力波精密测量重点实验室国科大杭州高等研究院,浙江 杭州 310024
- 折叠
摘要
利用45°倾斜光纤光栅(45°-TFG)作为光纤型起偏器,搭建了一台高可靠性高稳定性的掺铒锁模光纤激光器,并以此为基础实现了重复频率frep和载波包络偏移频率fceo的精确锁定.当泵浦功率为228 mW时,基于45°-TFG的锁模激光振荡器可实现3 dB光谱带宽为60.4 nm、脉冲宽度为68 fs的超短脉冲输出,在12 h内功率的均方根稳定性达到0.033%,且在较大的泵浦范围内均能维持较好的展宽锁模状态.经过自主搭建的非线性脉冲放大、超连续谱产生以及f-2f自参考拍频干涉光路,获得了信噪比为32 dB的fceo信号.最后通过搭建基于锁相环的主动反馈控制电路,将frep和fceo信号溯源至一台GPS时频系统,最终测得frep和fceo信号归一化后在1 s门时间内频率稳定度为2.38×10-12和6.41×10-16.这是首次实现基于45°-TFG的光纤激光频率梳,表明了基于45°-TFG的锁模光纤激光器在实际应用中的潜力.
Abstract
A highly reliable and stable erbium-doped mode-locked fiber laser was constructed using a 45°-tilted fiber grating(45°-TFG)as a fiber polarizer.Based on this,precise signal stabilization of the repetition frequency frep and carrier-envelope offset frequency fceo was achieved.When the pump power is 228 mW,the mode-locked laser oscillator based on a 45°-TFG can achieve an ultra-short pulse output of 3 dB with a spectral bandwidth of 60.4 nm and a pulse width of 68 fs.The root mean square stability of the power reaches 0.033%within 12 hours,and it can maintain a good stretched mode-locked state over a large pump range.After self-built chirped pulse amplification,super-continuum spectrum generation,and f-2f self-reference beat interference optical path,fceo signal with a signal-to-noise ratio of 32 dB was obtained.Finally,by building an active feedback control circuit based on a phase-locked loop,the frep and fceo signals were traced back to a GPS time-frequency system,and the frequency instability of the frep and fceo signals was measured to be 2.38×10-12 and 6.41×10-16 within an average time of 1 second.This is the first implementation of a fiber laser frequency comb based on a 45°-TFG,indicating the potential of a 45°-TFG based mode-locked fiber laser in practical applications.
关键词
锁模光纤激光器/光纤光栅/非线性偏振旋转/光纤激光频率梳Key words
mode-locked fiber laser/fiber grating/nonlinear polarization rotation/optical frequency comb引用本文复制引用
基金项目
国家自然科学基金(62135007)
国家自然科学基金(61975107)
广东省基础与应用基础研究基金区域联合基金重点项目(2020B1515120041)
之江实验室开放基金(K2022MH0AB01)
中国科学院空间主动光电技术重点实验室开放基金(2021-ZDKF-01)
出版年
2024
NETL
NSTL
万方数据