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基于三阶色散补偿的光纤飞秒激光放大系统

Femtosecond Fiber Amplification System Based on Third-Order Dispersion Compensation Technique

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摘要

采用光纤啁啾脉冲放大技术,搭建了基于负三阶色散补偿的高功率、高脉冲质量全光纤飞秒激光放大系统。利用保偏大模场双包层掺镱光纤作为增益介质,负三阶色散光纤和普通保偏单模光纤作为混合型光纤展宽器,在实现时域展宽的同时,对放大系统中的正三阶色散进行预补偿,从而获得高质量、高功率的激光脉冲输出。在实验中使用混合展宽器和1200 line·mm-1光栅对作为压缩器,使系统的净三阶色散量趋近于零,最终获得了重复频率为111 MHz,放大后输出平均功率为8.5 W,中心波长为1035 nm,去啁啾后脉冲宽度为217 fs的高脉冲质量飞秒激光输出。

Abstract

A high-power and high-pulse-quality femtosecond all fiber laser amplification system is constructed based on the negative third-order dispersion compensation with fiber chirped pulse amplification technology. In the proposed system, the polarization maintaining large mode field of the double-clad Yb-doped fiber and the negative third-order dispersion fiber and the normal polarization maintaining fiber are utilized as the gain medium and mixed fiber stretcher, respectively. Moreover, a pre-compensation of third-order dispersion is implemented while the widening of the time domain is realized, therefore a high-quality and high-power laser is obtained. In the experiment, we use the hybrid fiber stretcher and a 1200 line·mm-1 grating-pair as the compressor, and make the net third-order dispersion of the system approach zero. Consequently, we obtain a high-quality dechirp pulse with central wavelength of 1035 nm and pulse duration of 217 fs. In addition, average output power of 8.5 W at repetition rate of 111 MHz is achieved.

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中图分类号:TN248

DOI:10.3788/lop55.051404

所属栏目:激光器与激光光学

基金项目:国家自然科学基金(U1730115,61535009,11527808)、强场激光物理国家重点实验室开放基金

收稿日期:2017-11-06

修改稿日期:2017-11-19

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郝静宇:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072
刘博文:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072
宋寰宇:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072
文亮:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072
牛佳:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072
柴路:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072
胡明列:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072
王清月:天津大学精密仪器与光电子工程学院超快激光研究室, 光电信息技术教育部重点实验室, 天津 300072

联系人作者:刘博文(bwliu@tju.edu.cn)

备注:郝静宇(1992—),女,硕士研究生,主要从事飞秒激光振荡器、飞秒激光放大器方面的研究。E-mail: hjyyu88@tju.edu.cn

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引用该论文

Hao Jingyu,Liu Bowen,Song Huanyu,Wen Liang,Niu Jia,Chai Lu,Hu Minglie,Wang Qingyue. Femtosecond Fiber Amplification System Based on Third-Order Dispersion Compensation Technique[J]. Laser & Optoelectronics Progress, 2018, 55(5): 051404

郝静宇,刘博文,宋寰宇,文亮,牛佳,柴路,胡明列,王清月. 基于三阶色散补偿的光纤飞秒激光放大系统[J]. 激光与光电子学进展, 2018, 55(5): 051404

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