一种全保偏光纤型高效宽带红外DFG光梳

量子电子学报 ›› 2019, Vol. 36 ›› Issue (4): 428-433.

一种全保偏光纤型高效宽带红外DFG光梳

马金栋¹,路桥¹,段典²,姚波²,毛庆和²

1中国科学技术大学环境科学与光电技术学院，合肥，230026 2中国科学院安徽光学精密机械研究所，安徽省光子器件重点实验室，合肥，230031

收稿日期:2018-12-03 修回日期:2018-12-04 出版日期:2019-07-28 发布日期:2019-07-11
通讯作者: 毛庆和 E-mail:mqinghe@aiofm.ac.cn
作者简介:马金栋(1989—)，男，博士研究生，主要从事超短脉冲光纤激光技术的研究。E-mail：mjdah@mail.ustc.edu.cn
基金资助:
Strategic Priority Research Program of the Chinese Academy of Sciences (中国科学院战略性先导科技专项（B类），XDB21010300); National Natural Science Foundation of China (国家自然科学基金，61377044, 61805258); National Key Research and Development Program of China (国家重点研发计划，2017YFB0405100)

An all-polarization-maintaining fiber-type infrared DFG comb with wide bandwidth and high conversion efficiency

MA Jindong1,2, LU Qiao2, DUAN Dian2, YAO Bo2, MAO Qinghe1,2

1 School of Environmental Science & Optoelectronic Technology, University of Science and Technology of China, Hefei, 230026, China 2 Anhui Provincial Key Laboratory of Photonics Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China

Received:2018-12-03 Revised:2018-12-04 Published:2019-07-28 Online:2019-07-11
Contact: 毛庆和(1963—)，男，研究员，博士生导师，主要从事纤维光学、激光物理与器件及其应用技术等方面的研究。 E-mail:mqinghe@aiofm.ac.cn

摘要/Abstract

摘要： 本文报道一种基于锁模掺铒光纤激光器和GaSe晶体的光纤型宽带高效差频产生（DFG）光梳。该DFG光梳采用全保偏光纤设计以获得高线偏振度的基频脉冲，采用非线性脉冲光纤放大技术以获取宽带窄脉宽高峰值功率的双色基频脉冲，从而确保了DFG光梳的宽带和高转换效率特性以及DFG过程的稳定性。该DFG光梳在中心波长8.15 μm处带宽达1.7 μm，仅受GaSe晶体相位匹配接受带宽的限制，对应的DFG转换效率达1%，远高于常规光纤型DFG光梳约0.4%的转换效率。

关键词: 光学频率梳, 差频产生（DFG）, 保偏光纤, 激光脉冲

Abstract: A broadband difference frequency generation (DFG) comb with high conversion efficiency based on a mode-locked Erbium-doped fiber laser and GaSe crystal is presented in this paper. All-polarization-maintaining fiber structure is used to obtain high degrees of linear polarizations, and the nonlinear pulse fiber amplification technique is utilized to achieve wide bandwidths, short durations and high peak powers, for the two-color fundamental pulses. This offers the DFG comb the properties of wide bandwidth and high conversion efficiency, the DFG process very stable. The experimental results show that, the achievable bandwidth of the DFG comb near 8.15 μm reaches 1.7 μm, only limited by the phase-matching acceptance bandwidth of the crystal; the DFG conversion efficiency is as high as 1%, much higher than that for the fiber-type DFG comb reported so far, which is about 0.4%.

Key words: optical frequency comb (OFC), difference frequency generation (DFG), polarization-maintaining (PM) fiber, laser pulse

中图分类号:

O437

马金栋路桥段典姚波毛庆和. 一种全保偏光纤型高效宽带红外DFG光梳[J]. 量子电子学报, 2019, 36(4): 428-433.

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