中国光学（中英文）2026，Vol.19Issue(3)：526-533,8.DOI:10.37188/CO.2025-0149
基于L波段激光差频的连续精调谐太赫兹辐射源
Continuous fine-tunable terahertz radiation source based on L-band laser difference frequency
摘要
Abstract
This paper presents a continuous fine-tunable terahertz radiation source based on L-band laser dif-ference frequency.A fully polarization-maintaining fiber link,including polarization-maintaining isolators,polarization-maintaining couplers,and polarization-maintaining erbium-doped fiber amplifiers,was designed to keep the polarization states of the two beams consistent.By using the difference frequency of L-band dual lasers to excite the InGaAs high-performance photoconductive antenna,continuous terahertz radiation ran-ging from 0.1 to 2.7 THz was generated within the wavelength range of 1 568.8 to 1 589.6 nm.The power and frequency of the terahertz waves were respectively tested using a Golay cell detector and a terahertz scan-ning Fabry-Perot interferometer.The results show that the power instability of the terahertz wave within 25 minutes is within 4%,and the frequency measurement results at 0.5 THz and 1 THz are highly consistent with the frequency interval of the L-band dual lasers.Additionally,within the range of 0.9 to 1 THz,a high-precision tuning of 1 GHz was achieved,corresponding to a wavelength interval of 0.008 nm.This continu-ously fine-tunable terahertz radiation source has high application potential in high-precision spectral detec-tion and other fields.关键词
太赫兹辐射源/L波段差频/连续精调谐Key words
Terahertz radiation source/L-band difference frequency/continuous fine tuning分类
信息技术与安全科学引用本文复制引用
李明星,吴泽鹏,蔚佳昕,贺文君,游亚军,刘毅,丑修建,张乐..基于L波段激光差频的连续精调谐太赫兹辐射源[J].中国光学（中英文）,2026,19(3):526-533,8.基金项目
国家自然科学基金项目(No.U23A20639,No.U2341210,No.62401524,No.62371426,No.92364107,No.62450003) （No.U23A20639,No.U2341210,No.62401524,No.62371426,No.92364107,No.62450003）
广东省基础与应用基础研究基金项目(No.2023A1515110148)Supported by National Natural Science Foundation of China(No.U23A20639,No.U2341210,No.62401524,No.62371426,No.92364107,No.62450003) （No.2023A1515110148）
Basic and Applied Basic Research Foundation of Guangdong Province(No.2023A1515110148) （No.2023A1515110148）
