Continuous-wave THz difference frequency generation based on kHz-linewidth dual-wavelength single-longitudinal-mode Er-doped fiber laser and DAST organic crystal

被引：9

作者：

Cai, Xun ^{[1
]}

Xie, Tongtong ^{[1
]}

Ruan, Qiujun ^{[1
]}

Pan, Pan ^{[1
]}

Chen, Sijie ^{[1
]}

Luo, Jian ^{[1
]}

Fu, Hongyan ^{[1
]}

Chen, Daru ^{[2
]}

Gao, Shiming ^{[3
]}

机构：

[1] Xiamen Univ, Sch Elect Sci & Engn, Dept Elect Engn, Natl Model Microelect Coll, Xiamen 361000, Peoples R China

[2] Zhejiang Prov Key Lab Opt Informat Detecting & Di, Jinhua 321000, Zhejiang, Peoples R China

[3] Zhejiang Univ, Ctr Opt & Electromagnet Res, Int Res Ctr Adv Photon, State Key Lab Modern Opt,Instrumentat, Hangzhou 310000, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2022年 / 150卷

基金：

中国国家自然科学基金;

关键词：

Single -longitudinal -mode fiber laser; Difference frequency generation; DAST organic crystal; Continuous-wave THz radiation; TERAHERTZ; RADIATION;

D O I：

10.1016/j.optlastec.2022.107912

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, a high-average-power continuous-wave terahertz (CW-THz) radiation based on difference frequency generation (DFG) in a 4-dimethylamino-N-methyl-4-stilbazolium-tosylate (DAST) organic crystal has been experimentally demonstrated. Under the jointly effects of a section of ~4.8 m un-pumped EDF and two uniform fiber Bragg gratings (FBGs) with bandwidth of 0.078 nm and 0.09 nm in the ring fiber laser cavity, two ultra-narrow bandwidth self-tracking filters have been formed, which have paved the way for the formation of single-longitudinal-mode (SLM) operation. THz radiation of ~1.48 THz is generated by collinear phase-matched DFG using a stable dual-wavelength single-longitudinal-mode Er-doped fiber laser (DWSLM-EDFL) and a DAST crystal. A maximum THz radiation with average output power as high as 68.8 mu W has been obtained in the experiment. The highest optical-to-THz conversion efficiency is estimated to be ~8.19 x 10(-5).

引用

页数：6

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