Fast modulation of a long-wave infrared laser based on the two-photon absorption of CO2

被引：0

作者：

Xie, Zhenzhen ^{[1
,2
]}

Li, Zhiyong ^{[1
,2
]}

Zhu, Ziren ^{[1
,2
]}

Liu, Yu ^{[1
,2
]}

Wang, Hai ^{[1
,2
]}

Wang, Ziming ^{[1
,2
]}

Ning, Fangjin ^{[1
]}

Li, Hui ^{[1
]}

Wang, Zhaoxiang ^{[1
]}

Hu, Liemao ^{[1
]}

Ke, Changjun ^{[1
]}

Zheng, Yijun ^{[1
]}

Zhao, Wanli ^{[3
]}

Tan, Rongqing ^{[1
,2
]}

机构：

[1] Laser Engineering Center, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing,100094, China

[2] School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing,101408, China

[3] National Key Laboratory of Electromagnetic Space Security, Tianjin,300308, China

来源：

Applied Physics Letters | 2024年 / 125卷 / 21期

基金：

中国国家自然科学基金;

关键词：

Infrared devices - Infrared lasers - Light modulators - Two photon processes;

D O I：

10.1063/5.0242976

中图分类号：

学科分类号：

摘要：

In this work, we report a long-wave infrared (LWIR) modulator based on the two-photon absorption of CO2 gas. The effect of gas pressure and laser power on the modulation under different wavelengths is discussed. A maximum modulation depth of 21.5% with a rise time (full time) less than 20 ns for a 9.36 μm laser was achieved. The gaseous modulator, which adopts a 2.75 μm laser as the pumping source, is capable of converting the pulse characteristics of the pump light into the modulation of the long-wave infrared light. It demonstrates promising potential for applications in the rapid optical modulation of LWIR lasers. © 2024 Author(s).

引用

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