Fast modulation of a long-wave infrared laser based on the two-photon absorption of CO2
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.
Authors
- Ziren Zhu (ORCID: https://orcid.org/0000-0001-6751-4987)
- Liemao Hu
- Changjun Ke
- Fangjin Ning
- Ziming Wang (ORCID: https://orcid.org/0009-0009-6284-6451)
- Hui Li (ORCID: https://orcid.org/0000-0002-4839-4614)
- Hai Wang (ORCID: https://orcid.org/0009-0009-0450-5659)
- Yijun Zheng (ORCID: https://orcid.org/0000-0002-3651-8368)
- Wanli Zhao
- Zhiyong Li (ORCID: https://orcid.org/0000-0003-0812-326X)
- Zhenzhen Xie
- Rongqing Tan (ORCID: https://orcid.org/0000-0002-4220-2183)
- Zhaoxiang Wang
- Yu Liu (ORCID: https://orcid.org/0009-0006-3110-8884)
Institutions
- Chinese Academy of Sciences (CN)
- National Engineering Research Center of Electromagnetic Radiation Control Materials (CN)
- Aerospace Information Research Institute (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2024-11-18
- DOI
- https://doi.org/10.1063/5.0242976
- Citations
- 1
- Primary Topic
- Solid State Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.21