Coherent 420 nm laser beam generated by four-wave mixing in Rb vapor with a single continuous-wave laser

doi:10.1088/1674-1056/ab75d9

中国物理B ›› 2020, Vol. 29 ›› Issue (4): 43203-043203.doi: 10.1088/1674-1056/ab75d9

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Coherent 420 nm laser beam generated by four-wave mixing in Rb vapor with a single continuous-wave laser

Hao Liu(刘浩), Jin-Peng Yuan(元晋鹏), Li-Rong Wang(汪丽蓉), Lian-Tuan Xiao(肖连团), Suo-Tang Jia(贾锁堂)

1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

收稿日期:2020-01-07 修回日期:2020-02-04 出版日期:2020-04-05 发布日期:2020-04-05
通讯作者: Jin-Peng Yuan, Li-Rong Wang E-mail:yjp@sxu.edu.cn;wlr@sxu.edu.cn
基金资助:
Project supported by the National R&D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grant Nos. 61875112, 61705122, 91736209, and 61728502), the Program for Sanjin Scholars of Shanxi Province, China, the Applied Basic Research Project of Shanxi Province, China (Grant No. 201701D221004), the Key Research and Development Program of Shanxi Province for International Cooperation, China (Grant No. 201803D421034), and 1331KSC.

Coherent 420 nm laser beam generated by four-wave mixing in Rb vapor with a single continuous-wave laser

Hao Liu(刘浩)^1,2, Jin-Peng Yuan(元晋鹏)^1,2, Li-Rong Wang(汪丽蓉)^1,2, Lian-Tuan Xiao(肖连团)^1,2, Suo-Tang Jia(贾锁堂)^1,2

1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Received:2020-01-07 Revised:2020-02-04 Online:2020-04-05 Published:2020-04-05
Contact: Jin-Peng Yuan, Li-Rong Wang E-mail:yjp@sxu.edu.cn;wlr@sxu.edu.cn
Supported by:
Project supported by the National R&D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grant Nos. 61875112, 61705122, 91736209, and 61728502), the Program for Sanjin Scholars of Shanxi Province, China, the Applied Basic Research Project of Shanxi Province, China (Grant No. 201701D221004), the Key Research and Development Program of Shanxi Province for International Cooperation, China (Grant No. 201803D421034), and 1331KSC.

摘要/Abstract

摘要： We demonstrate the generation of the coherent 420 nm laser via parametric four-wave mixing process in Rb vapor. A single 778 nm laser with circular polarization is directly injected into a high-density atomic vapor, which drives the atoms from the 5S_1/2 state to the 5D_5/2 state with monochromatic two-photon transition. The frequency up-conversion laser is generated by the parametric four-wave mixing process under the phase matching condition. This coherent laser is firstly certified by the knife-edge method and a narrow range grating spectrometer. Then the generated laser power is investigated in terms of the power and frequency of the incoming beam as well as the density of the atoms. Finally, a 420 nm coherent laser with power of 19 μW and beam quality of M_x² =1.32, M_y² =1.37 is obtained with optimal experimental parameters. This novel laser shows potential prospects in the measurement of material properties, information storage, and underwater optical communication.

关键词: blue laser, four-wave mixing, frequency up-conversion

Abstract: We demonstrate the generation of the coherent 420 nm laser via parametric four-wave mixing process in Rb vapor. A single 778 nm laser with circular polarization is directly injected into a high-density atomic vapor, which drives the atoms from the 5S_1/2 state to the 5D_5/2 state with monochromatic two-photon transition. The frequency up-conversion laser is generated by the parametric four-wave mixing process under the phase matching condition. This coherent laser is firstly certified by the knife-edge method and a narrow range grating spectrometer. Then the generated laser power is investigated in terms of the power and frequency of the incoming beam as well as the density of the atoms. Finally, a 420 nm coherent laser with power of 19 μW and beam quality of M_x² =1.32, M_y² =1.37 is obtained with optimal experimental parameters. This novel laser shows potential prospects in the measurement of material properties, information storage, and underwater optical communication.

Key words: blue laser, four-wave mixing, frequency up-conversion

中图分类号: (Photoionization and excitation)

32.80.-t

42.65.-k (Nonlinear optics) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)

刘浩, 元晋鹏, 汪丽蓉, 肖连团, 贾锁堂. Coherent 420 nm laser beam generated by four-wave mixing in Rb vapor with a single continuous-wave laser[J]. 中国物理B, 2020, 29(4): 43203-043203.

Hao Liu(刘浩), Jin-Peng Yuan(元晋鹏), Li-Rong Wang(汪丽蓉), Lian-Tuan Xiao(肖连团), Suo-Tang Jia(贾锁堂). Coherent 420 nm laser beam generated by four-wave mixing in Rb vapor with a single continuous-wave laser[J]. Chin. Phys. B, 2020, 29(4): 43203-043203.

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Coherent 420 nm laser beam generated by four-wave mixing in Rb vapor with a single continuous-wave laser

Coherent 420 nm laser beam generated by four-wave mixing in Rb vapor with a single continuous-wave laser

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