The Investigation on the Beam Spatial Intensity Distributions in the Injection-Seeded Terahertz Parametric Generator

Jie Zang; Dong Wu; Xingyu Zhang; Zhenhua Cong; Zengguang Qin; Xiaohan Chen; Zhaojun Liu; Ping Li; Feilong Gao; Chenyang Jia; Yue Jiao; Weitao Wang; Shaojun Zhang

doi:10.1109/JPHOT.2019.2904262

IEEE Photonics Journal (Jan 2019)

The Investigation on the Beam Spatial Intensity Distributions in the Injection-Seeded Terahertz Parametric Generator

Jie Zang,
Dong Wu,
Xingyu Zhang,
Zhenhua Cong,
Zengguang Qin,
Xiaohan Chen,
Zhaojun Liu,
Ping Li,
Feilong Gao,
Chenyang Jia,
Yue Jiao,
Weitao Wang,
Shaojun Zhang

Affiliations

Jie Zang: ORCiD; School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Dong Wu: Optoelectronics Research Centre, University of Southampton, Southampton, U.K.
Xingyu Zhang: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Zhenhua Cong: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Zengguang Qin: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Xiaohan Chen: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Zhaojun Liu: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Ping Li: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Feilong Gao: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Chenyang Jia: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Yue Jiao: School of Information Science and Engineering, Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan, China
Weitao Wang: ORCiD; Laser Institute of Shandong Academy of Sciences, Jinan, China
Shaojun Zhang: State Key Laboratory of Crystal Materials, Shandong University, Jinan, China

DOI: https://doi.org/10.1109/JPHOT.2019.2904262
Journal volume & issue: Vol. 11, no. 2
pp. 1 – 11

Abstract

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In terahertz (THz) wave parametric sources, the large angle between the pump and terahertz waves (about 65° in LiNbO3 crystal) will affect the spatial intensity distributions. To investigate how the noncollinear phase-matching affects the spatial intensity properties of the pump, Stokes, and THz waves, we take the injection-seeded THz-wave parametric generator (is-TPG) as an example to study the beam spatial intensity properties via the numerical solutions of the coupled-wave equations. The simulated results demonstrate that the pump and Stokes intensities have significant changes along the THz-wave propagation direction. It is the first time that the spatial intensity distributions of the three waves in the THz-wave parametric sources have been studied in theory. In addition, the output intensity distributions of the pump, Stokes, and THz waves are measured in the designed is-TPG. The measured spatial intensity distributions are in coincidence with the simulated results. Investigations on the beam spatial intensity properties provide a potential approach to improve the THz-wave outputs and the pump conversion efficiency for the is-TPG and other THz-wave parametric sources.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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