High Average Power Diode-Side-Pumped Intracavity Terahertz Parametric Source Based on Stimulated Polariton Scattering in RbTiOPO<sub>4</sub> Crystal

Feilong Gao; Xingyu Zhang; Zhenhua Cong; Zhaojun Liu; Xiaohan Chen; Zengguang Qin; Peng Wang; Jinjin Xu; Weitao Wang; Shaojun Zhang

doi:10.1109/JPHOT.2020.2981527

IEEE Photonics Journal (Jan 2020)

High Average Power Diode-Side-Pumped Intracavity Terahertz Parametric Source Based on Stimulated Polariton Scattering in RbTiOPO<sub>4</sub> Crystal

Feilong Gao,
Xingyu Zhang,
Zhenhua Cong,
Zhaojun Liu,
Xiaohan Chen,
Zengguang Qin,
Peng Wang,
Jinjin Xu,
Weitao Wang,
Shaojun Zhang

Affiliations

Feilong Gao: ORCiD; Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, China
Xingyu Zhang: ORCiD; Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, China
Zhenhua Cong: ORCiD; Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, China
Zhaojun Liu: ORCiD; Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, China
Xiaohan Chen: Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, China
Zengguang Qin: ORCiD; Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, China
Peng Wang: Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, China
Jinjin Xu: Shandong Provincial Key Laboratory of Laser Technology and Application, School of Information Science and Engineering, Shandong University, Qingdao, 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.2020.2981527
Journal volume & issue: Vol. 12, no. 2
pp. 1 – 9

Abstract

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This paper reports an intracavity terahertz parametric source based on the stimulated polariton scattering in RbTiOPO4 crystal with a high repetition rate and a high average power. The side pumping for the gain medium by laser diodes is adopted to get a higher fundamental power and a larger fundamental laser beam size than those in the diode-end-pumping in order to improve the THz output power. A non-collinear convex-plane fundamental cavity is adopted so that the thermal effect can be offset in some degree and the fundamental beam size is further increased. The obtained maximum average THz output power is 367 μW at 3.88 THz when the diode pump power is 105 W and the pulse repetition frequency (PRF) is 7 kHz. The terahertz power of 367 μW is the highest ever obtained in SPS 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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