Widely Tunable High-Repetition-Rate Terahertz Generation Based on an Efficient Doubly Resonant Type-II PPLN OPO

Jialin Mei; Kai Zhong; Maorong Wang; Yang Liu; Degang Xu; Wei Shi; Yuye Wang; Jianquan Yao; Wanguo Liang

doi:10.1109/JPHOT.2016.2633394

IEEE Photonics Journal (Jan 2016)

Widely Tunable High-Repetition-Rate Terahertz Generation Based on an Efficient Doubly Resonant Type-II PPLN OPO

Jialin Mei,
Kai Zhong,
Maorong Wang,
Yang Liu,
Degang Xu,
Wei Shi,
Yuye Wang,
Jianquan Yao,
Wanguo Liang

Affiliations

Jialin Mei: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Kai Zhong: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Maorong Wang: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Yang Liu: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Degang Xu: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Wei Shi: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Yuye Wang: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Jianquan Yao: Institute of Laser and Optoelectronics, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin, China
Wanguo Liang: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China

DOI: https://doi.org/10.1109/JPHOT.2016.2633394
Journal volume & issue: Vol. 8, no. 6
pp. 1 – 7

Abstract

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We demonstrated a compact, widely tunable, and monochromatic high-repetition-rate terahertz (THz) source based on difference frequency generation in a GaSe crystal. The dual-wavelength pump laser was a doubly resonant near-degenerate type-II periodically poled LiNbO3 (PPLN) optical parametric oscillator (OPO), intracavity pumped by a 1.064-μm Q-switched Nd:YVO4 laser operating at 25 kHz. The PPLN OPO covered the wavelength range of 2072-2186 nm through temperature tuning with a 55-mm-long nonlinear crystal, and the maximum output power was 3.27 W. The generated THz wave was continuously tunable from 0.24 (1250 μm) to 3.78 THz (79 μm) with the maximum average output power of 1.8 μW at 1.57 THz. Such a compact and portable THz source has great potential for spectroscopy and imaging applications.

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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