High-Repetition-Rate Terahertz Generation in QPM GaAs With a Compact Efficient 2-μm KTP OPO

Jialin Mei; Kai Zhong; Maorong Wang; Pengxiang Liu; Degang Xu; Yuye Wang; Wei Shi; Jianquan Yao; Robert A Norwood; Nasser N Peyghambarian

doi:10.1109/LPT.2016.2557583

High-Repetition-Rate Terahertz Generation in QPM GaAs With a Compact Efficient 2-μm KTP OPO

Jialin Mei, Kai Zhong, Maorong Wang, Pengxiang Liu, Degang Xu, Yuye Wang, Wei Shi, Jianquan Yao, Robert A Norwood, Nasser N Peyghambarian

Optical Sciences, College of

Research output: Contribution to journal › Article

11 Scopus citations

Abstract

An efficient tunable high-repetition-rate KTiOPO₄ (KTP) optical parametric oscillator (OPO) was deployed as a compact terahertz (THz) source for the first time. The KTP OPO was intracavity pumped by an acousto-optical Q-switched Nd:YVO₄ laser and emitted two tunable wavelengths near degeneracy. The OPO tuning range extended continuously from 2.068 to 2.191 μm with a maximum output power of 3.29 W at 24 kHz, corresponding to an optical-optical conversion efficiency of 20.69%, believed to be among the highest reported. A periodically inverted quasi-phase-matched GaAs crystal was used to generate the THz wave by the difference frequency generation (DFG) method based on a dual-wavelength laser. The maximum output THz power was 0.6 μW at 1.244 THz, and the DFG energy conversion efficiency was 4.32 × 10^-7. This provides a potential practical palm-top tunable THz sources for portable applications.

Original language	English (US)
Article number	7457629
Pages (from-to)	1501-1504
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	28
Issue number	14
DOIs	https://doi.org/10.1109/LPT.2016.2557583
State	Published - Jul 15 2016

Keywords

difference frequency generation (DFG)
gallium arsenide (GaAs)
gallium arsenide (GaAs)
optical parametric oscillator (OPO)
quasi-phase-matching (QPM)
terahertz (THz)

ASJC Scopus subject areas

Electrical and Electronic Engineering
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials

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Mei, J., Zhong, K., Wang, M., Liu, P., Xu, D., Wang, Y., Shi, W., Yao, J., Norwood, R. A., & Peyghambarian, N. N. (2016). High-Repetition-Rate Terahertz Generation in QPM GaAs With a Compact Efficient 2-μm KTP OPO. IEEE Photonics Technology Letters, 28(14), 1501-1504. [7457629]. https://doi.org/10.1109/LPT.2016.2557583

High-Repetition-Rate Terahertz Generation in QPM GaAs With a Compact Efficient 2-μm KTP OPO. / Mei, Jialin; Zhong, Kai; Wang, Maorong; Liu, Pengxiang; Xu, Degang; Wang, Yuye; Shi, Wei; Yao, Jianquan; Norwood, Robert A ; Peyghambarian, Nasser N.

In: IEEE Photonics Technology Letters, Vol. 28, No. 14, 7457629, 15.07.2016, p. 1501-1504.

Research output: Contribution to journal › Article

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abstract = "An efficient tunable high-repetition-rate KTiOPO4 (KTP) optical parametric oscillator (OPO) was deployed as a compact terahertz (THz) source for the first time. The KTP OPO was intracavity pumped by an acousto-optical Q-switched Nd:YVO4 laser and emitted two tunable wavelengths near degeneracy. The OPO tuning range extended continuously from 2.068 to 2.191 μm with a maximum output power of 3.29 W at 24 kHz, corresponding to an optical-optical conversion efficiency of 20.69%, believed to be among the highest reported. A periodically inverted quasi-phase-matched GaAs crystal was used to generate the THz wave by the difference frequency generation (DFG) method based on a dual-wavelength laser. The maximum output THz power was 0.6 μW at 1.244 THz, and the DFG energy conversion efficiency was 4.32 × 10-7. This provides a potential practical palm-top tunable THz sources for portable applications.",

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