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The investigation on the beam spatial intensity distributions in the injection-seeded terahertz parametric generator

The investigation on the beam spatial intensity distributions in the injection-seeded terahertz parametric generator
The investigation on the beam spatial intensity distributions in the injection-seeded terahertz parametric generator

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.

LiNbO, nonlinear optics, stimulated polariton scattering, Terahertz radiation
1943-0655
Zang, Jie
a3e54d9d-eae9-4ba4-a047-df96dfd75bdb
Wu, Dong
809e6c6a-71ea-4ffc-abb5-ae2eea7def14
Zhang, Xingyu
c1f4ba46-1b4d-4201-acdf-40f8f25a2147
Cong, Zhenhua
bf44cbac-c0f7-478d-8452-2bb56712e2b8
Qin, Zengguang
16397382-c69a-49c7-95dc-f7933cbb8a50
Chen, Xiaohan
d9dc42b1-6610-45b6-9ae5-11021cf82654
Liu, Zhaojun
7ee37555-b328-4dc1-86c0-ef3b3e11c072
Li, Ping
864f71af-7d0b-40f5-ba22-ec6bac188a81
Gao, Feilong
f8ec254e-3d71-4e63-a0b5-6633df300d60
Jia, Chenyang
7ec2bb8c-37fc-4955-bde4-fcbee3f26122
Jiao, Yue
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Wang, Weitao
44035468-aad7-4a2f-8159-364b4601e9e0
Zhang, Shaojun
c1f26dd4-3981-4202-a9f9-06ae45b07207
Zang, Jie
a3e54d9d-eae9-4ba4-a047-df96dfd75bdb
Wu, Dong
809e6c6a-71ea-4ffc-abb5-ae2eea7def14
Zhang, Xingyu
c1f4ba46-1b4d-4201-acdf-40f8f25a2147
Cong, Zhenhua
bf44cbac-c0f7-478d-8452-2bb56712e2b8
Qin, Zengguang
16397382-c69a-49c7-95dc-f7933cbb8a50
Chen, Xiaohan
d9dc42b1-6610-45b6-9ae5-11021cf82654
Liu, Zhaojun
7ee37555-b328-4dc1-86c0-ef3b3e11c072
Li, Ping
864f71af-7d0b-40f5-ba22-ec6bac188a81
Gao, Feilong
f8ec254e-3d71-4e63-a0b5-6633df300d60
Jia, Chenyang
7ec2bb8c-37fc-4955-bde4-fcbee3f26122
Jiao, Yue
994cf874-1f38-4823-91f8-3519356996a4
Wang, Weitao
44035468-aad7-4a2f-8159-364b4601e9e0
Zhang, Shaojun
c1f26dd4-3981-4202-a9f9-06ae45b07207

Zang, Jie, Wu, Dong, Zhang, Xingyu, Cong, Zhenhua, Qin, Zengguang, Chen, Xiaohan, Liu, Zhaojun, Li, Ping, Gao, Feilong, Jia, Chenyang, Jiao, Yue, Wang, Weitao and Zhang, Shaojun (2019) The investigation on the beam spatial intensity distributions in the injection-seeded terahertz parametric generator. IEEE Photonics Journal, 11 (2). (doi:10.1109/JPHOT.2019.2904262).

Record type: Article

Abstract

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.

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Published date: 1 April 2019
Keywords: LiNbO, nonlinear optics, stimulated polariton scattering, Terahertz radiation

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Local EPrints ID: 431515
URI: https://eprints.soton.ac.uk/id/eprint/431515
ISSN: 1943-0655
PURE UUID: 1c26fd39-617b-444e-b40a-40ea10b64370

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Date deposited: 06 Jun 2019 16:30
Last modified: 09 Dec 2019 17:37

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Contributors

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

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