Study on terahertz parametric oscillator pumped by multi-transverse-mode lasers

Author

Jiaqi Li ; Yuye Wang ; Degang Xu ; Chao Yan ; Zhongxiao Li ; Pengxiang Liu ; Wei Shi ; Jianquan Yao

Author_Institution

Inst. of Laser & Optoelectron., Tianjin Univ., Tianjin, China

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

The influence of pumping mode on the output characteristic of terahertz parametric oscillators (TPO) is studied theoretically and experimentally. A multi-transverse mode laser was used as the pump source. With the improvement of the transverse mode of the pump beam, a significant increasing of THz output power was observed. The THz output energy decreased from 172nJ to 17nJ when M² value of pump beam degraded from 4.21 to 11.1, under the same pumping energy of 120mJ/pulse. The gain enhancement effect under multimode pumping in the TPO is analyzed theoretically, which can illustrate the variation in THz output power under different pumping modes.

Keywords

laser modes; microwave photonics; optical parametric oscillators; optical pumping; THz output energy; THz output power; energy 120 mJ; gain enhancement effect; multimode pumping; multitransverse mode laser; output characteristics; pump beam; pump source; pumping energy; pumping mode; terahertz parametric oscillators; Laser beams; Laser excitation; Laser modes; Measurement by laser beam; Power generation; Pump lasers; Surface emitting lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956362

Filename

6956362