Title :
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
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;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956362
