Optimal Design of High Energy Similariton Thulium-Doped Fiber Lasers

2019 IEEE 4th Optoelectronics Global Conference (OGC) Pub Date : 2019-09-01 DOI:10.1109/OGC.2019.8925041

Lisha Liu, Xingliang Li, Shumin Zhang, Jingmin Liu, Liangliang Chen, Chaoran Wang, Yaxing Xin, Zihao Guo, Zhenjun Yang

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Abstract

High-energy ultra-fast pulse light source has been widely used in laser medical, environmental monitoring, optical communication, photon spectroscopy and other fields. Compared with conventional soliton fiber lasers, self-similar pulsed fiber lasers can produce higher energy optical pulses without optical wave splitting. In this paper, we have optimized design on dispersion-managed high energy self-similar pulse in thulium doped fiber laser by using numerical simulation method. It is found that, when fixing the filter bandwidth, with the increase of the cavity length and the pump power, the output power will increase. At the same time, Further more, with the shorter cavity length and lower pump power, to obtain a high energy self-similar pulse, a filter with broader bandwidth must be used. By optimizing cavity parameters, and choose the cavity length to be 362 cm, corresponding dispersion value of 0.2224 (ps2), filter bandwidth to be 32 nm, the small signal gain g0 to be 51 dB, pulses with pulse energy up to 32.75 nJ, dechirp pulse width of 142.64 fs have been obtained.

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高能相似掺铥光纤激光器的优化设计

高能超快脉冲光源已广泛应用于激光医疗、环境监测、光通信、光子光谱等领域。与传统的孤子光纤激光器相比，自相似脉冲光纤激光器可以产生更高能量的光脉冲而不产生光波分裂。本文采用数值模拟的方法对掺铥光纤激光器中色散管理的高能自相似脉冲进行了优化设计。研究发现，在固定滤波器带宽时，随着腔长和泵浦功率的增加，输出功率增大。此外，由于腔长较短，泵浦功率较低，要获得高能自相似脉冲，必须使用带宽较宽的滤波器。通过优化空腔参数，选择空腔长度为362 cm，相应色散值为0.2224 (ps2)，滤波器带宽为32 nm，小信号增益为51 dB，获得脉冲能量高达32.75 nJ，解码脉宽为142.64 fs的脉冲。

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2019 IEEE 4th Optoelectronics Global Conference (OGC)

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