Author Affiliations
Abstract
1 Laboratory of Infrared Material and Devices, Research Institute of Advanced Technologies, Ningbo University, Ningbo315211, China
2 Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo315211, China
3 Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo315211, China
We report on the investigation of intermode beating mode-locked (IBML) pulse generation in a simple all-fiber Tm$^{3+}$-doped double clad fiber laser (TDFL). This IBML TDFL is implemented by matching longitudinal-mode frequency between 793 nm laser and TDFL without extra mode locker. The central wavelength of ${\sim}1983~\text{nm}$, the fundamental pulse frequency of ${\sim}9.6~\text{MHz}$ and the signal-to-noise ratio (SNR) of ${>}50~\text{dB}$ are achieved in this IBML TDFL. With laser cavity optimization, the IBML TDFL can finally generate an average output power of 1.03 W with corresponding pulse energy of ${\sim}107~\text{nJ}$. These results can provide an easily accessible way to develop compact large-energy, high-power TDFLs.
average output power intermode beating mode-locking Tm3+ -doped double clad fiber laser pulse energy High Power Laser Science and Engineering
2019, 7(4): 04000e65
对于远红外自由电子激光使用的大尺度(10m量级)准同心光腔,由于短脉冲效应严重影响功率演化,光束团的数值模拟必须同时考察时域-空域中的演化,因此计算量是巨大的.为了缩小计算量但又不失精确度,发展了一种称为"惠更斯变换"的公式,它以简单的类似基尔霍夫-费涅尔公式的积分运算精确地重现了波荡器之外的光束团演化.
惠更斯变换 短脉冲数值模拟 大尺度准同心腔 高平均功率自由电子激光 Heggens transform short-pulse effects numerical s high average output power FE
脉冲运转的“之”字形Nd:YAG板状激光器,在工作频率为50pps时,最高输出激光平均功率达230W。由于采用了“之”字形光路,使热畸变得到补偿,输出激光束的发散角得到改善,一般为3×4mrad。
板状激光器 高平均输出功率
