新疆师范大学学报（自然科学版）2024，Vol.43Issue(4)：20-25,6.
超宽调谐(2.6～5μm)中红外皮秒脉冲激光的研究
Study of Ultra-wide Tuning(2.6～5μm)Mid-infrared Picosecond Pulsed Laser
摘要
Abstract
In ultrafast pulsed lasers,ultrawide tuning is usually applied in various fields such as supercontinu-um generation,spectral analysis and modulation.In this paper,a"Z"type optical parametric oscillator based on MgO:PPLN crystals is constructed using picosecond pulsed synchronous pumping technology,and a high power,wavelength ultra-wide tuned(2.6～5μm)picosecond pulsed laser source is generated at mid-infrared wavelengths by the crystals with sector-periodic polarization.The oscillator consists of five mirrors and one crystal,and the selection and precise tuning of these five mirrors are the key factors to improve the output performance of the optical parametric oscillator.An Nd:YVO4 picosecond pulsed laser source with a wavelength of 1.064μm is used,and a MgO:PPLN crystal with a tunable period in the range of 26～32μm is selected.When the maximum pump power is 15W,the maximum output powers of 3.41W,2.78 W and 0.52W are obtained at wavelengths of 2.66μm,3.44μm and 4.99μm,respectively,and the corresponding photon conversion efficiencies are 58%,55%and 15%,respectively.The mid-infrared spectral spectral widths of 2.37nm(2615nm),Δλ=1.87nm(3687nm),and Δλ=1.30nm(4992nm)were measured,and a linear narrowing of the long pulse with wavelength spectral spectral widths was observed in the absence of any narrowing optics.The laser output powers in the 2.6～4.5μm band are all greater than 1W,realizing the continuous output of a high-power,wavelength-ultra-wide,broadly tuned mid-infrared picosecond laser.The narrow spectral width ultra-wide tuned mid-infrared picosecond pulsed laser provides a powerful tool for ultrafast process research and application areas.The optimization of the wavelength tuning range and pulse width can meet the high demands of mid-infrared lasers in different fields,which is essential to advance the research and development in related fields.关键词
中红外激光/同步泵浦光参量振荡器/MgO:PPLN晶体/波长宽调谐/皮秒脉冲Key words
Mid-infrared laser/Synchronously pumped optical parametric oscillators/MgO:PPLN/Wavelength width tuning/Picosecond pulse分类
数理科学引用本文复制引用
买里克古丽·艾合买提,达娜·加山尔,杜力坤·苏来曼,塔西买提·玉苏甫..超宽调谐(2.6～5μm)中红外皮秒脉冲激光的研究[J].新疆师范大学学报（自然科学版）,2024,43(4):20-25,6.基金项目
国家自然科学基金项目(12264049 （）
11664041). （）
