Mid-infrared (MIR) laser sources operating in the 2.7–3μm spectral region have attracted extensive attention for many applications due to the unique features of locating at the atmospheric transparency window,corres...Mid-infrared (MIR) laser sources operating in the 2.7–3μm spectral region have attracted extensive attention for many applications due to the unique features of locating at the atmospheric transparency window,corresponding to the"characteristic fingerprint"spectra of several gas molecules,and strong absorption of water.Over the past two decades,significant developments have been achieved in 2.7–3μm MIR lasers benefiting from the sustainable innovations in laser technology and the great progress in material science.Here,we mainly summarize and review the recent progress of MIR bulk laser sources based on the rare-earth ions-doped crystals in the 2.7–3μm spectral region,including Er3+-,Ho3+-,and Dy3+-doped crystalline lasers.The outlooks and challenges for future development of rare-earth-doped MIR bulk lasers are also discussed.展开更多
文摘通过1 064 nm激光泵浦KTP晶体光参量振荡(OPO)技术获得了高峰值功率2.7μm波段激光输出,对实验结果开展了详细的分析。泵浦源为电光调Q Nd:YAG激光器,光参量振荡器谐振腔采用单谐振结构,将两块相同的KTP晶体光轴相向放置以补偿走离效应,KTP晶体按?=0°,θ=62°切割以获得波长2.7μm波段激光输出,采用Ⅱ(B)类相位匹配(o→o+e)以利用较大的非线性系数。在泵浦能量为89 m J,脉宽10 ns的条件下,获得脉冲能量7.5 m J,波长2.67μm,脉宽8.5 ns的激光输出。
基金supported by the National Natural Science Foundation of China (Nos. 61975095, 61975097, and 61308042)the Young Scholars Program of Shandong University (No. 2017WLJH48)+1 种基金the Youth Cross Innovation Group of Shandong University (No. 2020QNQT)the Financial Support from Qilu Young Scholar of Shandong University
文摘Mid-infrared (MIR) laser sources operating in the 2.7–3μm spectral region have attracted extensive attention for many applications due to the unique features of locating at the atmospheric transparency window,corresponding to the"characteristic fingerprint"spectra of several gas molecules,and strong absorption of water.Over the past two decades,significant developments have been achieved in 2.7–3μm MIR lasers benefiting from the sustainable innovations in laser technology and the great progress in material science.Here,we mainly summarize and review the recent progress of MIR bulk laser sources based on the rare-earth ions-doped crystals in the 2.7–3μm spectral region,including Er3+-,Ho3+-,and Dy3+-doped crystalline lasers.The outlooks and challenges for future development of rare-earth-doped MIR bulk lasers are also discussed.
