光学
双折射
材料科学
色散(光学)
红外线的
非线性光学
波长
光电子学
自相位调制
偏振模色散
光学材料
物理
激光器
作者
Hongwei Gu,Dazhi Lu,Chen Cui,Fei Liang,Kui Wu,Haohai Yu,Han Zhang
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-09-12
卷期号:49 (19): 5643-5643
摘要
Extending lasing wavelengths to the mid-infrared (MIR) spectrum is vital for both civilian and military applications; however, it remains challenging when employing oxide nonlinear optical crystals. In this study, we report the generation of MIR nanosecond pulses via difference frequency generation (DFG) with a near-IR pump using a newly designed langasite (LGS) crystal, La 3 (Nb 0.6 Ta 0.4 ) 0.5 Ga 5.5 O 14 (LGNT 0.4 ), which incorporates birefringence dispersion management techniques with La 3 Ga 5.5 Nb 0.5 O 14 (LGN) as a template. Due to the improved effective nonlinear coefficients and the maintained IR cutoff relative to LGN, the tunable DFG laser in LGNT 0.4 extended from 4.24 to 6.84 μm, delivering a maximum pulse energy of 16.3 μJ at 5.02 μm. To the best of our knowledge, this is the first known oxide material capable of generating tunable nanosecond pulsed lasers beyond 6 μm at μJ-level energies, demonstrating promising potential for high-intensity MIR laser systems owing to its high laser damage threshold.
科研通智能强力驱动
Strongly Powered by AbleSci AI