长波
光学
重复(修辞手法)
功率(物理)
物理
材料科学
辐射传输
语言学
量子力学
哲学
作者
Yang Liu,Jimin Zhao,Zhiyi Wei,Franz X. Kärtner,Guoqing Chang
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-01-17
卷期号:48 (4): 1052-1052
被引量:8
摘要
We demonstrate high-power longwave mid-IR ultrafast sources based on a high-power Er-fiber laser system at 1.55 µm with a 32-MHz repetition rate. Compared with previous 1.03-µm-driven difference frequency generation (DFG), our current configuration allows tighter focusing in the GaSe crystal thanks to an increased damage threshold at 1.55 µm. Consequently, the 1.55-µm-driven DFG can operate in the regime of optical parametric amplification (OPA), in which the mid-IR power grows exponentially with respect to the square root of the pumping power. We experimentally demonstrate this operation regime and achieve broadband mid-IR pulses that are tunable in the 7.7-17.3 µm range with a maximum average power of 58.3 mW, which is also confirmed by our numerical simulation.
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