光学
光纤激光器
材料科学
光纤
极化(电化学)
保偏光纤
激光器
光纤传感器
光电子学
物理
化学
物理化学
作者
Nan Zhang,Zhaoheng Liang,Wenlong Wang,Junpeng Wen,Y. Q. Liu,Xiaoming Wei,Zhongmin Yang
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-10-30
卷期号:49 (23): 6709-6709
摘要
We demonstrate a high-power 925-nm pulsed laser system based on a frequency-doubled, all-polarization-maintaining (PM) fiber laser source operating at 1.8 µm. The seed is a figure-9 mode-locked oscillator, which incorporates a nonlinear amplifying loop mirror. After power scaling and pulse compression, the 1.8-µm laser source can provide femtosecond pulses with a repetition rate of 31.3 MHz and an output power of 2.24 W. Through frequency doubling in a nonlinear crystal, the 925-nm laser delivers a pulse duration of 503 fs and an output power of 818 mW, which is the highest power provided by all-PM fiber laser systems at this wavelength, as far as we know. Furthermore, this 925-nm all-PM fiber laser is employed as the excitation light source for two-photon microscopy (TPM) and second-harmonic generation (SHG) microscopy.
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