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首页> 外文期刊>Laser physics letters >High-power wavelength-tunable photonic-crystal-fiber-based oscillator-amplifier-frequency-shifter femtosecond laser system and its applications for material microprocessing
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High-power wavelength-tunable photonic-crystal-fiber-based oscillator-amplifier-frequency-shifter femtosecond laser system and its applications for material microprocessing

机译：基于大功率波长可调谐光子晶体光纤的振荡器-放大器-移频器飞秒激光系统及其在材料微处理中的应用

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摘要

A high-power wavelength-tunable femtosecond fiber laser source is developed based on photonic-crystal fiber technology. Laser oscillator and amplifier stages in this system employ diode-pumped ytterbium-doped single-polarization large-mode-area photonic-crystal fibers in a stretcher-free configuration, delivering laser pulses with an average power of 10.4 W, a pulse width of 52 fs, and a peak power of 4 MW at a repetition rate of 50 MHz after pulse compression. Nonlinear transformation of such laser pulses in a highly nonlinear photonic-crystal fiber yields light pulses smoothly tunable within the range of wavelengths from 1.0 to 1.4 μm and allows the generation of super-continuum stretching from 450 to at least 1750 nm. We report experiments on silicon microprocessing and chromium nanofilm patterning at a high repetition rate, demonstrating the potential of the developed fiber-laser source for fast micromachining, microfabrication, and microprocessing.
机译：基于光子晶体光纤技术的高功率波长可调飞秒光纤激光源的研制。该系统中的激光振荡器和放大器级采用无担架配置的二极管泵浦掺单偏振大偏振区光子晶体光纤，可提供平均功率为10.4 W，脉冲宽度为52的激光脉冲fs，脉冲压缩后的重复频率为50 MHz时的峰值功率为4 MW。在高度非线性的光子晶体光纤中对此类激光脉冲进行非线性转换，可在1.0至1.4μm的波长范围内平稳地调谐光脉冲，并产生从450到至少1750 nm的超连续谱。我们报告了以高重复率进行的硅微处理和铬纳米膜图案化的实验，表明了开发的光纤激光源在快速微加工，微制造和微处理中的潜力。

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