An 80 W 350–2400 nm monolithic supercontinuum (SC) source is reported. The high-power SC is generated in a uniform multi-core photonic crystal fiber (PCF) pumped by a 1016 nm pulsed fiber laser. The specially designed PCF has seven 4.5 μm diameter cores, a 0.85 air-filling fraction, and a zero dispersion wavelength (ZDW) of 991 nm. The 1016 nm pulsed laser delivers up to 114 W average power, which is believed to be the highest currently reported for picosecond fiber lasers working below 1020 nm. In order to ensure a robust and compact all-fiber structure, the pump laser is fusion spliced to the PCF using a selective air-hole collapse technique, achieving an ultra-low splicing loss of 0.2 dB despite the severe mode field mismatch. The proximity of the pump wavelength to the ZDW of PCF leads to enhanced visible generation. The output SC has a high spectral density of up to 108 mW/nm (at 580 nm) and over 50 mW/nm across the entire visible waveband. The achieved short-wavelength edge and high-spectral-power density in the visible region, to the best of our knowledge, are the best results reported for high-power visible SC sources.

中文翻译：

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在1016 nm泵浦的七芯光子晶体光纤中产生大功率可见光增强全光纤超连续谱

据报道，一个80 W 350-2400 nm的单片超连续谱（SC）源。高功率SC在由1016 nm脉冲光纤激光器泵浦的均匀多芯光子晶体光纤（PCF）中产生。经过特殊设计的PCF具有七个4.5μm直径的芯，0.85的空气填充分数和991 nm的零色散波长（ZDW）。1016 nm脉冲激光器可提供高达114 W的平均功率，据信这是目前工作于1020 nm以下的皮秒光纤激光器的最高功率。为了确保坚固且紧凑的全光纤结构，泵浦激光器使用选择性气孔塌陷技术熔接至PCF，尽管存在严重的模场失配，但仍实现了0.2 dB的超低熔接损耗。泵浦波长与PCF的ZDW接近可以增强可见光的产生。输出SC具有高达108 mW / nm（在580 nm）的高光谱密度，在整个可见波段上具有50 mW / nm以上的光谱密度。据我们所知，在可见光区域实现的短波长边缘和高光谱功率密度是高功率可见光SC光源报告的最佳结果。