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近年来,高功率光纤激光器发展迅速。1μm波段对应的掺镱光纤激光器,近衍射极限输出功率可达20kW,多横模输出功率可达100kW。此外,2μm波段的掺铥光纤激光器和1.5μm波段的掺铒光纤激光器输出功率分别达到了1kW和0.3kW量级。尽管如此,这些光纤激光器的输出波长,因稀土离子能级跃迁的限制,仅能覆盖有限的光谱范围。基于光纤中受激拉曼散射效应的拉曼光纤激光器是拓展光纤激光器波长范围的有效手段,目前报导的最高功率为数百瓦量级。
In recent years, high-power fiber lasers have developed rapidly. Yb-doped fiber lasers corresponding to 1μm wavelength band have nearly diffraction-limited output power of up to 20kW and multi-transverse mode output power of up to 100kW. In addition, the output powers of the 2μm-band doped 铥 fiber laser and the 1.5μm-band erbium-doped fiber laser reach 1kW and 0.3kW, respectively. However, the output wavelength of these fiber lasers can only cover a limited spectral range due to the rare earth ion level transitions. Raman fiber lasers based on stimulated Raman scattering in fiber are effective means to extend the wavelength range of fiber lasers. The highest power reported currently is in the order of hundreds of watts.