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Single-frequency Yb-doped photonic crystal fiber amplifier with 800 W output power

机译:输出功率为800 W的单频掺Yb光子晶体光纤放大器

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A novel acoustic and gain tailored Yb-doped photonic crystal fiber is used to demonstrate over 800 W single-frequency output power with excellent beam quality at 1064 nm. The large mode area fiber core is composed of 7 individually doped segments arranged to create three distinct acoustic regions and preferential gain overlap with the fundamental optical mode. This design leads to suppression of both stimulated Brillouin scattering and modal instability. To the best of our knowledge, the output power represents the highest power ever reported from a near diffraction-limited single-frequency fiber laser. Furthermore, we show that by using a broadband seed, 1.22 kW of output power is obtained without the onset of the modal instability.
机译:一种新颖的声学和增益量身定制的掺Yb的光子晶体光纤用于展示超过800 W的单频输出功率,并在1064 nm处具有出色的光束质量。大模面积光纤纤芯由7个单独掺杂的段组成,这些段被布置为创建三个不同的声学区域,并且优先增益与基本光学模重叠。这种设计可以抑制受激布里渊散射和模态不稳定性。据我们所知,输出功率代表了近衍射极限单频光纤激光器所报告的最高功率。此外,我们表明,通过使用宽带种子,可以获得1.22 kW的输出功率,而不会出现模态不稳定性。

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