报道了一种工作波长在L波段的包层泵浦Er³⁺/Yb³⁺共掺光纤环形激光器.环形腔内的激光工作介质为一段9 m长的Er³⁺/Yb³⁺共掺高掺杂光纤.利用6个976 nm LD同时抽运前段Er³⁺/Yb³⁺共掺双包层光纤产生的放大自发辐射谱作二次抽运源,使腔内增义谱由C波段移到L波段,实现了L波段光纤激光器的稳定输出;采用包层泵浦技术,在抽运功率为3594.5 mW时,测得泵浦入纤功率为2731.8 mW,实现了输出连续功率最大518.4 mW,斜率效率达到19% 的激光输出;所形成激光的工作波长为1613.94 nm,激光光谱的3 dB带宽为1.5 nm,边模抑制比接近于50 dB.

A cladding pumped Er/Yb co-doped double clad fiber ring laser operating in L-band is demonstrated. A 9-m-long Er 3+ /Yb 3+ co-doped fiber (EYDF) is used as the gain medium, and six diode lasers are used to cladding pump EYDF, by utilizing amplified spontaneous emission as a secondary pump source, the laser can operate in L-bandstably.Whenthepumpingpoweris3594.5mW,thepumppowerofenteringfiberismeasuredtobe2731.8mW and the maximum output power obtained is 518.4 mW, the slope efficiency is 19%. The laser output wavelength is 1613.94 nm, the 3 dB band width is 0.15 nm, and the side mode suppression ratio is about 50 dB.