70W全光纤超连续谱光源

All-fiber 70W supercontinuum

超连续谱光源在很多领域具有广泛而重要的应用,过去40多年一直是国际研究热点之一。但一方面由于普通双包层光纤与光子晶体光纤模场不匹配会导致较高的熔接损耗和耦合损耗;另一方面受高质量超快光纤脉冲激光器输出平均功率的限制,目前超连续谱光源的最高输出平均功率只有50 W。报道了一种全光纤结构的超连续谱光源,输出平均功率为70 W。由于整个装置采用一种新的超连续谱形成机制,较好解决了普通双包层光纤与光子晶体光纤由于模场不匹配导致的较高熔接损耗和耦合损耗;降低了对脉冲泵浦源光谱质量的要求。

Supercontinuum has a wide and important application in many fields,it is one of the hottest research topics during the past four decade.However,the splicing and coupling loss is a little high owing to the mismatch of mode area between double-clad fiber and photonic crystal fiber and the maximum average output power of the supercontinuum is 50 W due to limited average output power available of ultrafast fiber lasers with high quality.In this paper,a 70 W supercontinuum generation is constructed which not only overcomes the problem of high splicing and coupling loss between fiber and photonic crystal fiber caused by the mismatch of mode area,but also relaxes the spectral requirement for the pumping fiber laser sources.