双后向结构的线宽拓展L波段超荧光光源

报道了采用两级级联双后向抽运的光源结构,实现高效率和线宽拓展的L波段掺铒光纤超荧光光源.通过数值模拟,研究了两级光纤长度分配和抽运功率比例对光源输出特性的影响.模拟表明,该结构可获得线宽拓展的平坦L波段光谱,相比常规L波段光谱线宽拓展了15 nm,达近60 nm.此外,抽运功率比例为1∶1时该结构的抽运转换效率最高.利...

Linewidth Broadening L-band Superfluorescent Fiber Source by Using Dual-backward Pumped Configuration

A linewidth broadening and high efficiency erbium-doped superfluorescent fiber source (SFS) by using the cascaded dual-backward pumped configuration is proposed. The effects of fiber length arrangement and pump power ratio on the output characteristics of the L-band SFS are investigated by simulation. The simulational results show that the linewidth broadening L-band SFS could be achieved by the proposed design.The spectral linewidth is over 15nm broader as compare with the conventional L-band SFS, up to 60nm. Further, the design gives the highest pump efficiency at pump power ratio of 0.5. An L-band SFS of 62mW output power, 30.1% pump efficiency and 56.6nm linewidth is experimentally achieved with 206mW pump power of a 980nm LD.