Octave mid-infrared optical frequency comb from Er:fiber-laser-pumped aperiodically poled Mg: LiNbO3

• DOI: 10.1364/ol.410958
• Publication Date: 2020-10-29T18:30:39Z
• Authors: Lian Zhou; Yang Liu; Haipeng Lou; Yuanfeng Di; Gehui Xie; Zhiwei Zhu; Zejiang Deng; Daping Luo; Chenglin Gu; Huaixi Chen; Wenxue Li
• Keywords: Poling; Supercontinuum

In this Letter, we report an octave-spanning mid-infrared (MIR) comb generation with a difference frequency (DFG) approach optimized for aperiodically poled Mg:LiNbO3 and nonlinear spectral broadening. An Er:fiber is delivered to two branches amplified in Yb:fiber amplifier, respectively. We demonstrate that the two-branch DFG can yield spectrum tuned over octave fan-out periodically lithium niobate. Thus, obtain poling period profile design Mg:LiNbO3. The results broadband combs be generated MIR atmospheric window.