Single-Pass Configuration mW-Class Broadband Mid-Infrared Comb Using a Waveguide-Type PPLN Crystal

We generated a broadband mid-infrared comb of 2.4-4.6 μm with an output of 4.2 mW based on an Er:fiber comb as a fundamental light using a waveguide-type PPLN crystal. This system is robust due to its single-pass configuration.