[16p-311-1~20] 3.6 Ultrashort-pulse and high-intensity lasers

▲ [16p-311-16] Soliton pumping based mid-infrared optical frequency comb

〇LEI JIN¹, Masahito Yamanaka¹, Volker Sonnenschein¹, Hideki Tomita¹, Tetsuo Iguchi¹, Atsushi Sato², Akira Ideno², Toshinari Oh-hara², Norihiko Nishizawa¹ (1.Nagoya Univ., 2.Sekisui Medical)

Keywords:mid-infrared, fiber laser, parametric processes

In our previous work, a wavelength tunable MIR comb driven by high power supercontinuum pulses have been reported. The scheme can generate MIR pulses with high coherence, however, the spectra were so broad that mode-power was not high as expected. In this work, a coherent Raman soliton pulse and Yb-fiber laser output were used as the seed pulses of DFG, and the 4.4-5.2 um wavelength tunable, offset-free, coherent MIR comb was generated. For confirming the coherence, the RF beat signal between the MIR comb and quantum cascade laser (QCL) was observed directly in the MIR region.