Highly coherent phase-lock of an 8.1 $\hat{I}¼$m quantum cascade laser to a turn-key mid-IR frequency comb

B. Chomet, D. Gacemi, O. Lopez +5

A continuous-wave Fabry-Perot quantum cascade laser (QCL) emitting at 8.1 $\hat{I}¼$m operating in the single mode regime has been coherently phase locked to a turn-key low-noise commerc…