Efficient carrier-envelope phase tunable mid-infrared frequency combs based on CW-seeded optical parametric generation

Mikhail Roiz, Jui-Yu Lai, Juho Karhu, Markku Vainio, C. Sibilia, A. Belardini, G. Pauliat
2021 EPJ Web of Conferences  
We present an efficient method for generating frequency combs in the mid-infrared (MIR) spectral range in bulk lithium niobate crystals as well as in waveguides. Our approach is simple and robust, since it is based on single-pass configuration of femtosecond Optical Parametric Generation (OPG) seeded by a telecom continuous-wave laser. Precise and fast tuning of the seed laser allows to rapidly change the offset frequency of the generated MIR comb independent of its repetition rate. The MIR
more » ... offset frequency is inherently known, so its direct detection is not required. An additional degree of freedom that further complements the versatility of our light source is a unique way of repetition rate or mode spacing adjustments. This is achieved by our new concept of coherent multi-seeding that depending on the configuration allows for pulse train modulation and mode spacing, or repetition rate division by an integer number.
doi:10.1051/epjconf/202125511002 fatcat:7pgwuokprjarrc5t3qjxmeljwa