title: Spectral linewidth preservation in parametric frequency combs seeded by dual pumps.
abstract: We demonstrate new technique for generation of programmable-pitch, wideband frequency combs with low phase noise. The comb generation was achieved using cavity-less, multistage mixer driven by two tunable continuous-wave pump seeds. The approach relies on phase-correlated continuous-wave pumps in order to cancel spectral linewidth broadening inherent to parametric comb generation. Parametric combs with over 200-nm bandwidth were obtained and characterized with respect to phase noise scaling to demonstrate linewidth preservation over 100 generated tones.
authors.affiliation: Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA. ztong@eng.ucsd.edu
authors.forename: Zhi
authors.initials: Z
authors.lastname: Tong
authors.forename: Andreas O J
authors.initials: AO
authors.lastname: Wiberg
authors.forename: Evgeny
authors.initials: E
authors.lastname: Myslivets
authors.forename: Bill P P
authors.initials: BP
authors.lastname: Kuo
authors.forename: Nikola
authors.initials: N
authors.lastname: Alic
authors.forename: Stojan
authors.initials: S
authors.lastname: Radic