title: Phase-dependent interference between frequency doubled comb lines in a χ(2)phase-matched aluminum nitride microring.
abstract: Nonlinear optical conversion with frequency combs is important for self-referencing and for generating shorter wavelength combs. Here we demonstrate efficient frequency comb doubling through the combination of second-harmonic generation (SHG) and sum-frequency generation (SFG) of an input comb with a high Q, phase-matched χ(2)microring resonator. Phase coherence of the SHG and SFG nonlinear conversion processes is confirmed by sinusoidal phase-dependent interference between frequency doubled comb lines.
authors: Hojoong
authors: H
authors: Jung
authors: Xiang
authors: X
authors: Guo
authors: Na
authors: N
authors: Zhu
authors: Scott B
authors: SB
authors: Papp
authors: Scott A
authors: SA
authors: Diddams
authors: Hong X
authors: HX
authors: Tang