Phase-dependent interference between frequency doubled comb lines in a chi(2) phase-matched AlN microring
Hojoong Jung, Xiang Guo, Na Zha, Scott Papp, Scott Diddams, Hong X. Tang
Nonlinear optical conversion with frequency combs is important for self-referencing and for generating shorter wavelength combs. Here we demonstrate high-efficiency 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 chi(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. Details of fabricated device, packaging and characterization are discussed.
Optical frequency combs, nonlinear optics, microresonators, photonic integration
, Guo, X.
, Zha, N.
, Papp, S.
, Diddams, S.
and Tang, H.
Phase-dependent interference between frequency doubled comb lines in a chi(2) phase-matched AlN microring, Optics Express
(Accessed June 1, 2023)