… optical applications. The strict phase-matching condition should be satisfied for an efficient
nonlinear optical … Q factors of 5.1 × 10 6 (blue dash curve) and 2.6 × 10 6 (green dash curve) …

… linear optical properties, outstanding electrooptical responses, and strong second-order (χ …
by the giant single photon nonlinearity (∼10 −6 ), an excellent single-mode condition, …

… Before the photon-pair generation, we first measured the optical response of the PPLN-QNWR.
We turn off the pump laser at 780 nm, and we observe the transmission spectra of a …

… This span corresponds to 4/5 of an octave above the noise floor of the optical spectrum
analyzer. A FWHM of 14 THz is extracted by fitting the spectral envelope with a ${\rm sech^2}$ …

… Our technique is applicable to optical harmonic generation, quantum light sources,
frequency conversion, and many other photonic information processes across visible to mid-IR …

… Second-order nonlinearity ( χ ( 2 ) ) is the basis of many important nonlinear optical processes
such as second-harmonic generation (SHG), sum and difference frequency generation, …

… stored in up to 6 frequency bins in an Er-doped optical fiber [35]… of a signal photon resonant
with an optical transition of Pr … beam to two cascaded electro-optical modulators (EOM1;2) …

… The ultra-high Q factors give rise to a rich family of nonlinear optical phenomena from optical
parametric oscillation (OPO) to harmonics generation with unprecedented characteristics …

… applications [1–6]. By encoding quantum information into the optical photons, the quantum
… However, at optical frequencies, the absence of the single-photon nonlinearity hinders the …

… However, the determination of nonlinear optical efficiency in … and all-optical processing in
miniaturized optical devices. Here, we … of various nonlinear optical effects in nanophotonics. …