Quantum effects of intensity interference during parametric amplification

Xue-xiang Xu, Hong‐Chun Yuan

Éric Lantz, F. Devaux, Jean-Luc Blanchet

Cong-Hua Yan, W. Z. Jia, Xin-Hong Jia +3 more

Dissipations in the waveguide-cavity systems destroy quantum interference between the incident signal photons and the cavity photons linearly and, thus, usually limit the manipulation of the photon transport. Here, we adopt a four-mode microring cavity including both second-order (${\ensuremath{\chi}}^{(2)}$) and third-order (${\ensuremath{\chi}}^{(3)}$) nonlinearities side coupled to two different waveguides to manipulate photon transport against dissipative effects. The results show that the incident signal photons can be amplified due to the optical parametric amplification (OPA) originated from ${\ensuremath{\chi}}^{(3)}$ nonlinearities. Owing to the coherent interference between cavity photons with different frequencies, the transmission spectra of the signal field are split into two amplified peaks. The transmission intensities are not always linearly reduced by increasing the dissipations but determined by the competition between the OPA and the dissipations. It means that we can utilize the OPA process to overcome the dissipative effects to manipulate photon transport and, thus, control the transmission intensities of the incident signal photon from ${T}_{c}=0$ to ${T}_{c}>100%$. This competition can also be used to convert the signal field to the idler field with amplified efficiencies.

Izo I. Abram, Juan Ariel Levenson

M. Sebawe Abdalla, Jan Peřina, J. Křepelka

Thomas Symul, Kamel Bencheikh, Juan Ariel Levenson +2 more

We propose and demonstrate a nonlinear parametric amplification system that relies on sequential use of a nonlinear phase shift (Kerr-like effect) and on phase-sensitive parametric amplification. We demonstrate amplification that is 50% better than with a bare phase-sensitive amplifier as well as two additional effects: inversion of weak optical modulation and suppression of classical noise.