Transversely Pumped Counterpropagating Optical Parametric Oscillation and Amplification

Spectral phase conjugation by quasi-phase-matched three-wave mixing

“…1. It is similar to surface-emitting second-harmonic generation [15,16], transverse-pumping parametric amplification [17] and transverse-pumping phase conjugation [18]. The difference in our proposed system is that the pump pulse A p (t) is much shorter than the signal pulse A s (t).…”

“…The calculated conversion efficiency is 100%, consistent with the theoretical efficiency from Eq. (17). The signal and idler pulse shapes from the numerical analysis are plotted in Fig.…”

“…3 plots the theoretical conversion efficiency calculated from Eq. (17) and that obtained from numerical analysis against the pump energy. The numerical results agree quite well with the theoretical prediction, although the former is slightly lower, due to slight deviation from the ideal conditions stated in Eq.…”

Spectral phase conjugation via extended phase matching

“…18 It is shown in Section 3, for the first time to the author's knowledge, that this EPM scheme is indeed capable of performing SPC and optical parametric amplification (OPA) more efficiently than previous proposals. The analysis also yields a surprising result, namely, that the parametric gain can be theoretically infinite even for a pump pulse with finite energy, analogous to backward-wave oscillation, where counterpropagating waves are parametrically coupled and can give rise to mirrorless optical parametric oscillation [19][20][21][22][23][24][25] (OPO). The reason for the similarity is that, in the scheme presented here, even though the signal and the idler copropagate with the pump pulse in the laboratory frame, they counterpropagate in the frame of the moving pump pulse because one is faster than the pump and one is slower.…”

Quantum properties of counterpropagating two-photon states generated in a planar waveguide

“…One of the most perspective configurations (suggested and elaborated in [33,34,35,36]) is based upon pumping a planar waveguide by a beam perpendicular to its surface. Signal and idler photons then emerge as counter-propagating guided waves.…”