future events

"Complete energy conversion by autoresonant three-wave mixing in nonuniform media"

TYPESpecial Seminar - Solid State Institute, Technion
Speaker:Dr. Oded Yaakobi
Affiliation:INRS-EMT, Univ. of Quebec, Varennes, Quebec, Canada
Location:Solid State Auditorium(Entrance)
Remark:Host: Distinguished Professor Moti Segev

Three-Wave Mixing (TWM) processes appear in many fields of physics e.g. nonlinear optics, plasma physics, acoustics and hydrodynamics. Recently, a general theory of autoresonant three-wave mixing in a nonuniform medium has been derived analytically and demonstrated numerically [1]. It has been shown that due to the medium nonuniformity, a stable phase-locked evolution is automatically established. For a weak nonuniformity, the conversion efficiency between the interacting waves can reach almost 100% of the pump energy. We have shown that due to mechanisms different from those previously reported, it is possible to establish an autoresonant state in wave-mixing processes, resulting in pump-depletion, also in the absence of self-phase and cross-phase modulation effects. Our work generalizes previous studies about two-wave mixing processes in spatially-varying media [2,3] and TWM in the undepleted pump regime (which is effectively a two-wave mixing process) 4].

One of the potential applications of our theory is the design of highly-efficient  X(2)
Optical Parametric Amplifiers (OPAs) allowing complete pump depletion. This kind of OPAs is expected to have a very large amplification bandwidth with a flat amplification spectral profile, similarly to what have been suggested and demonstrated in the case of four-wave mixing In tapered optical fibers [5].


[1] O. Yaakobi, L. Caspani, M. Clerici, F. Vidal and R. Morandotti, Optics Express 21, 1623
[2] A. Barak, Y. Lamhot, L. Friedland and M. Segev, Phys. Rev. Lett. 103, 123901 (2009).
[3] S. Richard, J. Opt. Soc. Am. B 27, 1504 (2010).
[4] H. Suchowski, D. Oron, A. Arie and Y. Silberberg, Phys. Rev. A 78, 063821 (2008).
[5] O. Yaakobi and L. Friedland, Phys. Rev. A 82, 023820 (2010).