@article{discovery1443006,
           month = {July},
          volume = {39},
            note = {This version is the author-accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.},
           pages = {4017 -- 4020},
         journal = {Optics Letters},
          number = {13},
            year = {2014},
           title = {Wavelength conversion and parametric amplification of optical pulses via quasi-phase-matched four-wave mixing in long-period Bragg silicon waveguides},
            issn = {0146-9592},
        keywords = {Wavelength conversion devices; Nonlinear optical devices; 
Waveguides, channeled;  Nonlinear optics, four-wave mixing; (190.4975) Parametric processes; Nonlinear optics, integrated optics.},
          author = {Lavdas, S and Zhao, S and Panoiu, NC and Driscoll, JB and Grote, RR and Osgood, RM},
        abstract = {We present a theoretical analysis supported by comprehensive numerical simulations of quasi-phase-matched fourwave mixing (FWM) of ultrashort optical pulses that propagate in weakly width-modulated silicon photonic nanowire gratings. Our study reveals that, by properly designing the optical waveguide such that the interacting pulses copropagate with the same group velocity, a conversion efficiency enhancement of more than 15 dB, as compared to a uniform waveguide, can readily be achieved. We also analyze the dependence of the conversion efficiency and FWM gain on the pulse width, time delay, walk-off parameter, and grating modulation depth. {\copyright} 2014 Optical Society of America.},
             url = {https://doi.org/10.1364/OL.39.004017}
}