Abstract
Discrete-time signal processing (DSP) tools have been used to analyze numerous optical filter configurations in order to optimize their linear response. In this paper, we propose a DSP approach to design nonlinear optical devices by treating the desired nonlinear response in the weak perturbation limit as a discrete-time filter. Optimized discrete-time filters can be designed and then mapped onto a specific optical architecture to obtain the desired nonlinear response. This approach is systematic and intuitive for the design of nonlinear optical devices. We demonstrate this approach by designing autoregressive (AR) and autoregressive moving average (ARMA) lattice filters to obtain a nonlinear phase shift response.
Highlights
In order to satisfy the ever-increasing demand for high bit rates, generation optical communication networks can be made all-optical to overcome the electronic bottleneck and more efficiently utilize the intrinsic broad bandwidth of optical fibers
We design nonlinear optical devices that exhibit enhanced nonlinear phase shift response using microring resonators constructed from nonresonant nonlinear material
This paper shows that the Discrete-time signal processing (DSP) approach is a systematic and intuitive way to design nonlinear optical devices
Summary
In order to satisfy the ever-increasing demand for high bit rates, generation optical communication networks can be made all-optical to overcome the electronic bottleneck and more efficiently utilize the intrinsic broad bandwidth of optical fibers. Artificial resonances can be used in optical architectures to overcome the limitations of current nonlinear devices and materials [1]. We design nonlinear optical devices that exhibit enhanced nonlinear phase shift response using microring resonators constructed from nonresonant nonlinear material. A prototype linear frequency response (in the weak perturbation limit) is selected for the desired nonlinear optical device. An optimized discrete filter is designed to give the same frequency response as the prototype response desired from the optical architecture in the weak perturbation limit.
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