# All-optical frequency processor for networking applications

## TL;DR

This paper introduces an all-optical frequency processor using electro-optic components for dynamic frequency channel transformations in optical networks, emphasizing its potential for efficient, on-chip, all-optical switching.

## Contribution

It presents a novel all-optical frequency processor design based on electro-optic modulators and pulse shapers, with a comprehensive analysis of its performance and optimization strategies.

## Key findings

- Capable of frequency channel hopping and broadcasting
- Optimized transformation performance using mutual information metrics
- Compatible with on-chip implementation and eliminates optical-electrical conversion

## Abstract

We propose an electro-optic approach for transparent optical networking, in which frequency channels are actively transformed into any desired mapping in a wavelength-multiplexed environment. Based on electro-optic phase modulators and Fourier-transform pulse shapers, our all-optical frequency processor (AFP) is examined numerically for the specific operations of frequency channel hopping and broadcasting, and found capable of implementing these transformations with favorable component requirements. Extending our analysis via a mutual-information--based metric for system optimization, we show how to optimize transformation performance under limited resources in a classical context, contrasting the results with those found using metrics motivated by quantum information, such as fidelity and success probability. Given its compatibility with on-chip implementation, as well as elimination of optical-to-electrical conversion in frequency channel switching, the AFP looks to offer valuable potential in silicon photonic network design.