# Parametric gain and wavelength conversion via third order nonlinear optics a CMOS compatible waveguide

## TL;DR

This paper demonstrates efficient, broadband wavelength conversion and parametric gain in a CMOS-compatible high-index silica waveguide using four-wave mixing, enabling advanced optical signal processing.

## Contribution

It presents the first demonstration of sub-picosecond wavelength conversion with high efficiency and broad bandwidth in a CMOS-compatible waveguide using third-order nonlinear optics.

## Key findings

- Achieved +16.5dB conversion efficiency
- Demonstrated +15dB parametric gain
- Realized broadband operation over 200nm

## Abstract

We demonstrate sub-picosecond wavelength conversion in the C-band via four wave mixing in a 45cm long high index doped silica spiral waveguide. We achieve an on/off conversion efficiency (signal to idler) of +16.5dB as well as a parametric gain of +15dB for a peak pump power of 38W over a wavelength range of 100nm. Furthermore, we demonstrated a minimum gain of +5dB over a wavelength range as large as 200nm.

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Source: https://tomesphere.com/paper/1705.10423