Towards optical frequency comb generation in continuous-wave pumped titanium indiffused lithium niobate waveguide resonators

TL;DR

This paper reports initial experimental observations of optical frequency comb generation in a titanium indiffused lithium niobate waveguide resonator, highlighting the potential and challenges of integrated second-order nonlinear systems.

Contribution

First experimental exploration of integrated lithium niobate waveguide resonators for optical frequency comb generation with comparison to existing theoretical models.

Findings

Observed strong instabilities in the system

Compared experimental results with theoretical predictions

Identified the need for further stability investigations

Abstract

Much progress, both experimentally and theoretically, has recently been made towards optical frequency comb generation from continuously pumped second-order nonlinear systems. Here, we present the first observations towards finding an integrated solution for such a system, using a titanium indiffused lithium niobate waveguide resonator. These results are compared to recently developed theory for equivalent systems. The system is seen to exhibit strong instabilities, which require further investigation in order to fully determine the suitability of this platform for stable optical frequency comb generation.