Frequency combs from crystalline resonators: influence of cavity parameters on comb dynamics

TL;DR

This paper investigates how cavity parameters like dispersion, mode crossing, and pump power affect the generation and efficiency of frequency combs in crystalline whispering gallery mode resonators.

Contribution

It provides experimental insights into the influence of cavity dispersion, mode crossing, and Raman gain on comb dynamics in crystalline resonators.

Findings

Dispersion significantly affects comb span and generation.

Mode crossing impacts comb efficiency.

Raman gain and cavity diameter influence comb dynamics.

Abstract

We experimentally study the factors that influence the span in frequency combs derived from the crystalline whispering gallery mode resonators. We observe that cavity dispersion plays an important role in generation of combs by cascaded four wave mixing process. We observed combs from the resonators with anomalous dispersion and nearly zero dispersion at the pump wavelength. In addition, the comb generation efficiency is found to be affected by the crossing of modes of different families. The influence of Raman gain is discussed as well as the role of cavity diameter and pump power. Copyright 2014 California Institute of Technology. Government sponsorship acknowledged.