Experimental evidence and theoretical modeling of two-photon absorption dynamics in the reduction of intensity noise of solid-state Er:Yb lasers

TL;DR

This paper combines experimental and theoretical approaches to understand how two-photon absorption reduces intensity noise in Er:Yb:Glass lasers, highlighting the importance of the two-photon response time.

Contribution

It introduces a new rate equation model for two-photon absorption losses that accurately predicts experimental noise reduction behavior.

Findings

Two-photon absorption significantly reduces laser intensity noise.

The response time of two-photon absorption influences noise spectrum behavior.

The developed model successfully predicts experimental observations.

Abstract

A theoretical and experimental investigation of the intensity noise reduction induced by two-photon absorption in a Er,Yb:Glass laser is reported. The time response of the two-photon absorption mechanism is shown to play an important role on the behavior of the intensity noise spectrum of the laser. A model including an additional rate equation for the two-photon-absorption losses is developed and allows the experimental observations to be predicted.