# Intracavity Brillouin gain characterization based on cavity ringdown spectroscopy

## TL;DR

This paper introduces a cavity ringdown spectroscopy technique to directly measure the Brillouin gain coefficient within a laser cavity, allowing comprehensive characterization of material gain, cavity parameters, and lasing properties in a single experiment.

## Contribution

The novel method enables direct intracavity Brillouin gain measurement using cavity ringdown spectroscopy, simplifying characterization processes.

## Key findings

- Accurate measurement of Brillouin gain coefficient intracavity.
- Simultaneous extraction of material gain and cavity parameters.
- Single-experiment approach for comprehensive laser characterization.

## Abstract

We report a technique based upon the cavity ringdown method that enables to characterize the Brillouin gain coefficient directly in a laser cavity. Material gain, optical cavity parameters and lasing properties can be extracted from measurements whithin a single experiment.