Comment on: "Mode repulsion and mode coupling in random lasers" by Cao et al. Phys. Rev. B {\bf 67}, 161101 (R) (2003)

TL;DR

This paper critiques a previous study on multi-mode behavior in random lasers, arguing that the original interpretation of observed mode splitting is misleading and offers a different perspective.

Contribution

It provides a critical analysis of the interpretation of experimental results on mode splitting in random lasers, challenging prior conclusions.

Findings

Original interpretation of mode splitting is misleading

Highlights the need for careful analysis of multi-mode behavior

Suggests alternative explanations for observed phenomena

Abstract

In recent paper Cao et al. [Phys. Rev. B {\bf 67}, 161101 (R) (2003)] reported an observation of what is the first genuine multi-mode behavior in random lasers. They observed a splitting of a single lasing line into two lines with close frequencies when pumping is increased beyond a certain threshold. Here we are pointing out that the qualitative interpretation of these experiments given in that paper is misleading.