Decomposed entropy and estimation of output power in deformed microcavity lasers

TL;DR

This paper introduces a new method using decomposed Shannon entropy of joint probability distributions of far-field profiles to estimate the output power in deformed microcavity lasers, enhancing understanding of their directionality.

Contribution

It extends previous work by considering joint probability distributions and decomposed entropy to estimate output power without additional data.

Findings

Decomposed entropy correlates with output power in microcavity lasers.

The method provides a new way to quantify directionality and power output.

It offers a foundation for analyzing laser emission characteristics.

Abstract

Park et al. [Phys. Rev. A 106, L031504 (2022)] showed that the Shannon entropy of the probability distribution of a single random variable for far-field profiles (FFPs) in deformed microcavity lasers can efficiently measure the directionality of deformed microcavity lasers. In this study, we instead consider two random variables of FFPs with joint probability distributions and introduce the decomposed (Shannon) entropy for the peak intensity of directional emissions. This provides a new foundation such that the decomposed entropy can estimate the degree of the output power at given FFPs without any further information.