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Decomposed Entropy and Estimation of Output Power in Deformed Microcavity Lasers
Kyu-Won Park1, Kwon-Wook Son2, Chang-Hyun Ju2
1Research Institute of Mathematics, Seoul National University, Seoul 08826, Republic of Korea.
Entropy (Basel, Switzerland)
|December 23, 2022
Summary
This study introduces decomposed entropy using joint probability distributions of far-field profiles (FFPs) to measure laser directionality. This method estimates output power from FFPs without additional data.
Area of Science:
- Optics and Photonics
- Laser Physics
- Statistical Mechanics
Background:
- Directionality of deformed microcavity lasers is crucial for applications.
- Previous work used single-variable Shannon entropy for laser directionality.
- Far-field profiles (FFPs) characterize laser emission patterns.
Purpose of the Study:
- To introduce a novel method for quantifying laser directionality.
- To develop a new metric based on joint probability distributions of FFPs.
- To establish a foundation for estimating output power from FFPs.
Main Methods:
- Considered two random variables of FFPs with joint probability distributions.
- Introduced decomposed (Shannon) entropy for peak intensities of directional emissions.
- Analyzed the relationship between decomposed entropy and output power.
Main Results:
- Decomposed entropy effectively measures the directionality of deformed microcavity lasers.
- The method provides a way to estimate output power from FFPs.
- This approach requires no further information beyond FFPs.
Conclusions:
- Decomposed entropy offers a robust measure of laser directionality.
- This entropy-based method can predict output power from FFPs.
- The findings advance the understanding and characterization of microcavity lasers.
