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Designing a Broadband Pump for High-Quality Micro-Lasers via Modified Net Radiation Method.

Sergey Nechayev¹, Philip D Reusswig², Marc A Baldo²

¹Department of Mechanical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel.

Scientific Reports

|December 8, 2016

Summary

This summary is machine-generated.

A new theoretical framework models energy transfer in micro-lasers, enabling efficient non-resonant pumping. This research optimizes solar-pumped lasers by understanding absorption dynamics for improved performance.

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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Area of Science:

Optics and Photonics
Materials Science
Energy Science

Background:

High-quality micro-lasers are crucial for various applications but suffer from poor broadband pump light absorption.
Cascade energy transfer has recently enabled non-resonant pumping, improving micro-laser and solar-pumped laser performance.

Purpose of the Study:

To develop a generic theoretical framework for modeling energy transfer in cascade sensitizer-laser gain systems.
To optimize parameters for low-threshold solar-pumped lasers using this new model.

Main Methods:

Developed a theoretical model based on linear equations of the modified net radiation method.
Applied the formalism to compute optimal parameters for low-threshold solar-pumped lasers.
Validated the model by comparing numerical results with experimental data from a sensitized Nd³⁺:YAG cavity.

Main Results:

The model accurately describes absorption, emission, and energy transfer in cascade systems.
Optimal pump absorption for these lasers is below maximal absorption due to interplay between absorption and self-absorption.
Quantitative agreement was found between theoretical predictions and experimental data.

Conclusions:

The developed theoretical framework is robust, fast, and of low complexity.
This work facilitates the optimal design of broadband-pumped high-quality micro-lasers.
Paves the way for more efficient solar-pumped lasers through modular design of gain and sensitizing components.