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Nonsequential modeling of laser diode stacks using Zemax: simulation, optimization, and experimental validation.

Nicola Coluccelli¹

¹Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Dipartimento di Fisica del,Politecnico di Milano, 20133 Milano, Italy. nicola.coluccelli@polimi.it

|August 3, 2010

Summary

This study presents a calibrated Zemax nonsequential ray tracing model for laser diode stacks. The validated model accurately predicts laser beam characteristics, achieving less than 6% error in spot size and waist location predictions.

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Area of Science:

Optics and Photonics
Laser Technology
Computational Modeling

Background:

Accurate modeling of laser diode stacks is crucial for optical system design.
Zemax ray tracing software is a powerful tool for optical simulations.
Nonsequential mode allows for complex optical system analysis.

Purpose of the Study:

To develop and validate a nonsequential Zemax ray tracing model for a real laser diode stack.
To calibrate the model using experimental near-field and far-field measurements.
To assess the model's predictive accuracy for laser beam parameters.

Main Methods:

Implementing a nonsequential ray tracing model in Zemax.
Adjusting geometric and optical parameters for model calibration.
Comparing simulated and experimental intensity irradiance profiles.
Validating the model by analyzing transverse irradiance profiles along a caustic.

Main Results:

Successfully calibrated the Zemax model to match experimental intensity profiles.
Achieved high accuracy in predicting spot sizes and waist location.
Demonstrated a maximum prediction error below 6%.

Conclusions:

The developed Zemax nonsequential model provides a reliable tool for simulating laser diode stacks.
The calibration and validation methodology ensures accurate prediction of laser beam characteristics.
This approach is valuable for optimizing laser-based optical system designs.