Efficient method of designing optically-pumped vertical external cavity surface emitting lasers having equally excited quantum wells

TL;DR

This paper presents a simple, analytical method for designing optically-pumped VECSELs with evenly excited quantum wells, optimizing carrier distribution without complex calculations.

Contribution

It introduces a straightforward model to determine quantum well and blocking layer placement, compensating pump decay in VECSELs, requiring minimal computational effort.

Findings

Model predicts feasibility of uniform excitation for given device length.

Provides explicit layer placement without iterative numerical methods.

Enhances VECSEL design efficiency and simplicity.

Abstract

Even distribution of carriers allows to maximize optical gain of the Optically-Pumped Vertical External Cavity Surface Emitting Laser. In this paper we show how to distribute the quantum wells and blocking layers in order to compensate the exponential decay of the pumping beam intensity. Our model says whether it is possible at all (for an assumed length of the device) and, if it is, allows to find positions of the blocking layers. No iterations nor numerical calculations more sophisticated than a standard calculator can do are required to use the model.