Spectral Singularities, Threshold Gain, and Output Intensity for a Slab Laser with Mirrors

TL;DR

This paper investigates how spectral singularities influence the threshold gain and output intensity in a slab laser with mirrors, revealing their dependence on mirror properties and refractive index.

Contribution

It derives explicit formulas for laser threshold and output intensity considering spectral singularities, linking physical parameters to laser performance.

Findings

Threshold gain depends on mirror position and properties.

Output intensity is influenced by the real part of the refractive index.

Spectral singularities determine laser emission characteristics.

Abstract

We explore the consequences of the emergence of linear and nonlinear spectral singularities in TE modes of a homogeneous slab of active optical material that is placed between two mirrors. We use the results together with two basic postulates regarding the behavior of laser light emission to derive explicit expressions for the laser threshold condition and output intensity for these modes of the slab and discuss their physical implications. In particular, we reveal the details of the dependence of the threshold gain and output intensity on the position and properties of the mirrors and on the real part of the refractive index of the gain material.