Publications by authors named "Teboho Bell"
The effect of aberrations on the beam quality factor (M) of Hermite-Gauss (HG) beams is examined. Using the method of moments, we derive closed-form analytical expressions of M due to astigmatism and spherical aberration. Our analysis reveals that the radius of the HG beams plays a significant role in determining the effect of the aberrations on M.
View Article and Find Full Text PDFArticle Synopsis
- The study examines how optical aberrations affect the beam quality of Laguerre-Gaussian beams, focusing on astigmatism and spherical aberration.
- It presents analytical formulas to determine how these aberrations influence beam quality and highlights the beam width as a crucial factor in this relationship.
- Numerical simulations validate the derived expressions, confirming a strong match between analytical predictions and simulation results.
In this article, we demonstrate selective excitation of second harmonic higher-order modes inside a diode end-pumped solid-state laser resonator that comprises of a nonlinear potassium titanyl phosphate (KTP) crystal and a digitally addressed holographic end-mirror in a form of a reflective phase-only spatial light modulator (SLM). The emitted second harmonic higher-order modes at 532 nm are generated by an intracavity nonlinear KTP crystal that is pumped by high-order fundamental modes operating at 1064 nm. The fundamental modes are digitally controlled by displaying a computer-generated hologram in the form of a grey-scale image to the SLM screen for on-demand high-order modes.
View Article and Find Full Text PDF