The influence of more concentrated energy distribution formed by an aspheric lens with eliminated spherical aberration on laser-induced air breakdown

Abstract

In this work, we study the influence of energy distribution caused by spherical aberration on laser-induced air breakdown. We achieve more concentrated energy distribution using an aspheric lens with eliminated...

Spectral stability improvement through wide fields of view collection optics in laser-induced breakdown spectroscopy applications

“…(ii) Based on bare ber collection, the 7-ber bundle was positioned at various collection distances (10,15,20,25,30,40,50,60,80, and 100 mm) to collect emissions from various sizes of regions with the eld of view linearly varying with distance.…”

“…[1][2][3][4][5] However, the limited measurement repeatability of the system hinders its quantitative analytical performance. Various methods have been developed to improve spectral stability, such as beam shaping, 6 optimization of laser focusing optics, [7][8][9][10] plasma image assistance, 11 algorithm correction, 12,13 etc.…”