Single-frequencyQ-switched neodymium laser

Abstract

A mismatch of the radii of curvature of the mirrors in the arms of an interferometric gravitational-wave detector can be partly compensated by creating a thermal gradient inside the mirror. This paper shows how the interference quality at the output of the German/British GEO 600 gravitationalwave detector could be improved with a simple ring heater.

Generation of high-order Hermite–Gaussian modes in a flashlamp-pumped neodymium phosphate glass laser and their conversion to Laguerre–Gaussian modes

“…We used in experiments a plane ë spherical resonator of length L 50 cm with the radius of curvature of a highly [11] with the maximum of the reêection coefécient $ 45 % was used as the output plane mirror. The active elements (AEs) of the laser were made of a GLS-23 neodymium phosphate glass, they had plane ë parallel ends tilted at an angle of 858 to the resonator axis and were 5 Â 100 or 7 Â 130 mm in size (depending on the pump cavity type).…”