title: Multireflection pumping concept for miniaturized diode-pumped solid-state lasers.
abstract: An innovative pump concept for diode-pumped, solid-state lasers is introduced as an example for an Er:YSGG laser, permitting its miniaturization. Embedded in a multireflective pump cavity, the laser crystal is simultaneously side and end pumped. Specially calculated and shaped deflecting optics distribute the coaxially input pumping light homogeneously over the lateral surface of the crystal, therefore reducing the size of the laser head, including the optical resonator, to a length of 27.5 mm and an outside diameter of 12.5 mm. The differential efficiency achieved is between 8.7% and 24%. The laser emits energy of 15.7 mJ at an absolute efficiency of 9.1% and a repetition rate of 4 Hz.
authors.affiliation: Department of Conservative Dentistry, Periodontology and Preventive Dentistry, Aachen University, Pauwelsstrasse 30, 52074 Aachen, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Meister
authors.forename: Rene
authors.initials: R
authors.lastname: Franzen
authors.forename: Christian
authors.initials: C
authors.lastname: Apel
authors.forename: Norbert
authors.initials: N
authors.lastname: Gutknecht
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D053685:Laser Therapy; D007834:Lasers; D008904:Miniaturization / Q000379:methods*