Realization of a high power optical trapping setup free from thermal lensing effects
Authors: Simonelli C., Neri E., Ciamei A., Goti I., Inguscio M., Trenkwalder A., Zaccanti M.
Autors Affiliation: CNR, INO, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; Univ Firenze, European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, Italy; Campus Biomed Univ Rome, Dept Engn, I-00128 Rome, Italy
Abstract: Transmission of high power laser beams through partially absorbing materials modifies the light propagation via a thermally-induced effect known as thermal lensing. This may cause changes in the beam waist position and degrade the beam quality. Here we characterize the effect of thermal lensing associated with the different elements typically employed in an optical trapping setup for cold atoms experiments. We find that the only relevant thermal lens is represented by the TeO2 crystal of the acousto-optic modulator exploited to adjust the laser power on the atomic sample. We then devise a simple and totally passive scheme that enables to realize an inexpensive optical trapping apparatus essentially free from thermal lensing effects. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Journal/Review: OPTICS EXPRESS
Volume: 27 (19) Pages from: 27215 to: 27228
KeyWords: DISTORTION; TEMPERATUREDOI: 10.1364/OE.27.027215Citations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-06-28References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here