[en] We present a two-dimensional (2D) spatial lock-in amplifier that provides a contrast ratio of more than 10,000:1 for transmitted and blocked intensity patterns using a conventional liquid-crystal spatial light modulator. The device is based on spatial-domain modulation–demodulation of intensity patterns under coherent imaging conditions. The operation of the 2D lock-in amplifier is illustrated by implementing Young’s double-slit arrangement for measurements of the mutual coherence between individual emitters of a 2D phase-coupled array of vertical cavity surface emitting lasers.
Disciplines :
Electrical & electronics engineering Physics
Author, co-author :
Lousberg, Grégory ; Université de Liège - ULiège / Ecole Polytechnique Fédérale de Lausanne - EPFL > Dept. de Physique > Laboratory of Physics of Nanostructures (LPN) > 3ème technique Ing. Civ. Physicien
Lundeberg, Lars; Ecole Polytechnique Fédérale de Lausanne - EPFL > Dept. de Physique > Laboratory of Physics of Nanostructures
Boiko, Dmitri; Ecole Polytechnique Fédérale de Lausanne - EPFL > Dept. de Physique > Laboratory of Physics of Nanostructures
Kapon, Eli; Ecole Polytechnique Fédérale de Lausanne - EPFL > Dept. de Physique > Laboratory of Physics of Nanostructures
Language :
English
Title :
Space-domain lock-in amplifier based on a liquid-crystal spatial light modulator
Publication date :
April 2006
Journal title :
Optics Letters
ISSN :
0146-9592
eISSN :
1539-4794
Publisher :
American Institute of Physics, New York, United States - New York
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