Étude et réalisation de nouvelles fonctions en optique intégrée sur verre pour des
applications astrophysiques
Variante de point d'accès
Realization of new integrated optics functions for astrophysical purposes
Notes
Note publique d'information :
IN THIS WORK, WE ARE INTERESTED IN INTEGRATED OPTICS BEAM COMBINERS FOR ASTRONOMICAL
USES. THE STUDY OF THE ASTRONOMICALS SYSTEM'S NEEDS AND THE STATE OF THE ART HAS LED
US TO PROPOSE A SOLUTION BASED ON THE MULTI-MODE INTERFERENCE. THIS STRUCTURE HAS
BEEN REALIZED BY THE ION EXCHANGE IN GLASS. THE STRUCTURED DESIGN IS BASED ON THE
USE OF EXISTING TOOLS LIKE THE BEAM PROPAGATION METHOD AND ALSO THE DEVELOPMENT O
F NEW SOFTWARES ADAPTED TO THE ASTRONOMICAL CASE. VARIOUS CHARACTERIZATION METHODS
HAVE BEEN DEVELOPPED TO STUDY THE COMPONENT PERFORMANCES. BEYOND CLASSICAL TOOLS LIKE
CUT-OFF OR SPECTRAL ANALYSIS, NEW SETUPS HAVE BEEN APPLIED. CHARACTERIZATIONS SHOW
THAT THIS KIND OF STRUCTURE FULFILLS THE NEED FOR THE BEAM COMBINATION OF FOUR TELESCOPES.
INDEED, FRINGES ARE CREATED AND THE MEASURE OF THE PHASE CLOSURE WITH A LASER IS EXCELLENT.
HOWEVER, THE HIGH LEVEL LOSSES NECESSITATES A CHANGE OF ION EXCHANGED COUPLE.