Open AccessUltrafast laser inscription of volume phase gratings with low refractive index modulation and self-images of high visibility
Author(s) -
António Dias,
Ainara Rodríguez,
Miguel Martínez-Calderón,
M. Gómez-Aranzadi,
Santiago M. Olaizola
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.026683
Subject(s) - optics , materials science , refractive index , visibility , laser , image stitching , phase (matter) , ultrashort pulse , planar , borosilicate glass , optoelectronics , physics , computer graphics (images) , quantum mechanics , computer science , composite material
Ultrafast laser inscription of volume phase gratings with low index contrast and self-images with visibility of 0.96 is demonstrated. It is also demonstrated that phase differences of π/2 for visible light are achievable with only one layer of structures induced in bulk borosilicate glass by direct laser writing. The fabrication method avoids the stitching of several layers of structures and significantly reduces the time of process. The increment of visibility with the induced phase difference is proved and results are compared with the expected for planar phase gratings.