Open AccessLine defects and temperature effects in liquid crystal tunable planar Bragg gratings
Author(s) -
B.D. Snow,
Faisal Rafiq Mahamd Adikan,
James C. Gates,
C.B.E. Gawith,
A. Dyadyusha,
Malgosia Kaczmarek,
Peter G. R. Smith
Publication year - 2007
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.15.017129
Subject(s) - materials science , optics , disclination , planar , liquid crystal , fiber bragg grating , wavelength , refractive index , optoelectronics , electrode , chemistry , computer graphics (images) , physics , computer science
Liquid crystal tunable planar Bragg Gratings produced by Direct UV Writing are capable of wavelength tuning of over 100GHz. However, such devices exhibit non-linear tuning curves with threshold points and hysteresis. We show that these effects are due to the formation of disclination structures in the liquid crystal and discuss the role of electrode defects and sample temperature on wavelength tuning.