Title :
Evidence of electron compensation in a LiNbO3:Fe holographic optical filter
Author :
Krainak, Michael A. ; Yu, Anthony W.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
We present experimental evidence of electron compensation of a fixed ionic hologram in a photorefractive iron doped lithium niobate crystal. When the hologram is stored in the dark, the fixed hologram diffraction efficiency decreased from 20% to 6% in a 15 day period. 30 J/cm/sup 2/ of 488 nm wavelength uniform illumination was required to mitigate the electron compensation and restore the diffraction efficiency to 20% (reveal the fixed ionic grating).
Keywords :
holographic optical elements; iron; lithium compounds; optical filters; photorefractive materials; 488 nm; 6 to 20 percent; LiNbO/sub 3/:Fe; diffraction efficiency; electron compensation; fixed ionic hologram; holographic optical filter; photorefractive iron doped lithium niobate crystal; Electrons; Gratings; Holographic optical components; Holography; Iron; Laser modes; Laser tuning; Lithium niobate; Optical filters; Temperature;
Journal_Title :
Photonics Technology Letters, IEEE
