Nonvolatile holograms were recorded by using a long wavelength of 633 nm (He-Ne laser) for recording and a short wavelength of 458 nm (Argon ion laser) for sensitizing in double doped LiNbO₃:Cu:Ce crystals. The sensitizing light increases the recording sensitivity by a - bexp(-I_s/c) and saturation behavior will appear with high enough intensity of sensitizing light. The recording light increases the slope of (eta) ^1/2 as a function of time during the initial stages of hologram formation by sublinear I_r^x (x < 1) and thus the recording light decreases the recording sensitivity. The dependence of saturation diffraction efficiency on the intensities of the recording and sensitizing light shows that there is a maximum dynamic range of the recording process.

Date Published: 23 January 2002
PDF: 6 pages
Proc. SPIE 4459, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage, (23 January 2002); doi: 10.1117/12.454023

Published in SPIE Proceedings Vol. 4459:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage
Shizhuo Yin; Hans J. Coufal; Francis T. S. Yu; Hans J. Coufal, Editor(s)