Crosstalk in Photon-Mode Photochromic Multi-Wavelength Recording

Abstract

The mechanism of crosstalk in photon-mode multi-wavelength recording has been theoretically analyzed, and a new method to reduce the crosstalk is proposed in this paper. The crosstalk has linear components of superposition and nonlinear components due to intermodulation. Both can be reduced by linear and nonlinear mixing of the readout signals at λ _i (i=1,2,…). This reduction method was applied to photochromic optical media having two broad absorption bands which were superimposed with each other. Thus 2-wavelength recording (writing and reading) was achieved.