CROSSTALK IN PHOTON-MODE PHOTOCHROMIC MULTIWAVELENGTH RECORDING

The mechanism of crosstalk in photon-mode multi-wavelength recording h as been theoretically analyzed, and a new method to reduce the crossta lk is proposed in this paper. The crosstalk has linear components of s uperposition and nonlinear components due to intermodulation. Both can be reduced by linear and nonlinear mixing of the readout signals at l ambda(i) (i = 1, 2,...). This reduction method was applied to photochr omic optical media having two broad absorption bands which were superi mposed with each other. Thus 2-wavelength recording (writing and readi ng) was achieved.