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.

Design of an error-correcting code for two-layer high-capacity optical storage

“…So if a burst error occurs, the data of all the layers will be mistaken. The other important error source is crosstalk between different layers [4].…”

Synthesis of a Novel Photochromic Diarylethene and Its Application in Optical Recording Storage

“…Photochromic diarylethenes undergo reversible photoinduced cyclization and cycloreversion reactions between two isomers upon irradiation with UV/visible light. Among various types of photochromic compounds, such as, spirobenzopyrans, azobenzenes, diarylethenes and fulgides, diarylethene derivatives with heterocyclic aryl rings are the most promising organic photochromic compounds because of the excellent thermal stability of two isomers, fatigue resistant character, rapid response and high reactivity in solid state, which could be potentially used for application to optical memory media [5][6][7], switching devices [8], display materials [9,10], photomechanical actuators [11,12], and so on. These properties enable diarylethene to have the most applicable potential for future high-density optical storage [13].…”

Property of a Novel Unsymmetrical Diarylethene Bearing a Benzothiophene for Optical Recording

“…Photochromic diarylethenes undergo reversible photoinduced cyclization and cycloreversion reactions between two isomers upon irradiation with UV and visible light [8][9]. Among various photochromic compounds, diarylethenes exhibit some excellent characteristics, such materials can be potentially used for application to optical memory media [10][11][12], switching devices [13], display materials [14,15], photo-mechanical actuators [16,17], and so on. These properties enable diarylethenes to have the most applicable potential for future high-density optical storage, and lots of papers are reported [18][19][20].…”