Figure 2. Nonlinear optical encryption using tensor (IMAGE)
Caption
The information of light that is scattered and modulated by the nonlinear scattering medium randomly changes, making it difficult to reconstruct the original information, as shown in the right image of (a). This can be referred to as optical encryption. However, by knowing the input-output response characteristics, it is possible to reconstruct the original information from the random output speckle, as shown in (b). This process can be considered as decrypting the encrypted information. With only linear response characteristics that do not involve cross-terms, it was not possible to correctly reconstruct the information, as shown in (c).
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Institute for Basic Science
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