Readout of binary holographic data without direct photon-grating interactions

Ju-Seog Jang; Dong-Hak Shin

doi:10.1117/12.370237

22 November 1999 Readout of binary holographic data without direct photon-grating interactions

Ju-Seog Jang, Dong-Hak Shin

Proceedings Volume 3802, Advanced Optical Data Storage: Materials, Systems, and Interfaces to Computers; (1999) https://doi.org/10.1117/12.370237
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We explain that it is possible in principle to detect a change in light transmittance and phase shift of transparent materials without exposing even a single photon on them. Based on such interaction-free measurement, novel rewritable optical memories can be constructed with a photo-sensitive medium. In this case, even if the stored data are vulnerable to light, they can be read out without (or, at least a reduced) data impairment, because there is no (or, at least a reduced) interaction between the photon and the medium. We also discuss the effect of two system imperfections, the system loss and the low quantum efficiency of photon detectors, when such memories are to be implemented.

Citation Download Citation

Ju-Seog Jang and Dong-Hak Shin "Readout of binary holographic data without direct photon-grating interactions", Proc. SPIE 3802, Advanced Optical Data Storage: Materials, Systems, and Interfaces to Computers, (22 November 1999); https://doi.org/10.1117/12.370237

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