Title :
Optical encryption system based on circular polarization and interferometer
Author :
Cho, Kyu-Bo ; Chang-Mok Shin ; Seo, Dong-Hoan ; Park, Sang-Gug ; Doh, Yang-Hoi ; Kim, Soo-Joong
Author_Institution :
Dept. of Electron. Eng., Kyungpook Nat. Univ., Daegu, South Korea
Abstract :
We propose an optical encryption system using circular polarization based on interferometer architecture. The phase-modulated input image, represented as orthogonal linearly polarized states by interferometer, is encrypted into circularly polarized states whose direction of the rotation is random. In the decryption we use the inverse matrix of polarization-modulation key and can recover the original polarization states.
Keywords :
Mach-Zehnder interferometers; decoding; image coding; light interference; light polarisation; optical polarisers; quantum cryptography; circular polarization; decryption; interferometer; optical encryption system; phase-modulated input image; polarization-modulation key; polarized states; Cryptography; Electronic mail; Optical computing; Optical filters; Optical interferometry; Optical modulation; Optical polarization; Optical retarders; Optimized production technology; Personal digital assistants;
Conference_Titel :
Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on
Print_ISBN :
0-7803-7766-4
DOI :
10.1109/CLEOPR.2003.1276978
