Demonstration of holographic read-only-memory mastering, replication, and playback with a compact reader
Chuang E., Sissom B., Harris R., Malang K., Bergman C., Hill A., Bell B., Curtis K.
Development prototype systems for holographic read-only-memory (ROM) are demonstrated, capable of high density recording at 406.7 nm wavelength with 0.71 numerical aperture optics. A phase-conjugate Fourier transform lens is developed for improved capacity and tolerances and incorporated into a fully functional compact reader about 1 cm in height. The capacity target for the first generation is 4 Gbytes in a 42 × 35 mm 2 media card. Two-step mastering, replication, and playback are demonstrated for digital audio stored in 125 holograms.©2008 The Japan Society of Applied Physecs.