All-optical holographic code division multiple access switch

Details All-optical holographic code division multiple access switch All-optical holographic code division multiple access switch

2005-01-18

2005-01-18

Boutsikaris, Leo (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S029000, C359S559000, C382S210000, C382S211000

Reexamination Certificate

active

06844947

ABSTRACT:
A technique for processing optical input signals to produce optical output signals using only a single hologram for a plurality of circularly shifted code words used to encode the input signals. A spatial light modulator coupled to the each of the optical input signals encodes a corresponding one of the input optical signals, and the optical signals are linear combined for further processing. A matched filter composed of the single hologram receives the linear combination, and a two-dimensional microlens arrangement coupled to the matched filter emits each of the optical output signals from a corresponding microlens in the arrangement. Switching is engendered by controlling each spatial light modulator to thereby direct each input signal to the desired one of the microlens in the arrangement.

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K. Takasago et al., “Spatial-phase code-division multiple-access system with multiplexed Fourier holography switching for reconfigurable optical interconnection”, Applied Optics 39(14), pp. 2278-2286(2000).*
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Takasago et al, “Spatial-phase code-division multiple-access system with multiplexed Fourier holography switching for reconfigurable optical interconnection”, Applied Optics, vol. 39, No. 14, May 10, 2000, pp. 2278-2286.
Crossland et al., “Holographic Optical Switching: The ROSES Demostrator” Journal of Lightwave Technology, vol. 18, No. 12, Dec., 2000, pp. 1845-1854.

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