Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-04-30
2000-01-18
Hofsass, Jeffery A.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359127, 359130, 359128, 359129, 359159, 385 43, H04J 1402
Patent
active
060162120
ABSTRACT:
A free-space wavelength division multiplexing system is provided having a demultiplexer and receiver arrangement. The demultiplexer and receiver arrangement may be based on a rotatable interference filter. A desired wavelength can be selected by adjusting the angle of the interference filter with respect to the incoming light beam. Alternatively, the demultiplexer and receiver arrangement may be based on a diffraction grating. Multiple wavelengths of light are diffracted at different angles, which spatially separates each wavelength in the system. A corresponding multiple-element linear photodetector array is used to receive the spatially separated optical signals.
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Durant Gregory M.
Rutledge Christopher L.
AT&T Corp
Hofsass Jeffery A.
Tweel , Jr. John
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