All optical RF signal channelizer

Details All optical RF signal channelizer All optical RF signal channelizer

1996-12-04

2000-07-25

Hofsass, Jeffery A.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359127, 372 48, 385 28, 385 37, H04J 1402

Patent

active

060942851

ABSTRACT:
A channelizer for signals for optically channelizing RF signals modulated onto an optical carrier by optically separating the RF signals and mapping the RF signals by way of an optically dispersive element, such as a diffraction grating. In an alternate embodiment of the invention, two stages of optical filters elements are provided in series to perform sequential channelization. Bragg reflection gratings are used for coarse filtering into predetermined bands while Fabry-Perot filters tuned to specific sub-bands of the Bragg reflection gratings are used for channelization. In alternate embodiments of the invention, a silica planar waveguide and an optical splitting device, such as a Talbot splitter, are used.

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