Telecommunications optical processor

Details Telecommunications optical processor Telecommunications optical processor

2006-01-10

2006-01-10

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With reflecting element

C359S291000, C385S024000, C398S088000

Reexamination Certificate

active

06985308

ABSTRACT:
A demultiplexer for use in a wavelength-division multiplexed optical system including a first positive lens group, a negative lens group, and a second positive lens group in order from a dispersive element and a reflective element. In some embodiments the reflective element is a light modulator, such as an actuatable diffraction grating. In some embodiments the demultiplexer is a part of a dynamic channel equalizer. In embodiments having a light modulator, the modulation may occur during both a first pass and a second pass.

REFERENCES:
patent: 5745271 (1998-04-01), Ford et al.
patent: 6108471 (2000-08-01), Zhang et al.
patent: 6275623 (2001-08-01), Brophy et al.
patent: 6384959 (2002-05-01), Furlani et al.
patent: 1126294 (2001-08-01), None
patent: WO 01/11419 (2001-02-01), None
Andrew Sappey and Pei Huang, Free-Space Diffraction Gratings Allow Denser Channel Spacing, WDM Solutions magazine, Dec., 2001, pp. 39-41.

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