Optical waveguides – With optical coupler – Particular coupling function
Reexamination Certificate
2007-05-29
2007-05-29
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Particular coupling function
C385S024000, C385S122000, C385S123000, C359S337000
Reexamination Certificate
active
10661184
ABSTRACT:
All optical regeneration methods and systems can be realized through an exponential amplifier and a limiting amplifier, which could be two independent devices (one piece of fiber with parametric amplification and a semiconductor optical amplifier operating at saturation state) or one single device (one piece of fiber). The signal quality and the extinction ratio after regeneration are significantly improved compared with the degraded incoming data using a parametric amplifier with the data signal to be regenerated as the pump. The regenerated data has an extinction ratio as high as 14 dB, an extinction ratio enhancement of approximately 5 dB and an approximately 5 dB negative power penalty. This regeneration schemes are format transparent (RZ and NRZ), and provide noise reduction both for bit1's and bit0's of the data sequence. The regeneration method and apparatus that just utilizes fibers has the additional capability of ultrafast response speed (several femtoseconds due to the Kerr effect).
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Li Guifang
Li Yuhua
Font Frank G.
Law Offices of Brian S. Steinberger , P.A.
Mooney Michael P.
Steinberger Brian S.
University of Central Florida Research Foundation Inc.
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