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Wide-band predistortion linearization for externally modulated long-haul analog fiber-optic links

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5 Author(s)
Urick, V.J. ; Naval Res. Lab., Washington, DC, USA ; Rogge, M.S. ; Knapp, P.F. ; Swingen, L.
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We analyze the performance of a custom wide-band predistortion linearizer designed to operate in conjunction with an externally modulated analog photonic link. In addition, we propose an extended spurious-free dynamic-range (SFDR) specification for analog photonic links employing linearization techniques. The benefits of predistortion linearization for analog fiber links limited by optical amplifier noise are demonstrated and a 6-12-GHz 20-km analog link is shown to achieve a SFDR of 108.4 dB·Hz23/, a 6-dB increase relative to the uncompensated link.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:54 ,  Issue: 4 )