Abstract
We propose and experimentally demonstrate a novel scheme to realize
electrical/optical (E/O) conversion on the receiver side of a wireless fiber integration
system at the W band. At the receiver, a directly modulated laser (DML) is used to
realize E/O conversion. The received 85 GHz wireless millimeter-wave (mm-wave) signal is
first down-converted into a 10 GHz electrical intermediate-frequency (IF) signal to
overcome the insufficient bandwidth of the subsequent DML. Then, two cascaded electrical
amplifiers (EAs) are employed to boost the electrical IF signal before it is used to
drive a DML. By using this scheme, we transmit a 10 Gb/s 16 quadrature amplitude
modulation (16QAM) signal over a 10 m wireless link, and then deliver it over a 2 km
single-mode fiber-28 (SMF-28) wire link with a bit error ratio (BER) that is less than
the hard-decision forward error correction threshold of 3.8×10-3. Our
experimental results show that the DML is good device to be used for the E/O conversion
of a 16QAM signal.
© 2015 Chinese Laser Press
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