Abstract
Photonic microwave downconversion based on an optoelectronic oscillator
(OEO) is interesting because the local oscillator signal is directly extracted
from the RF signal, but some of the frequency components in the RF signal
would leak to the oscillation signal due to the limited rejection ratio of
the electrical bandpass filter in the OEO, which degrades the downconverted
signal. In this paper, a high-performance photonic microwave downconverter
based on a frequency-doubling OEO (FD-OEO) is proposed and demonstrated to
avoid the direct degradation from the RF signal. A 20-GHz RF signal with 1-Gb/s
data modulation is successfully downconverted by the FD-OEO. The phase noise
at 10-kHz frequency offset of the extracted RF carrier by the FD-OEO is 14
dB lower than that extracted by a conventional OEO, and the receiver sensitivity
of the downconverted signal has a 1.173-dB improvement. The downconverter
needs only low-frequency devices, which may find application in phased-array
antenna arrays, electronic warfare receivers, avionics, and wireless communication
systems.
© 2012 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription