Abstract
This paper demonstrates a new type of an optoelectronic oscillator (OEO)
that employs a polarization modulator (PolM) for realizing prescaled optical
clock recovery and 1 : 2 serial-to-parallel conversion of optical
data signals. By injecting the 40-Gb/s return-to-zero data signals along with
the continuous-wave light, the PolM-OEO generates the 20-GHz clock and two
20-Gb/s data streams simultaneously. The OEO is based on the concept of the
regenerative frequency divider, which ensures stable injection-locked operation
at 20 GHz even in the absence of subharmonic tones in the input signal. The
PolM-OEO is applicable to all-optical modulation format conversion from on
off keying to quadrature phase shift keying by combining it with a cross-phase
modulation-based wavelength converter.
© 2009 IEEE
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