30 research outputs found
Wavelength conversion of QAM signals in a low loss CMOS compatible spiral waveguide
We demonstrate wavelength conversion of quadrature amplitude modulation (QAM)
signals,
including 32-GBd quadrature phase-shift keying and 10-GBd 16-QAM, in a 50-cm long high
index doped
glass spiral
waveguide. The quality of the generated idlers for up to 20 nm of
wavelength shift is sufficient to achieve a BER performance below the hard decision
forward error correction threshold BER performance (<3.8 × 103), with an
optical signal-to-noise ratio penalty of less than 0.3 dB compared to the original
signal.
Our results confirm that this is a promising platform for nonlinear
optical signal
processing, as a result of both very low linear propagation loss
(<0.07 dB/cm) and a large material bandgap, which in turn ensures negligible
nonlinear loss
at telecom
wavelengths