US8682180B1 - Interpolator for high-rate optical communications - Google Patents
US8682180B1 - Interpolator for high-rate optical communications - Google Patents Interpolator …

(57) ABSTRACT A digital coherent receiver converts signals and local light respectively
detected, as detection results, in signal light from an optical transmission line, into digital …

A method for suppressing a skew between a first channel and a second channel in an
optical transmission system having a transmitter that transmits an optical signal with the first …

Compensation for in-phase (I) and quadrature (Q) timing skew and offset in an optical signal
may beachieved based on the correlation between derivatives of I and Q samples in the …

BACKGROUND The present disclosure relates to systems and methods for compensation of
skew between in-phase and quadrature sig nals in a fiber optic communications system …

The reception (102) reception unit includes; a first processing unit processing a first signal
received from a source channel, and including a filtering unit to filter said first signal in digital …

Methods, systems, and devices are described for a digital demodulator device for
processing received optical signals. The device may include a quadrature error filter that …

In some embodiments, an apparatus includes a coherent optical receiver that can receive
during a first time period a set of in-phase signals and a set of quadrature signals having a …

Provided are an optical transceiver, an optical transmitter IC, and an optical receiver IC,
which can be applied to both a case of coding an optical signal and a case of decoding an …

One or more operational parameters associated with pluggable optical transceivers are
estimated to mitigate impairments to an optical signal caused by imperfections in the optical …