Transceiver imperfections become the primary source of impairment as baud rate and
modulation order grow in advanced optical coherent communications. Thus, transceiver …

We present a digital signal processing (DSP) scheme that performs hyperparameter tuning
(HT) via Bayesian optimization (BO) to autonomously optimize memory tap distribution of …

High precise IQ skewcalibration of the coherent optical transceiver is crucial for high baud
rate and high-order modulation formats optical transmission system. In this paper, a novel …

Tiny mismatches in timing, phase, and/or amplitude between in-phase (I) and quadrature (Q)
tributaries in an electro-optic IQ modulator, namely IQ imbalance, can severely affect high …

The self-homodyne coherent detection (SHCD) system is becoming more popular in intra-
data center applications nowadays. However, for a high-speed SHCD system, the device …

Recently, optical single sideband (SSB) based direct detection (DD) has been considered
as a promising candidate for inter data center interconnects (inter-DCIs). Kramers-Kronig …

The compensation for in-phase/quadrature (IQ) and polarization imbalance residing at the
coherent transceivers is crucial to the overall performance of high-speed transmission …

The performance of the high-baud-rate and high-order-modulation-format short-reach
coherent transmission systems is sensitive to the in-phase and quadrature (IQ) skew. The …

A fast, precise, and low-cost coherent optical transmitter calibration scheme is proposed that
uses multi-tone signals of a novel, to the best of our knowledge, design with unequal …

For 800 Gbps/λ and beyond optical transmission systems, frequency-dependent
impairments (FDI) degrade coherent optical transceiver (CO-TRx) performance severely …