The Lumentum CFP2-ACO pluggable transceiver is a hot-pluggable CFP2 MSA-compatible module designed for 4×32 Gbaud (128 Gbps) coherent point-to-point and metro applications. It incorporates Lumentum co-packaged indium-phosphide (InP) DSDBR narrow-linewidth laser with InP dual-cartesian Mach-Zehnder and polarization multiplexer to support PM-QPSK transmission. The module is fully calibrated for all configured channels in the C band. The transmitter and local oscillator signals are derived from the same laser. The module supports flexible grid operation enabling frequency control to a resolution of 1 MHz, and local off-grid tuning within ±6 GHz.