Link-all’s LAQD-DR4+ is a 4 x 100G QSFP-DD FR1 optical transceiver that provides 4 parallel 100GE links over 4 single mode fiber (SMF) pairs via its MPO-12 connector. Each fiber pair link is compliant to 100GBASE-FR1 and thus can support a 400GE to 4 x 100GE breakout over 2 km. It combines 8x 26.5625 GBd PAM4 electrical lanes into 4 x 53.125 GBd PAM4 optical lanes. Superior performance and reliability is achieved through Link-all’s advanced transmitter and receiver design using cooled EA-DFB-LDs each at a CWDM 1.3 µm wavelength and 4 x PIN PDs.