The FOXQ6411C1BL is an optical sub-assembly combining all the key building blocks of a coherent optical front-end as well as the associated control circuitry. The part is designed to meet the requirements for a Type-2 IC-TROSA as specified in the OIF IC-TROSA implementation agreement. The device is full C-band tunable and supports multiple modulation formats including QPSK, 8QAM, and 16QAM at symbol rates >60GBd, enabling data transmission up to 400Gb/s. The IC-TROSA’s low power dissipation and miniature footprint enables small form factor Digital Coherent Optics (DCO) transceivers in a QSFP-DD or OSFP form factor, as well as very high-density coherent line card or daughter card designs. Since the IC-TROSA is a fully calibrated and tested assembly instead of a disaggregate set of components, it yields operational cost savings for the line card or pluggable module integrator due to the lower number of assembly steps and reduced test times.