From Slide 24 of the AGM ppt:
2019 Platform building blocks for 400G on track for completion
﹘Lasers, PIN Detectors, FR4 Filters, and Optical Interposer
2020 1H: Strategic Customer Product Development and Qualification
﹘ Chip-scale photonics integration for 400G TxRx
﹘ Wafer-scale assembly & test
2020 2H: Assembled Product Qualification / Supply Chain Readiness