I took a quick look. Innolight’s website will not open. On checking the Eoptolink website there were no 800G products with 200G Lambda listed. 

I can try to get some numbers for you but the best I can do right now is provide the info that was submitted to VLSI-IEEE Symposium Accepted Paper on Wafer-Scale Hybrid Integration 

The material loss through the waveguides characterized by prism spectroscopy is <0.3dB/cm and is about one order of magnitude better than typically observed in small core silicon waveguides used in most other silicon photonics technologies.

The company maintains that POETs Optical Interposer EML solutions will be more competitive than Silicon Photonic EML solutions. I guess the market will ultimately decide.

Certainly development costs have been extremely low given that the prototyping line in Singapore (paid for by NUS) and a manufacturing line in China (paid for by Sanan) – neither of which took cash out of the company. And we can add that the development time appears to be very quick as per my previous post given the adaptability and flexibility of the Optical Interposer.  

Suresh was the creator of the Optical Interposer and since inception it has become a go to approach across the industry which tells you something significant. I posted a very early document produced by Suresh some time ago which describes the evolution of the semiconductor hybrid integration path that industry has settled on. It provides a model for the early evolution of the Optical Interposer. Although it is an old paper it shows how revolutionary Suresh’s approach is.