First of all, my assumption is that by 8 optical engine products, they refer to different products, not multiple devices of the same type/product.

Here is what POET has mentioned in the recent release:

1. 800G 2xFR4 receive optical engines with integrated DMUX, photodiodes and trans-impedance amplifier

2. 100G LR4 transmit and receive optical engines for 10km transmission applications. I assume this refers to a single TXRX product, but maybe it is about 2, one TX and one RX ?

3. O-Band LightBar™ products with high-power CW lasers for co-packaged optics and artificial intelligence/machine learning (AI-ML) GPUs. Now, this leaves room for more than 1, what would be different between them?

4. Mechanical demo of 800G 2xFR4 QSFP-DD transceiver

Any thoughts about other products besides the above?

If those are all, that would mean that #3 refers to some 4-5 products (?)