The patent described appears to be evolutionary or an early stage of development for improving coupling efficiency to fiber using lenses.

As we know  POET's optical  interposer does not use lenses and the coupling efficiency and mode conversion using just the dielectric waveguide in the optical interposer design input/output between both fiber and InP chips is  very good as per Suresh's presentation to  industry. https://poet-technologies.com/docs/presentations/POET%20CIOE%20Presentation_Sept_2018_FINAL.pdf 

Clearly many here want to see more than just the results of testing presented in the above presentation. It is difficult for most to follow. For many of us if you were invested in a junior miner that just announced a discovery hole drill intercept of  25g/t Au across 25 meters at shallow depth the result would be an immediate recognition of what that is.

Unfortunately it is much more difficult for people to appreciate what it is that POET has. So what is the answer? Apparently people do not trust/understand the information that has been presented. They see the work force that POET has assembled and though it is a clear indication that the company is reaching staffing levels required for product delivery and major commercial growth they never the less  become very suspicious as to how the company will pay for it.

Bottom line though is that if a junior explorer announces a discovery hole the share price responds in an extreme way to the news. That company will almost always do  a financing to  continue and ramp  up  the drill program especially if their season is  coming to  an end and they know that the share price will go  into decline until  the next drill  season.

Investing is complicated at the best of times and when we are talking about new technologies with geopolitical considerations there will always be levels of shareholder uncertainty. Uncertainty is the trader’s friend. Long term investors who don’t normally trade the ups and downs just feel burned and will always look for answers that explain the share price which unfortunately becomes align with trader’s opportunities.