Good work here folks. If I could be allowed to pile on...

I looked at the article preview for the nature photonics submission. When viewing figure 4 at teh bottom of the page I noticed that the laser they have developed is enormous compared to the 500nm POET one that Lee Shepherd described at an even a couple of years ago.

Figure 4 caption:

a, LIV characteristics for a 50 µm × 3,200 µm InAs/GaAs QD laser grown on a silicon substrate under c.w. operation at 18 °C. b, Emission spectra for a 50 µm × 3,200 µm InAs/GaAs QD laser grown on a silicon substrate at various injection…

So I'm assuming that POET has realized a laser with similar dimensions to what Lee described. This would take up a square area of at least 500nm x 500nm = 250000nm^2

Their laser is defined in micrometres (50µm x 3200µm) which when converted to nanometres for comparison gives a rectangular area of 50000nm x 3200000nm = 160000000000 nm^2

POET's laser is 0.00015625% the area of the one produced for this article.

Somebody please check my math, but assuming I'm correct, and assuming no typos in the published preview, then this is far from ready for prime time.