Nonlinear optical frequency conversion integrates 2 primary components as single silicon nitride chip laser that can produce any light color

https://www.eurekalert.org/news-releases/1124398

"microscopic semiconductor lasers can't easily change wavelength/ fixed base on material... overcome using microring resonators: tiny, loop-shaped tracks trapping IR from standard IR laser cycles light 1,000s of times, nonlinear interaction with material generating new frequencies (not only IR)... tunable adjusting microrings' dimensions... needs only battery power... quantum computing: trap/ manipulate individual atoms/ ions, medical diagnostics, telecommunications, optical atomic clocks not reliant on GPS"