Nanoscale laser isolator could revolutionize photonics devices

https://www.laserfocusworld.com/lasers-sources/article/14293154/nanoscale-laser-isolator-could-revolutionize-photonics-devices

"CMOS, narrow linewidth, nonmagnetic, no other external parts... fully passive and require no power... Ring resonators optical nonlinearity allows incoming laser build power, circulating clockwis strengthening via resonance transmits near-unity power... prevents back-reflected light from resonating and transmitting... Cascading 2 isolators on same chip isolation ratio 35 dB insertion loss 5 dB...  turnkey frequency combs to TB communications, on-chip optical amplifiers, and quantum computing systems”

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