Conjoined 'racetracks' enable very low power, scalable optical device

https://phys.org/news/2023-12-conjoined-racetracks-optical-device.html

"short pulses form in ultra-low-loss, pure, thin-film silicon nitride microcombs... during operation, solitons automatically form and circulate like racetracks in figure 8 with conjoined section of 2 microcombs forcing paired laser pulses to bunch up, which counteracts dispersion that had been destabilizing soliton pulses... scalable (can combine more than 2) and turnkey using same manufacturing currently used for computer chips... very energy efficient... digital communications, precision time keeping, spectroscopy, astronomy"

Related: A micro-ring resonator with big potential: Hybrid device significantly improves laser technology
https://phys.org/news/2023-12-micro-ring-resonator-big-potential-hybrid.html