Compact hybrid silicon microring resonator lasers

Compact hybrid silicon microring resonator lasers and modulators are being investigated presently.  The attractive figures of merit include good spectral purity and easiness of on-chip integration for traveling-wave light propagation nature, small footprint, and unique unidirectional bistability.  They are promising candiates for high-speed, low-power consumption optical interconnects, memories, all optical signal processing and seneors, etc.

EpumpRing: (left) Pulsed light-current characteristic of an electrically-pumped hybrid silicon microring laser with 1529 nm emission wavelength; (top right) Device schematic; (top center) SEM top-view of a device with 50 mm diameter;  (top bottom) Infrared image of a device under 25 mA CW injection current.

OpumpRing: (left) CW light-light characteristic of an optically-pumped hybrid silicon microring laser, inset: infrared image of a device in operation; (right) Device layout. insets: SEM top-view of a device with 15 mm diameter and SEM side-view of the ring resonator and bus waveguide.