On-chip Detection from Directly Modulated Quantum Dot Microring Lasers on Si

Author(s)
Y. Wan, D. Jung, D, Inoue, J. C. Norman, C. Shang, A. C. Gossard, and J. E. Bowers
Publication Image
L-I curves as a function of the heatsink temperature. Inset: laser threshold versus temperature curve and fitting.
Publication Date
Publication Type
Conference
Journal/Conference Name
2018 Progress In Electromagnetics Research Symposium (PIERS)
Indexing
Toyama, Japan

We present on-chip detection from directly modulated microring quantum-dot (QD) lasers grown on exact (001) Si. Static and dynamic properties of the QD-based microring lasers and microdetectors have been investigated. The ring lasers exhibit high temperature stabilities up to 100± C, low thresholds down to sub milliamp, and a wide 3 dB bandwidth up to 6.5 GHz. The microdetectors show small dark currents down to 0.2 nA and eye openings up to 10 Gbit/s with non-return-to-zero signals. Light emission from the microring lasers can be probed via the changes in the photocurrent of the microdetectors, realizing on-chip QD laser and detector system on Si by epitaxy. Furthermore, demonstrated downscaling abilities of the QD based devices promise improved integration density for photonic integrated circuits (PIC).

Publication File
Research Areas
Silicon Photonics