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

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

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Research Areas
Silicon Photonics