Small-signal modulation and 10 Gb/s data transmission by microdisk lasers based on InGaAs/GaAs quantum well-dots
We show that using dense arrays of InGaAs quantum well-dots enables uncooled high-frequency applications with a
GHz-range bandwidth. A maximum 3-dB modulation frequency of about 6 GHz was found. The K-limited maximal
frequency of 13 GHz was estimated from the modulation response analysis. The experimental values of the energy-todata
reaches 1.5 pJ/bit for the smallest diameter under study (10 μm). A 23 μm in diameter microlaser exhibits open eye
diagram up to 12.5 Gbit/s and is capable of error-free 10 Gbit/s data transmission at 30ºC without temperature
stabilization. Our results demonstrate the potential to achieve miniature high-speed on-chip light sources for optical
communication applications using lasers with a diameter of only a few micrometers.