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A directly modulated photonic crystal (PhC) laser with a wavelength-scale cavity is a key component for chip-to-chip and on-chip optical interconnections because it enables us to achieve ultralow operating energy. A buried heterostructure, where the wavelength-scale active region is buried with an InP layer, is essential for achieving ultralow operating energy because it improves both carrier and...
We evaluated high-speed behaviour of electrically driven photonic crystal lasers by direct modulations and found that they had 17.8-GHz 3-dB bandwidth. A 25-Gbit/s eye diagram was also demonstrated with a bias current as low as 150 μA.
We describe the room temperature CW operation of an ultra-small buried heterostructure photonic crystal laser. The threshold power is only 1.5 µW, the fiber output power is 0.44 µW, and the 3-dB modulation speed is 5.5 GHz.
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