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The development of integrated semiconductor lasers has miniaturized traditional
bulky laser systems, enabling a wide range of photonic applications. A
progression from pure III-V based lasers to III-V/external cavity structures has
harnessed low-loss waveguides in different material systems, leading to significant
improvements in laser coherence and stability. Despite these successes,
however, key functions remain absent. In this work, we address a
critical missing function by integrating the Pockels effect into a semiconductor

Superconducting circuits can operate at higher energy efficiencies than their room-temperature counterparts and have the potential
to enable large-scale control and readout of quantum computers. However, the required interface with room-temperature
electronics creates difficulties in scaling up such cryogenic systems. One option is to use optical fibres as a medium in conjunction
with fast optical modulators that can be efficiently driven by electrical signals at low temperatures. However, as superconducting