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Key building blocks of a silicon photonic integrated transmitter for future detector instrumentation

The data throughput of future detector readout systems is ever increasing. We propose a high-performance optical link, based on silicon photonics and wavelength-division multiplexing (WDM) technology, to cope with ultra-broad bandwidth requirements. The key components of the proposed optical link are monolithically integrated transmitter units, each one integrating multi-channel on-chip Echelle grating (de-)multiplexers and Mach-Zehnder modulators (MZMs). In our current design, each transmitter unit consists of four MZMs, which corresponds to four transmission channels with distinct optical carrier wavelengths, a common optical demultiplexer and a common optical multiplexer. In this paper, we present the design and experimental results of all these building blocks as well as a first transmission experiment. Additionally, experimental results of a thermal modulator to be used in a future design for working point control are presented.