Single-Fiber Bidirectional Optical Data Links with Monolithic Transceiver Chips

Figure 1

Photograph of a transceiver chip consisting of a VCSEL and an MSM photodiode with indicated ground-signal (GS) microwave probe contacts. The VCSEL is positioned in the center of the photodetector in order to achieve best fiber coupling. The dashed line indicates the optimum alignment of a MMF with 100 μm core diameter (from [9]).