Abstract: Automatic selection and setting an operational data rate of an optoelectronic device. In particular, an integrated circuit includes a data rate select input for the selection and setting of the operational data rate. The integrated circuit internally generates a loss of lock signal if an input data rate does not match the operational data rate. The integrated circuit then automatically sets and selects operational data rates within a predetermined range of operational data rates until the loss of lock signal is deasserted or until all of the rates within the predetermined range of operational data rates have been attempted.

Abstract: The invention relates to a coupling unit for coupling an optical transmitting and/or receiving module to an optical fiber. The coupling unit has a connecting area that can be connected to a transmitting and/or receiving module, and a holding area that holds an optical fiber. A transparent coupling area is provided, which is formed as an integral component of the coupling unit, and via which light can be coupled directly between an optical fiber that is inserted into the holding area and a transmitting and/or receiving module that is coupled directly to it. The coupling area preferably has a matched refractive index. The coupling unit is preferably in the form of an injection-molded part.