HANNOVER MESSE 2020, 20 - 24 April
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Switchable transceiver module

Logo Karlsruher Institut für Technologie


Karlsruher Institut für Technologie

Exhibitor details
Exhibitor details
Logo Switchable transceiver module

Product description

In telecommunications, optical transmission paths are increasingly being used to transmit data with the aid of modulated light signals. Here, laser light is converted into an optical signal with an external optical modulator and transmitted using wavelength division multiplex systems. In order to simultaneously enable transmitting and receiving, separate transmission and reception channels are currently needed whose function has been pre-set. As a result, a larger number of wavelength channels is required. Mutual transmission in one channel is only possible with the aid of complex optical splitters or switches which, however, are rarely used in practice due to high costs. At KIT scientists have developed a transceiver for wavelength division multiplex systems that enables switching from the transmitting to the receiving function in a single channel. The transceiver consists of components that are also used in the common Mach-Zehnder modulators: multimode interferometers (MMI), high-frequency modulators and a photodiode. The special feature are two outputs, one of which is connected to the photodiode. In the transmitting direction, uniform light is fed in, modulated and passed on as a signal. In contrast, in the receiving direction, modulated light is fed in, goes through the transceiver and transmits the signal at the photodiode, which in this case acts as a receiving diode in addition to monitoring proper. Log control allows for the respective mode to be regulated, whereby the modulator becomes a switch. The new transceiver achieves a greater functional scope and dual use without raising the complexity of the chip design. In addition, the transceiver is dynamically reconfigurable if transmission and reception capacities fluctuate.

You can get an overview of this technology at KIT stand. Detailed information can be exchanged individually in contact with the responsible scientific employees of KIT after the industry fair.

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