TeraSignal, a start-up based in Irvine, California, introduced an intelligent 400G (4x100G) PAM4 modulator driver with digital link training and link monitoring for 800G linear pluggable optical (LPO) modules. The novel modulator driver addresses the limitations of LPO modules, which unlike DSP-based re-timers, have lacked the capabilities for automatic adaptation, digital link monitoring and link training, making them challenging to integrate, interoperate, and deploy efficiently.
Armond Hairapetian, Founder and CTO from Terasignal, explains:
– The introduction of an intelligent retiree for LPO applications, which eliminates the need for a DSP inside the module
– The transition from Silicon germanium design to CMOS, which not only reduces power but also introduces diagnostic features in the chip, allowing end users to assess link quality and extract vital diagnostic information.
– The implementation of a digital subsampling scope on chip, which enables the capture of the Eye diagram, SNR, and BR of the link, providing end users with precise information about the link’s performance and the ability to adjust the transmitter as needed.
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