Service providers are looking for higher bandwidth to meet the growing demand of next generation data centres. According to the Inphi latest media publishing, the IN4514SZ, IN4518SZ and IN4550TA Mach Zehnder modulator drivers are designed to take network infrastructure to the next level, enabling the critical implementation of more complex and flexible modulation formats for 200G and 400G coherent systems in the long haul and metro networks.
In Mach-Zehnder modulator, the input wave is launched into a directional coupler. The power of the input is split equally into the two output wave-guides of the first directional coupler. Those two wave-guides form the two arms of a Mach-Zehnder inter-ferometer. On one of the arms, you can apply an electric field to modify the refractive index in the material and thus, modify the phase for the wave propagating through that arm. The two waves are then combined into another 50/50 directional coupler. By changing the applied voltage, you can continuously control the amount of light exiting from the two output wave-guides.
According to the Inphi’s release, “IN4518SZ IC belongs to 45GBaud Linear Coherent family. The following IC is a quad linear differential to single-ended Mach-Zehnder Modulator Driver. Pin-compatible with the award winning and field deployed linear driver IN3214SZ, for 200G coherent Optical Interconnect applications, the IN4518SZ extends the reach of 200G coherent for long haul applications and enables one set of hardware to serve multiple segments in the long haul and metro markets.”
Further in an interview, Lian Zhao, product line manager, Optical Interconnect at Inphi said, “The IN4518SZ is the latest addition to our 45GBaud Linear Family to address market demands for high-performance linear drivers that can manage the growing traffic between data centers. It affirms Inphi’s market leadership to enable dynamic, next-generation optical networking and gives existing 100G/200G coherent system designs an efficient upgrade path to 400G and beyond.”