App Note: Managing Chromatic Dispersion in 100G PAM4 DWDM Links

As bandwidth demand has surged in the last few years and especially over the last weeks, service and internet content providers have looked for future-proof, low-cost and low power consumption solutions to increase bandwidth. For applications limited to 80 km or less, such as DCI, 100G direct-detection solutions based on four-level pulse amplitude modulation (PAM4) have proven an interesting avenue, but managing chromatic dispersion holds back many organizations who fear it will be a burden.

This application note will show how the ClearSpectrum™ TDCMX-SM makes managing chromatic dispersion simple and cost-effective, enabling the advantages of 100G DWDM PAM4 up to 80 km.

Read this app note to learn:

• What to look out for when managing chromatic dispersion in PAM4 and multi rate schemes
• How a single tunable dispersion compensator (TDCM) can be used to compensate for every channel of the C-band up to 80 km
• What fiber Bragg grating (FBG) based TDCMs are and what they bring for PAM4 applications