The entry of coherent DSPs capable of delivering wavelength speeds over one terabit-per-second is expected to drive the market growth for the next five years.

“We are projecting the new generation of coherent DSPs that are capable of terabit speeds will grow at an accelerated pace over the next five years,” says Dell’Oro vp Jimmy Yu, “by 2028, we expect over half of the DWDM market revenue will be derived from shipments of 1.2 Tbps and 1.6 Tbps-capable line cards. These new line cards will bring 400 Gbps wavelength into ultra-long-haul applications that cross thousands of kilometers, and 800 Gbps wavelengths everywhere else.”