Monolithic inp-based coherent transmitter photonic integrated circuit with 2.25 Tbit/s capacity

A monolithic dual-polarisation quadrature phase shift keying transmitter is demonstrated for operation at 2.25 Tbit/s over 40 wavelengths and 1 THz of spectral bandwidth. The single-chip InP-based transmitter employs 40 tunable distributed feedback lasers, 80 nested Mach-Zehnder modulators and other elements to provide more than 1700 integrated photonic functions.