Narrow-Linewidth Discrete-Mode Laser Diodes for Coherent Communication Applications
Lasers with narrow-linewidth emission are a key component for higher-order modulation formats. We report on discrete-mode laser diodes designed for narrow-linewidth emission and demonstrate linewidths less than 80 kHz. Using these devices in quadrature phase shift keying and 16-quadrature amplitude modulation transmission setups, similar performance to that of an external cavity laser is demonstrated.
coherent communications quadrature phase shift keying advanced modulation formats narrow-linewidth lasers quadrature amplitude modulation