We propose a double contact Fabry–Pérot laser diode
(F-P LD) as a temperature-independent wavelength-divisionmultiplexing
source. By controlling injection currents of the double
contact F-P LD, we achieve a fixed lasing envelope regardless of
temperature variation. We also demonstrate error-free transmission
using the double contact F-P LD as a wavelength-locking
source within a 20 C operating temperature range.