Fast, discretely tunable distributed Bragg reflector (DBR) lasers are used in all-optical wavelength-division multiplexing (WDM) networks for time-sharing wavelengths among many users.~(1,2) This is accomplished by hopping between frequencies in a time-division multiplexing (TDM) pattern. It has been observed that the frequency alignment of the DBR laser is sensitive to the TDM hopping pattern, which can lead to significant system frequency errors. In this work, we show that using thermal compensation can substantially reduce these frequency errors.
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