Abstract
In this paper, turn-on time delay characteristics of a fiber grating Fabry-Perot (FGFP) laser are numerically investigated by considering all the carrier recombination rate (CRR) R ( N ) coefficients (nonradiative, A nr ; radiative, B ; and Auger coefficient, C ). The results show that the turn-on time delay significantly reduces by increasing the injection current ( I inj ) and/or the initial value of carrier density ( N i ) . Meanwhile, the turn-on time delay increases by increasing the CRR coefficients. However, its effect can be minimized by increasing I inj and/or N i . In addition, the turn-on time delay can be reduced by increasing the external optical feedback (OFB) level. Moreover, it is shown that the optimum external-cavity length ( L ext ) is 3.1 cm. Furthermore, an antireflection (AR) coating reflectivity value of 1 10 - 2 is sufficient for the laser to operate at good turn-on time delay and low fabrication complexity. The obtained results can provide an important idea for the practical fabrication of the FGFP laser used in the dense wavelength-division multiplexing (DWDM) systems and optical access networks.