Characterization of turn-on time delay in a fiber grating fabry–perot lasers

• Main Authors: Hisham, H.K., Mahdiraji, G.A., Abas, A.F., Mahdi, M.A., Adikan, Faisal Rafiq Mahamd
• Format: Article
• Language: English
• Published: Institute of Electrical and Electronics Engineers (IEEE) 2012
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.um.edu.my/10133/1/00012149_84338.pdf; http://eprints.um.edu.my/10133/

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, Anr ; radiative, B; and Auger coefficient, C). The results show that the turn-on time delay significantly reduces by increasing the injection current (linj) and/or the initial value of carrier density (N). Meanwhile, the turn-on time delay increases by increasing the CRR coefficients. However, its effect can be minimized by increasing Iinj and/or Ni . 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 (Lext) is 3.1 cm. Furthermore, an antireflection (AR) coating reflectivity value of 1 x 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.