Virtual Journal of Laser

Publication year: 2010
Source: Optics Communications, In Press, Uncorrected Proof, Available online 6 February 2010
O., Boukari , L., Hassine , H., Bouchriha , M., Ketata
A description of the chirp induced by direct modulated DFB laser is presented. Two approaches are considered: the first one is based on a resolution of laser rate equations; the second, on a simulation with a commercial software. We compare results of the two approaches, we demonstrate that the optical frequency can be controlled via the injected current. We also characterize the linear variation of the optical frequency in time (for triangular and sawtooth modulation), in order to choose the appropriate values of laser and modulation parameters for a perfect linearity of the chirp in time. This study will be...