Considerations on the rate equation description of a twin stripe laser array

Theoretical studies of twin stripe laser arrays have shown an enhanced modulation bandwidth over that achieved with single stripe devices. However, experimental data from the devices has concentrated mainly on the device spatio-temporal dynamics, by observation of the near- and far-fields. To our knowledge, only few experiments have been conducted to extract modeling parameters to feed the simulation with approximate values of its parameters. In this paper, based on our own experimental data from a twin stripe array, we clarify the role of the real and imaginary parts of the coupling constant. In the present paper we present procedures to evaluate their sign and modulus.