Phase-locked laser diode array with two emitters facing an external cavity

The rate equations have been used to study the laser diode array (LDA) positioned in an external cavity. The steady state of phase-locked LDA with two emitters has been analyzed. Analytical solutions to the steady state and the range of the frequency detuning have been deduced. The relations of the photon density, carrier density and frequency detuning have been studied. Finally, the affection of the reflectivity of the external mirror on the photon density has been investigated.