Stripe-array diode-laser in an off-axis external cavity: theory and experiment.
Stripe-array diode lasers naturally operate in an anti-phase supermode. This produces a sharp double lobe far field at angles +/-alpha depending on the period of the array. In this paper a 40 emitter gain guided stripe-array laterally coupled by off-axis filtered feedback is investigated experimentally and numerically. We predict theoretically and confirm experimentally that at doubled feedback angle 2alpha a stable higher order supermode exists with twice the number of emitters per array period. The theoretical model is based on time domain traveling wave equations for optical fields coupled to the carrier density equation taking into account diffusion of carriers. Feedback from the external reflector is modeled using Fresnel integration.
Jechow
Andreas
A
University of Potsdam, Institute for Physics and Astronomy, Chair of Photonics, Karl-Liebknecht-Str. 24-25, 14476 Potsdam. ajechow@uni-potsdam.de
Lichtner
Mark
M
Menzel
Ralf
R
Radziunas
Mindaugas
M
Skoczowsky
Danilo
D
Vladimirov
Andrei G
AG
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D008962:Models, Theoretical; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity