Feedback enhancement in lasers with organic gain material
Rik Harbers, Patric Strasser, et al.
Microtechnologies for the New Millennium 2005
Static and dynamic measurements are performed with GaAs oxide-confined vertical-cavity surface-emitting lasers (VCSELs), using multimode fibers with a core diameter of 50 and 62.5 μm and different numerical apertures (NAs). They show that a small NA can have a severe impact on the eye opening and thus also on the bit-error rate. The measurements are analyzed with a spatiotemporal two-dimensional (2-D) multimode VCSEL model. The required parameter extraction for the model is verified with small- and large-signal measurements. The analysis shows that the change of the eye opening can be explained by the interaction between the mode- and the current-injection profile, carrier diffusion, and intermodal gain compression (IGC). IGC increases differences in the modal power distribution caused by the interaction between the mode profiles and the current-injection profile. Carrier diffusion is able to compensate these increased differences of the modal power distribution. Its impact, however, on dynamic changes caused by IGC is moderate. © 2005 IEEE.
Rik Harbers, Patric Strasser, et al.
Microtechnologies for the New Millennium 2005
Thomas Morf, Christian Menolfi, et al.
CSICS 2005
Rik Harbers, Nikolaj Moll, et al.
Journal of the Optical Society of America A: Optics and Image Science, and Vision
Rik Harbers, John A. Hoffnagle, et al.
Applied Physics Letters