Coherence of VCSEL's for holographic interconnects
Date
1995
Authors
Leigenguth, R., author
Feld, S., author
Wilmsen, C., author
Rocca, Jorge J., author
Stanko, P., author
Watson, M. E., author
Benware, B., author
Chilla, J. L. A., author
IEEE, publisher
Journal Title
Journal ISSN
Volume Title
Abstract
Temporal and spatial coherence measurements were conducted on the emission from AlGaAs-GaAs vertical-cavity surface-emitting lasers (VCSEL's). Results of both CW and pulsed conditions from devices of 8- and 15-μm diameter are reported. Coherence length of 0.6 mm for multi-mode and ~75 cm for single-mode were obtained. Thermal chirp reduces the single-mode coherence to 16 mm for 5 ns pulses. For holograms smaller than 0.6 mm in size the density of information that can be read by the VCSEL's is diffraction-limited by the size of the holographic element.