512-channel vertical-cavity surface-emitting laser based free-space optical link

Abstract

A vertical-cavity surface-emitting laser based bidirectional free-space optical interconnect has been implemented to interconnect two printed circuit boards. A total of 512 clustered channels with a density of 2844 channels/cm2 are transmitted over a distance of 83 mm. The optical interconnect is a combination of refractive microlenses and diffractive minilens relays.

Stacked Polymeric Multimode Waveguide Arrays for Two-Dimensional Optical Interconnects

“…If the variation of the coupling loss due to the positional errors of the stacked waveguides is included, the optical loss uniformities will be increased up to 1.9 and 2.2 dB, respectively. Although the optical uniformities of the stacked waveguide arrays are not as good as other methods such as microlenses ( 1.25 dB) [13] and fiber image guiding ( 1 dB) [14], the stacked waveguide arrays have large potential because the optical uniformities can be reduced by the development of stacking process to reduce the positional errors.…”

Minimising crosstalk in microchannel free-space optical interconnects with the presence of higher order modes

“…Several OI designs based on two dimensional VCSEL arrays have been proposed [8][9][10][11][12][13]. From these studies, it is evident that one of the major factors determining the maximum channel density and bit-error ratio is the optical crosstalk noise within the system.…”

Novel array geometries for free-space optical interconnects with improved signal-to-noise ratio

“…Several OI designs based on two dimensional VCSEL arrays have been proposed [8][9][10][11][12][13]. From these studies, it is evident that one of the major factors that determine the maximum channel density and bit-error ratio is the optical crosstalk noise within the system.…”