19 element 2D honeycomb VCSEL array
An electrically parallel, optically uncoupled, 19 element 980 nm top surface emitting vertical cavity surface emitting laser (VCSEL) array with inter VCSEL metal and top mesa ridge connectors, processed using a two dimensional honeycomb lattice basis with oxide aperture diameters of ph ~10.5 m per VCSEL exhibits a record combination of continuous wave optical output power (150 mW) 3 dB small signal modulation bandwidth (17 GHz) and wall plug efficiency (30% at a conservative operating bias current density of 10 kA/cm2. To demonstrate the potential of the VCSEL array as an optical source for future fifth generation free space optical communication systems we perform a data transmission test at 25 Gb/s across OM1 multiple mode optical fiber using simple 2 level pulse amplitude modulation and pseudorandom binary patterns of word length 27 1. We achieve a bit rate of 25 Gb/s with a bit error ratio below 1 x 10 12.
OPTO