We have designed and fabricated single mode proton-implanted photonic crystal vertical-cavity surface-emitting lasers and subsequently performed DC and small signal modulation analysis. Impedance characteristics and electrical parasitics are studied for various photonic crystal designs to understand factors which limit high speed modulation. Photonic crystal designs are found to have low differential resistance, but high parasitic capacitance. By including a diffusion capacitance term in the modulation response equation, scattering parameter fitting suggests the diffusion capacitance to be the limiting factor of intensity modulation. Extracted parameters from DC, impedance, and modulation response measurements are cross-checked to verify accuracy.
We show a novel design and operation technique for an array of optically coupled vertical cavity surface emitting lasers
enabling high-performance optical transmission. Bandwidths up to 37 GHz have been obtained under single-mode operation with narrow spectral width and increased output power while the laser array is biased at low current density. Using dynamic coupled mode theory analysis we determine important design parameters to engineer for greater enhancement of modulation response.
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