Modulation characteristics and harmonic distortion of VCSEL arrays and multi transverse mode VCSELs

In conclusion, a simple-to-fabricate single mode VCSEL yields high bandwidth modulation. Large area multi mode devices which are the best choice for optical interconnection, exhibited a “flattened” frequency response resulting from higher transverse modes operation - which is better for digital modulation. Devices lasing at few lower order modes produced mode beating, which resulted in a non-uniform frequency response, and a lower effective bandwidth. Detailed modulation results for both single and multi supermodecoherent arrays are and will be presented and analyzed