Low-Parasitics 1.55 µm VCSELs with Modulation Bandwidths beyond 17 GHz

We present 1.55 μm BTJ Short-Cavity VCSELs with modulation bandwidths in excess of 17 GHz. As shown by impedance measurements and impedance modeling, this excellent performance can be attributed to an improved parasitic roll-off frequency of 23 GHz.