High-temperature 2.5 Gb/s vertical-cavity surface-emitting lasers at 1.55 /spl mu/m wavelength

Buried tunnel junction (BTJ) vertical-cavity surface-emitting lasers (VCSELs) for 1.55 /spl mu/m wavelength were fabricated on InP with significantly improved stationary and dynamic lasing characteristics such as CW output powers >7 mW (at 20/spl deg/C), maximum CW operating temperature >110/spl deg/C, threshold currents and voltages below 1 mA and 0.9 V, respectively, and modulation bandwidths exceeding 2.5 Gb/s.