GaAs subst rate has been developed and an MOCVD-grown multiple-wavelength
VCSEL array was demonstrated based on this technique [53]. Several reports on
multiple-wavelength VCSELs emitting at 850 and 980 nm have been presented
[54–56]. Ultrahigh capacity chip-to -chip optical interconnect based on WDM
VCSEL technologies has been developed in the Terabus project [57]. The data
rate is up to 20 Gb/s with 48 channels (4 wavelengths 12 parallel channels),
leading to a bit rate approaching 1 Tb/s.
Microelectromechanical system (MEMS)-based tunable filters and tunable
VCSELs [58–62] are attracting much interest because of their unique features, such
as wide continuous tuning, polarization-insensitive operation, and 2D array integra-
tion. Wide continuous ...