For the first time a vertical-cavity surface-emitting laser (VCSEL) with a single-mode wavelength-tuning over 102nm in the range of 1550nm is demonstrated. The fiber-coupled optical output power has a maximum of 3:5mW and is > 2mW over the entire tuning range. The sidemode suppression ratios are > 45dB. The wavelength tuning is achieved with the micro-electro mechanical actuation of a mirror membrane fabricated with surface micro-machining for on-wafer mass production. The mirror membrane consists of low cost dielectric materials (SiOx/SiNy) deposited with low temperature (< 100°C) Plasma Enhanced Chemical Vapor Deposition (PECVD).