We reported on our recent progress in the design and fabrication of a parallel optical transmitter.The 12-channel parallel optical transmitter with each channel's data rate up to 3 Gbit/s was designed and measured.An 850 nm vertical cavity surface emitting laser(VCSEL) array was adopted as the light source,and the VCSEL chip was directly wire bonded to a 12-channel driver IC.The outputs of the VCSEL array were directly coupled into a 12-channel fiber array.The eye diagram at 3 Gbit/s was achieved with the optical output more than 1 mW at operating current 8 mA.