Optical engine for data communication

An optical engine for data communication includes a substrate, an array of optical semiconductor devices mounted on the substrate, a device lens block mounted on the substrate and formed with a cavity for accommodating the array of optical semiconductor devices, a jumper lens block coupled with the device lens block at an upper surface thereof, and a fiber array mounted on the jumper lens block and optically coupled with the array of optical semiconductor devices. The jumper lens block is aligned with the device lens block by alignment posts and notches. A metal latch is used to hold the jumper lens block on the device lens block.