Optical fiber array capable of alignment and alignment method thereof

An optical fiber array capable of alignment adapted for a silicon photonics wafer testing system, wherein the silicon photonics wafer testing system comprises a wafer prober and an optical coupling actuator, the optical fiber array is loaded on the optical coupling actuator, the optical coupling actuator is disposed on the wafer prober, a silicon photonics wafer is loaded on the wafer prober, the optical fiber array is aligned through the wafer prober, so that the aligned optical fiber array reaches a state of being able to optically couple with a coupler of the silicon photonics wafer, and the optical fiber array comprises:

• a plurality of fiber optics;
• a base having a first endface and a plurality of grooves parallel to each other, wherein the fiber optics are disposed in the grooves, and one lateral opening of each of the grooves is located on the first endface;
• a lid stacked on the base, and covering the grooves and portions of the fiber optics in the grooves to expose the lateral openings, wherein the lid has a second endface, the first endface of the base, light emitting/receiving surfaces of the fiber optics, and the second endface of the lid are located on same plane;
• and
• a plurality of marks respectively disposed on the first endface and the second endface, wherein on the plane, the marks are located outside a range where the fiber optics are located.