Direct core monitoring technique for passive optical alignment between multichannel silicon waveguide and single-mode fiber array

We propose a passive optical alignment method between multichannel silicon waveguides with spot size converters and a single-mode fiber array. In this method, highly accurate positional and angular alignment is realized by a novel monitoring technique of the waveguide and the fiber in one field of view. We achieve a simultaneous accurate multichannel coupling using a developed assembly system.