Optical module

An optical module, comprising:

• a first optical component including a single first core;
• a second optical component including multiple second cores optically coupled to the single first core by adiabatic coupling;
• and
• a separator separating the single first core from the multiple second cores in a first direction, wherein
• the first optical component is a separate component from the second optical component,
• the single first core and the multiple single second cores are arranged to allow optical coupling from the single first core to the multiple second cores,
• the multiple second cores are arranged side by side in a second direction that is orthogonal to the first direction,
• the single first core overlaps the multiple second cores in an overlapping region in a third direction that is orthogonal to both the first direction and the second direction, and
• a first separation distance between two adjacent ones of the multiple second cores in the second direction is greater than or equal to a second separation distance between the single first core and the multiple second cores in the first direction.