Optical device, optical communication component and optical transmission apparatus

摘要

An optical device, has at least two first optical components; a second optical component placed between the first optical components, or at an intersection point of optical axes to be formed by the first optical components; and a placement member for placing the first optical component and the second optical component, wherein the placement member has at least a groove portion for placing the first optical component, and each portion of the first optical component and each portion of the groove portion have such a shape and size that optical axes to be formed by the first optical components are positioned within the same plane respectively in a state in which the first optical components are all placed on the groove portion.