Manufacturing Apparatus of Optical Circuit and Manufacturing Method of Optical Circuit

An apparatus for manufacturing an optical circuit including a glass film, the apparatus comprising:

• a step of forming a lower cladding film and an apparatus configured to form a core film;
• an apparatus configured to form a core pattern by photolithography;
• and
• an apparatus configured to form an upper cladding film on the core pattern,
• wherein in the step of forming the upper cladding film, refractive index distribution of the upper cladding is adjusted on a basis of measurement data of refractive index distribution in a layer of the optical circuit before the step of forming the upper cladding film.