The present disclosure relates to a device for modulating light emitted by
a laser, including an optical substrate that has an electro-optical
effect, at least one optical waveguide formed near a front face of the
optical substrate, a first electrode that is formed with a conductive
transparent film so that a part of the optical waveguide may be covered
and is used for applying an electric field to the optical waveguide, a
second electrode that is paired with the first electrode and is used for
applying an electric field to the optical waveguide, and a third electrode
that is formed with a metal film in a position that is shifted from a
position just above the optical waveguide and is electrically connected
with the first electrode.
