An electrical-optical coupling device. An apparatus according to an
embodiment of the present invention includes a first trench defined in a
first semiconductor substrate. A first reflector is defined at a first
end of the first trench in the first semiconductor substrate. The first
reflector is angled with respect to an axis of the first trench. A first
optical fiber is disposed in the first trench at a second end of the
first trench. An optical source is mounted to the first semiconductor
substrate proximate to the first trench. The optical source is optically
coupled to the first optical fiber via the first reflector.