Elect. eng. handbook, 1993: p. 770 (Integrated optics: the monolithic integration of one or more optical guided-wave devices on a common substrate)

Random House, 1987 (Integrated optics: an assembley of miniature optical elements of a size comparable to those used in electronic integrated circuits)

Inspec, viewed August 21, 2015 (in thesaurus under Optics with a subcategory, optical planar waveguides)

Wikipedia, viewed August 21, 2015 (redirected to: Photonic integrated circuit; also an integrated optical circuit; integrated at least two photonic functions, similar to an electronic integrated circuit; information signals imposed on optical wavelengths typically in the visible spectrum or near infrared)