42 SCIENTIFIC RESEARCH, PHYSICS RESEARCH, FIBER-OPTIC ENGINEERING RESEARCH, RESEARCH AND DEVELOPMENT SERVICES FOR OTHERS, ALL OF THE AFORESAID SERVICES RELATING TO OPTICAL APPARATUS, INSTRUMENTS AND DEVICES, OPTICAL APPARATUS, INSTRUMENTS AND DEVICES FOR MEASURING, INTERROGATING AND PROCESSING OPTICAL SIGNALS, FIBER-OPTIC DEVICES AND COMPONENTS, DEVICES INCORPORATING FIBER-OPTIC GRATINGS, OPTICAL WAVEGUIDE DEVICES, INSTRUMENTATION AND MEASUREMENT TECHNOLOGY AND TELECOMMUNICATIONS TECHNIQUES.