Alcatel Multimode Fiber 50/125 Ref. A1b Process The fibers are manufactured using the APVD process. This is a deposition of Silicium dioxide and germanium dioxide inside a silica tube. The Alcatel APVD has been specifically developed for a mass production of fibers with a high level of reproducibility. The fiber operates at both wavelength regions 850 nm and 1300 nm. They are produced and controlled according to the international standards : IEC pub 793/2 for the product. The multimode 50/125 graded index fiber is widely used for various types of applications: data, transmission, voice-video services. IEC pub 793/1 for the measurement methods. Effective Index of Refraction 1.4820 at 850 nm. 1.4799 at 1300 nm. Fiber Optic Product Line issue : April 1998 1/2 Characteristics Measurement method Conditions Description IEC793/1 Ref. Specified Values Tolerances Unit Cut-back C1A 2.4 - 2.6 - 2.8 max. dB/km 0.5 - 0.7 max. dB/km Backscattering C1C 0.2 max. dB Impulse response C2A 400-600-800 min. MHz. km min. MHz. km Far-field light distribution C6 800-10001200-1500 0.200 0.015 A2 50 3 m Core non-circularity Near-field light distribution " " 6 max. % Cladding diameter " " 125 3 m Cladding non-circularity " " 2 max. % Core/clad. non concentricity " " 6 max. % On line B1 100 min. KPSI 60 typical 23 typical Optical parameters Attenuation @ 850 nm @ 1300 nm Backscattering @ 850 nm local defects Bandwidth (modal dispersion) Impulse width 150ns @ 850 nm @ 1300 nm Numerical aperture Geometrical parameters Core diameter Mechanical parameters Proof test duration 0.5s Weibull parameters B2B Slope TIA fatigue coefficient Delivery lengths 8.8- 7.7 - 6.6 - 5.5 - 4.4 - 3.3 - 2.2 Other lengths available upon request Fibers with different characteristics can be provided upon request. References for product : IEC pub 793/2. km References for measurement : IEC Pub 793-1.1, 1-2, 1-3, 14, 1-5 Multimode Fiber Unit B.P. 147, 53 rue Jean Broutin, 78703 Conflans Cedex - France Tel : + 33 (0) 1 39 19 12 00 - Fax : + 33 (0) 1 39 19 12 12 Fiber Optic Product Line issue : April 1998 2/2