Alcatel Multimode
Fiber 50/125
Ref. A1b
Fiber Optic Product Line issue : April 1998 1/2
The multimode 50/125 graded
index fiber is widely used for various types of applications: data,
transmission, voice-video services.
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.
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 2/2
Characteristics Measurement method IEC793/1 Specified Tolerances Unit
Conditions Description Ref. Values
Optical parameters
Attenuation @ 850 nm Cut-back C1A 2.4 - 2.6 - 2.8 max. dB/km
@ 1300 nm 0.5 - 0.7 max. dB/km
Backscattering @ 850 nm Backscattering C1C 0.2 max. dB
local defects Impulse width
≤150ns
Bandwidth (modal dispersion) @ 850 nm Impulse
response C2A 400-600-800 min. MHz. km
@ 1300 nm 800-1000-
1200-1500 min. MHz. km
Numerical aperture Far-field light
distribution C6 0.200 ± 0.015
Geometrical parameters
Core diameter Near-field light
distribution A2 50 ± 3 µm
Core non-circularity " " 6max. %
Cladding diameter " " 125 ± 3 µm
Cladding non-circularity " " 2max. %
Core/clad. non concentricity " " 6max. %
Mechanical parameters
Proof test duration 0.5s On line B1 100 min. KPSI
Weibull parameters B2B
Slope TIA 60 typical
fatigue coefficient 23 typical
Delivery lengths
km
Fibers with different
characteristics can be provided
upon request.
References for product : IEC
pub 793/2. References for measurement :
IEC Pub 793-1.1, 1-2, 1-3, 1-
4, 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
8.8- 7.7 - 6.6 - 5.5 - 4.4 - 3.3 - 2.2
Other lengths available upon request
