Prysmian Group Netherlands: Tel: +31 (0)402958700
fibresales@prysmiangroup.com France: Tel: +33 (0)321794900
http://fibre.prysmiangroup.com USA: Tel: +1 828-495-8611
DrakaElite Specialty Fibre
Super RadHard
50/125 µm GI-MMF
0
0,5
1
1,5
2
2,5
3
-500 0 500 1000 1500 2000
Dose (kGy)
RIA at 1300nm (dB/100m)
Prysmian Group has developed a revolutionary new product as part of its DrakaElite
TM
specialty radiation hardened
(RadHard) fibres portfolio. This 50µm core diameter Super RadHard multimode fibre (MMF) shows extremely low
sensitivity for radiation effects in irradiative environments (e.g. gamma rays, X-flash, neutrons protons) while
simultaneously offering high bandwidth.
By combining the excellent performance of the proprietary deposition process (PCVD) with a full Fluorine-doped
design, the Radiation Induced Attenuation (RIA) response of this DrakaElite
TM
Super RadHard MMF is significantly
improved.
It allows much more tolerance than standard MIL-PRF-49291 approved Germanium-doped 50µm core diameter MMF
particularly for dose levels exposure above 10 kGy. In addition, this Super RadHard MMF exhibits a faster recovery
time as compared to standard RadHard MMFs. The benefit of this Fluorine-doped Super RadHard MMF compared to
the standard Germanium-doped RadHard MMF increases with the total dose, for example by a factor 20 at 1300nm for
a cumulated dose of 10kGy. (Note: 1 Gy = 100 Rad).
Because Radiation Induced Attenuation (RIA) is a strong function of time after dose, dose rate, temperature, system
operational wavelength, and system operational power, assessing the RIA performance of different fibres should be
conducted as close to conditions in the final application as possible.
The DrakaElite
TM
Fluorine-doped Super RadHard MMF can be used in all cable constructions, including loose tube,
tight buffered, ribbon and central tube designs. This fibre complies with or exceeds IEC 60793-2-10 type A1a.1 Optical
Fibre Specification, with exception of the Zero-Dispersion wavelength, which is much lower than for regular
Germanium-doped GI-MMFs, resulting in strongly reduced chromatic dispersion at 850nm.
Super RadHard 50/125 µm Multimode Optical Fibre
Most radiation insensitive, high bandwidth GI-multimode fibre available in the market
Product Type:
Super RadHard 50 / 125 / 242 µm GI-Multimode Fibre (SRH-MMF)
Issue date: 04-2013
Coating Type: Dual Layer Primary Coating (DLPC9) Supersedes: 05-2012
Example of RIA for Draka SRH-MMF
at 1300 nm under dose
rate of 1.25 Gy/s up to 2 MGy at 45 C
Features Advantages
Super RadHard behaviour
• Optimized for use in highly irradiative environments
• Strongly improved performance compared to regular
Germanium-doped fibres
Coated with the dual layer UV Acrylate
• Optimized performance in tight-buffer cable
applications
• High resistance to micro-bending
Prysmian Group Netherlands: Tel: +31 (0)402958700
fibresales@prysmiangroup.com France: Tel: +33 (0)321794900
http://fibre.prysmiangroup.com USA: Tel: +1 828-495-8611
DrakaElite Specialty Fibre
Super RadHard
50/125 µm GI-MMF
Characteristics Conditions Specified Values Units
OPTICAL SPECIFICATIONS (Uncabled fibre)
Attenuation Coefficient
850 nm
1300 nm
≤
≤≤
≤ 2.5 (Typical ≤ 2.2)
≤
≤≤
≤ 0.5
dB/km
Overfilled Modal Bandwidth (min.)
1
850 nm
1300 nm
500
2
500
2
MHz.km
Numerical Aperture
0.200 0.015
Chromatic Dispersion
Zero Dispersion Wavelength, λ
0
typical 1275 nm
Zero Dispersion Slope, S
0
≤ 0.105 ps/nm
2
.km
Bending Loss 100 turns at R=37.5 mm; 850 nm, 1300 nm
≤
≤≤
≤ 0.5
dB
Backscatter Characteristics
3
Point Discontinuity
4
850 nm, 1300 nm
≤
≤≤
≤ 0.1
dB
Irregularities over fibre length 850 nm, 1300 nm
≤
≤≤
≤ 0.1
dB
Reflections Not allowed
Group Index of Refraction (Typ.)
850 nm
1300 nm
1.472
1.466
GEOMERICAL SPECIFICATIONS
Core Diameter
50 ±
±±
± 2.5
µm
Core Non-Circularity
≤
≤≤
≤ 6
%
Core/Cladding Concentricity Error
≤
≤≤
≤ 1.5
µm
Cladding Diameter
125.0 ±
±±
± 1.0
µm
Cladding Non-Circularity
≤
≤≤
≤ 1
%
Coating Diameter
242 ±
±±
± 5
µm
Coating Non-Circularity
≤
≤≤
≤ 5
%
Coating/Cladding Concentricity Error
≤
≤≤
≤ 12.5
µm
Length Standard lengths Multiples of 2.2 km
MECHANICAL SPECIFICATIONS
Proof Test Off line
>
>>
> 0.7 (100)
GPa (kpsi)
Dynamic Tensile Strength
(median value)
0.5 meter gauge length, unaged and aged
5
>
>>
> 3.8 (550)
GPa (kpsi)
Fatigue Parameter (Typical) Dynamic fatigue, unaged and aged
5
n
d
> 18
Coating Strip Force Average strip force, unaged and aged
6
1 to 3 N
Peak strip force, unaged and aged
6
1.3 to 8.9 N
ENVIRONMENTAL SPECIFICATIONS
Temperature Cycling
850 nm, 1300 nm; -60 C to +85 C
≤
≤≤
≤ 0.2
dB/km
Temperature-Humidity Cycling
850 nm, 1300 nm; -10 C to +85 C, 4-98% RH
≤
≤≤
≤ 0.2
dB/km
Water Immersion
850 nm, 1300 nm; 23 C, 30 days
≤
≤≤
≤ 0.2
dB/km
Dry Heat
850 nm, 1300 nm; 85 C, 30 days
≤
≤≤
≤ 0.2
dB/km
Damp Heat
850 nm, 1300 nm; 85 C; 85% RH, 30 days
≤
≤≤
≤ 0.2
dB/km
TYPICAL RADIATION INDUCED ATTENUATION (RIA)
Radiation Induced Attenuation
dose=2 MGy / dose rate =1.25 Gy/s
1300 nm / ~45 C
~2.2 dB/100m
Super RadHard 50/125 µm Multimode Optical Fibre
Most radiation insensitive, high bandwidth GI-multimode fibre available in the market
Product Type:
Super RadHard 50 / 125 / 242 µm GI-Multimode Fibre (SRH-MMF)
Issue date: 04-2013
Coating Type: Dual Layer Primary Coating (DLPC9) Supersedes: 05-2012
1). The modal bandwidth is linearly normalized to 1 km, according to IEC 60793-2-10.
2). Higher modal bandwidth values (e.g. 1000/1000 MHz.km) are under development.
3). OTDR measurement with 0.5 µs pulse width.
4). Mean of bi-directional measurement.
5). Aging at 85 C, 85% RH, 30 days.
6). Aging: 23 C, 0 C and 45 C;
30 days at 85 C and 85% RH;
14 days water immersion at 23 C.