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Erbium Doped Fiber For DWDM reportIsoGain™

Erbium Doped Fiber for
High Channel-Count DWDM Systems

erbium doped Fiber Gain-flatness that exceeds the state-of-the-art
erbium doped Fiber Broad spectrum ideal for ASE sources

IsoGain™ is the new erbium doped fiber from Fibercore Limited with a core composition developed especially for EDFAs optimised for high channel-count DWDM systems. Head-to-head evaluations performed both at Fibercore's own laboratories and at third-party test-sites have confirmed IsoGain's class-leading performance.



erbium doped Fiber - 32 channel simulation

MetroGain™

Erbium Doped Fiber for
Low-Cost 'Metro' EDFAs

erbium doped Fiber Low cost
erbium doped Fiber High conversion efficiency
erbium doped Fiber Short or ultra-short gain-lengths
erbium doped Fiber MetroGain™ 12 has excellent L-band capabilities
erbium doped Fiber Broad spectrum ideal for ASE sources

Fibercore Limited has used the high-volume manufacturing techniques it has developed for the supply of hundreds of kilometres of PM fiber into the fiber optic gyroscope industry, every month, to introduce MetroGain™ - the most cost-effective erbium doped fiber on the market.

In addition to their low price, MetroGain™ 5 and MetroGain™ 12 deliver excellent performance in 1 - 16 channel systems in terms of both conversion efficiency and noise figure with > 70% (quantum) and < 5 dB achieved routinely in commercially-produced EDFAs. MetroGain™ 5 has a typical gain-length of 8 - 14 metres and overall performance is relatively insensitive to small changes in fiber length - simplifying EDFA manufacture. MetroGain™ 12, on the other hand, not only provides the ultimate in cost-effectiveness, with typical gain-lengths of 4 - 6 metres, but can also be configured to deliver excellent L-band performance1. This exceptionally short gain-length, when combined with the optional 80 µm diameter, makes MetroGain™ 12 perhaps the ultimate 'Metro' fiber.


Notes 1. L-band EDFAs require 30 - 40 m gain-lengths, depending on precise configuration


erbium doped Fiber - Typical emission cross-section

Simulation Software

IsoGain™ and MetroGain™ are supplied complete with a full set of modelling parameters to enable you to both evaluate the products and to optimise your EDFA design without costly experimentation.

These parameters may be used in most of the proprietary software currently available on the market. Alternatively, Fibercore Limited provides powerful and sophisticated simulation software to all of its OEM customers, free of charge, enabling them to analyse a wide range of system configurations and accurately predict EDFA performance.


erbium doped Fiber - Typical absorbtion cross-section
erbium doped Fiber - Typical emission cross-section

SpecificationsRequest More information about: IsoGain and MetroGain erbium doped Fiber
  IsoGain™ MetroGain™
Order Code I-4/980/125 I-6/980/125 M-5/980/125 M-3/1480/125 M-12/980/125 M-12/980/80
Cut-off Wavelength 900 - 970 nm 1300 - 1450 nm 900 - 970 nm
Numerical Aperture 0.22 - 0.24 0.21 - 0.23
Mode-Field Diameter2 3.5 µm (980 nm), 5.9 µm (1550 nm) 5.3 µm (1480 nm), 5.5 µm (1550 nm) 3.7 µm (980 nm), 6.2 µm (1550 nm)
Absorption at Pump Wavelength 3.5 - 4.5 dB/m (980 nm) 4.5 - 5.5 dB/m (980 nm) 4.5 - 5.5 dB/m (980 nm) 2.8 - 3.8 dB/m (1480 nm) 11 - 13 dB/m (980 nm)
Proof-Test 1% or 2% (100 kpsi or 200 kpsi)
Background Loss5 < 10 dB/km < 20 dB/km
Fiber Diameter 125 ± 1 µm 80 ± 1 µm
Core Cladding Concentricity < 0.5 µm
Coating Diameter 245 µm (nominal) 170 µm (nominal)
Coating Type Dual Acrylate
Polarization Mode Dispersion < 0.005ps/m
2. The Mode Field Diameter is a nominal, calculated value, estimated at the operating wavelength(s) using typical value of numerical aperture and cut-off wavelength.
5. Background loss is quoted at a minimum point of the spectrum (typically 1100 nm to 1200 nm for the DF1500 series)
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Ordering Information: IsoGain™ and MetroGain™

To order any of the IsoGain™ or MetroGain™ fibers, simply specify the product code and the length you need for your application.



Fibercore Limited's erbium doped fiber products, have been designed to meet every need. Er doped fibers for Metro type EDFAs and High Channel count DWDM systems are available, including 80 micron reduced clad versions and erbium doped polarization maintaining fiber versions. The highly doped MetroGain M12, is also highly suited in Fiber Laser applications as well as an amplifier fiber.

erbium doped Fiber
Fibercore Limited, Fibercore House, University Parkway, Chilworth Science Park, Southampton, Hampshire, SO16 7QQ, United Kingdom
Tel: +44 (0)23 8076 9893 | Fax: +44 (0)23 8076 9895 | Email: info@fibercore.com