Fiber Geometry | Nominal Nonlinear Refractive Index n2 [(cm²/W)] |
Erxxx-4/125 | 2.0 • 10.0-16 ... 2.2 • 10.0-16 |
Erxxx-8/125 | 2.4 • 10.0-16 ... 2.5 • 10.0-16 |
*Valid for the wavelength range from 1500 nm – 1600 nm
What is the Erbium ion density of nLIGHT’s Erbium doped fibers?
Taking the overlap of the fundamental mode with the core into account and depending on the fiber type, one can expect the following Erbium ion densities:
Fiber Type | Erbium Ion Density [(m-3)] |
Er16-8/125 | 6.8 • 10.024 |
Er30-4/125 | 2.1 • 10.025 |
Er40-4/125 | 3.5 • 10.025 |
Er80-8/125 | 3.9 • 10.025 |
Er110-4/125 | 8.4 • 10.025 |
*Valid for the wavelength range from 1500 nm – 1600 nm
Do you offer passive fibers matching to your Erbium doped fibers?
We do not offer specially dispersion engineered matching passive fibers for our Erbium doped fibers. Standard telecom fibers are typically compatible with our Erbium products.
What is the background loss at 1300nm of your Erbium doped fibers?
Please contact an nLIGHT fiber representative to obtain the measured background loss at 1300 nm of your fiber. Please provide the fiber code of your fiber with the inquiry.
What is the core diameter and Erbium doping diameter of nLIGHT’s Erbium doped fibers?
The nominal core diameter and Erbium doping diameter are as follows:
Fiber Type | Nominal Core and Erbium Doping Diameter [(m)] |
Erxxx-4/125 | 3.5 |
Erxxx-8/125 | 7.6 |
What is the spontaneous emission lifetime of nLIGHT’s Erbium doped fibers?
The spontaneous emission lifetime can be assumed to be about 9 ms for all our Erbium doped fibers.
What is the fraction of quenched ions (Erbium clustering) of nLIGHT’s Erbium doped fibers?
The fraction of quenched ions (Erbium clustering) is as follows:
Fiber Type | Fraction of quenched ions |
Er30-xxx | 4.80% |
Er40-xxx | 7.0% |
Er80-xxx | 14.0% |
Er110-xxx | 16.0% |
What fiber length do you recommend to use with your Erbium doped fibers?
The optimal length of the fiber depends on the application and ideally should be determined based on simulations taking the exact design into account. An initial estimate can be obtained when assuming a total absorption of 70 dB (600 dB) for C-band (L-band) applications. Accordingly, the fiber lengths are:
Fiber Type | Nominal Absorption at 1530nm [dB/m] | C-Band Application Length [(m)] | L-Band Application Length [(m)] |
Er16-8/125 | 16 | 4.5 | 38 |
Er30-4/125(HC) | 30 | 2.3 | 20 |
Er40-4/125 | 40 | 1.8 | 15 |
Er80-8/125 | 80 | 0.9 | 7.5 |
Er110-4/125 | 110 | 0.6 | 7.5 |