Excellent Geometrics Properties Provide Very Low Birefringence and Excellent Splice Characteristics
Core/Cladding Concentricity ≤0.5 µm
Dual Acrylate Coating
Splice Loss to SM Fiber of Pump Laser ≤0.1 dB
Splice Loss to SMF-28 Fiber ≤0.15 dB
Thorlabs offers a wide range of highly doped erbium fibers suitable for fiber lasers and amplifiers operating in the 1530 to 1610 nm wavelength region. These fibers cover broad application field ranging from telecommunication amplifiers (EDFAs) to high power PON/CATV boosters and ultra-short pulse amplifiers used in instrumentation, industrial and medical applications. Large-Mode-Area (LMA) Double Cladding Erbium fibers are also available on request. These highly doped fibers have a core size from 20 to 30 µm with a 125 µm cladding.
Item #
Peak Core Absorption
Cut-off Wavelength
Er16-8/125
16 ± 2 dB/ma
1100 - 1400 nm
Er30-4/125
30 ± 3 dB/ma
800 - 980 nm
Er60-40/140DC
4.6 ± 1 dB/m a,c
NA
Er80-4/125
80 ± 8 dB/ma
800 - 980 nm
Er80-8/125
80 ± 8 dB/ma
1100 - 1400 nm
Er110-4/125
110 ± 10 dB/ma
800 - 980 nm
M5-980-125
4.5 - 5.5 dB/mb
900 - 970 nm
M12-980-125
11 - 13 dB/mb
900 - 970 nm
a) Measured at 1530 nm b) Measured at 980 nm c) This is the Cladding absorption specification
Erbium Doped C- and L-Band Fibers Applications
Erbium doped fiber amplifier technology continues to progress at an astonishing rate with commercial systems now in routine service around the globe. With the ever increasing demand for extra bandwidth the development and deployment of amplifiers operating in the 'L-band' has been rapid and extensive.
MetroGain™ - "A Fiber Optimized For Use In The 'L - Band" To shift the gain curve into the 'L-band' long gain sections have conventionally been required. These could be over 100 meters in length providing both fiber management and cost issues. MetroGain™ has a new core composition with increased erbium concentration. At the pump wavelength of 980nm the absorption is of the order of 12 dB/m. The co-dopants incorporated in the fiber core ensure that with the relatively high levels of rare earth negligible clustering occurs. The result is a high absorption high efficiency erbium doped fiber. The gain profile is intrinsically flat. The NA for this fiber is in the range 0.21 - 0.23. This has been found to give good modal overlap of the pump with the doped region of the fiber whilst still maintaining excellent splice characteristics.
High Power Short 'C-Band' Amplifiers The fiber has been evaluated in an amplifier incorporating a very high power nominally 1480 nm pump source. The pump input into the gain section was in excess of 1.5 W. An output of 28.5 dB/m was achieved with an input comprising four signals loading the amplifier with a total of 11.5 dB/m. The inputs were between 1545 and 1560 nm. The length of gain fiber required to achieve this was less than 5 meters.
Fiber Lasers And ASE Sources. The high absorption of the MetroGain™ makes it an ideal choice for fiber lasers and ASE sources. Very short cavity lengths for fiber lasers can be realized and consequently pulse distortion is minimized.
Stocked Highly Doped Erbium Fibers
Liekki Er16-8/125 is a large mode area (LMA) erbium doped fiber suitable for high power output amplifiers (output power of 25 dBm or more). Good spliceability, excellent power conversion efficiency, and excellent spectral reproducibility and consistency make this fiber the choice for today's high power output amplifiers used for example in CATV and PON applications.
Liekki Er30-4/125 is a highly doped erbium fiber designed for C and L-band amplifiers and ASE sources. This fiber has demonstrated the highest power conversion efficiency available in L-band: better than 50% for a typical fiber length of 20 m.
Liekki Er60-40/140DC is a large mode area (LMA) erbium doped fiber suitable for medium power EDF amplifiers and lasers. These fibers are idelally suited for compact, eye-safe devices. Both 980 and 1480 nm pump diodes may be used for pump sources.
Liekki Er80-4/125 is a very highly doped erbium fiber for fiber lasers and amplifiers. High erbium concentration reduces required application fiber length considerably while providing strong gain and reduced non-linear effects.
Liekki Er80-8/125 is a large mode area single mode erbium doped fiber suitable for high power amplifiers and lasers (output power of 25 dBm or more). Good spliceability, high doping and large core makes this fiber ideal for high peak power pulse amplification in the eye-safe 1.5 μm wavelength region. Fiber can be used also with 980 nm pumps.
Liekki Er110-4/125 is a highly doped erbium fiber for fiber lasers. High erbium concentration reduces required application fiber length while providing strong gain and reduced non-linear effects.
1. L-band EDFAs require 30 - 40 m gain-lengths, depending on precise configuration.
Item #
Mode Field Diameter
Peak Core Absorption
Numerical Aperture
Cut-off Wavelength
Cladding Diameter
Coating Diameter
Er16-8/125
9.5 ± 0.8 μma
16 ± 2 dB/mc
0.13 (Nom)
1100 - 1400 nm
125 ± 2 μm
245 ± 15 μm
Er30-4/125
6.5 ± 0.5 μma
30 ± 3 dB/mc
0.2 (Nom)
800 - 980 nm
125 ± 2 μm
245 ± 15 μm
Er60-40/140DC
NA
4.6 ± 1.0 dB/mc,e
0.09 ± 0.01
NA
140 ± 5 μm
245 ± 15 μm
Er80-4/125
6.5 ± 0.5 μma
80 ± 8 dB/mc
0.2 ± 0.02 (Nom)
800 - 980 nm
125 ± 2 μm
245 ± 15 μm
Er80-8/125
9.5 ± 0.8 μma
80 ± 8 dB/mc
0.13 ± 0.02 (Nom)
1100 - 1400 nm
125 ± 2 μm
245 ± 15 μm
Er110-4/125
6.5 ± 0.5 μma
110 ± 10 dB/mc
0.2 ± 0.02 (Nom)
800 - 980 nm
125 ± 2 μm
245 ± 15 μm
M5-980-125
3.5 μmb,d 5.9 μma
4.5 - 5.5dB/mb
0.22 - 0.24
900 - 970 nm
125 ± 1 μm
245 μm (Nom)
M12-980-125
3.7 μmb,d 6.2 μma
11 - 13 dB/mb
0.21 - 0.23
900 - 970 nm
125 ± 1 μm
245 μm (Nom)
a) Measured at 1550 nm b) Measured at 980 nm c) Measured at 1530 nm
d) 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. e) This is the Cladding absorption.
Absorption Graphs of Highly Doped Erbium Fibers
Below are plots of group delay (GD) as a function of wavelength for three different pump powers for Er30-4/125 and Er80-8/125 Erbium-doped fiber. Group delay is the time required for information in a signal (i.e., any specific point on the modulation waveform) to travel the length of the optical path.
Below are plots of chromatic dispersion (CD) as a function of wavelength for three different pump powers for Er30-4/125 and Er80-8/125 Erbium-doped fiber. Chromatic dispersion is simply the local slope of the group delay versus wavelength graph.
Below are plots of differential group delay (DGD) as a function of wavelength for three different pump powers for Er30-4/125 and Er80-8/125 Erbium-doped fiber. Differential group delay is defined as the maximum group delay variation over all polarization states.
Custom Patch Cable Service with Same Day Shipment
Thorlabs stocks the largest selection of single mode and multimode optical fibers in the photonics industry. Simply use the form below to receive a quote on a custom patch cable. Once filling out the quote request, a member of our Technical Support team will e-mail you a quote with a lead time.
Custom patch cables can be shipped the same day they are ordered provided the following criteria* are met:
Order Does Not Exceed 5 Cables
Each Cable Does Not Exceed 20 m in Length
Order is Placed Before 12:00 pm Eastern Standard Time
*Other restrictions may apply. Not available with PCF or PM fibers.
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Posted Comments:
Poster: jens
Posted Date: 2010-03-29 13:52:50.0
A reply from Jens at Thorlabs to David: we got approximate values for this from the manufacturer as follows
Er6-8/125 , 0.82*10^25 ions/m^3
Er20-4/125, 1.6*10^25 ions/m^3
Er30-4/125, 2.1*10^25 ions/m^3
Er40-4/125, 2.7*10^25 ions/m^3
Er80-4/125, 6.3*10^25 ions/m^3
Er80-8/125, 4.7*10^25 ions/m^3
Er110-4/125,8.7*10^25 ions/m^3
Poster: dmichel
Posted Date: 2010-03-29 04:06:19.0
Hello.
At the university were I am studying, we have purchased some of your Erbium doped fibers and would like to know if you have any information about the concentration level of the Erbium ion, (normally mesuared in ppm).
The list of purcased fibers are:
ER16-8/125
ER20-4/125
ER30-4/125
ER40-4/125
ER80-4/125
ER80-8/125
Thank you.
David
Thorlabs offers a range of passive large-mode-area (LMA) fibers matched with available active LMA fibers such as Liekki's Yb1200 product family. These passive fibers are matched to the core diameters and numerical apertures of their active counterparts to maintain excellent beam quality throughout fiber laser or amplifiersystems. The outer cladding diameter is designed to "round" the shaped active fibers, to achieve low pump coupling loss from passive to active fibers. The passive fibers are coated with low-index fluoroacrylate enabling active fibers to be pumped through them. High index acrylate coated fibers are available by special request; please contact your local technical support office for details.
Item#
Core
Cladding
Coating
Core NA
Cladding NA
Proof Test
P-10/125DC
10 ± 1 μm
125 ± 2 μm
245 ± 15 μm
0.08 ± 0.01
>0.46
>100 kpsi
P-20/390DC
20 ± 2 μm
390 ± 8 μm
500 ± 15 μm
0.07 ± 0.01
>0.46
>50 kpsi
P-25/240DC
25 ± 2.5 μm
240 ± 5 μm
350 ± 15 μm
0.07 ± 0.01
>0.46
>50 kpsi
P-40/140DC
40 ± 4 μm
140 ± 3 μm
245 ± 15 μm
0.09 ± 0.01
>0.46
>100 kpsi
Custom Patch Cable Service with Same Day Shipment
Thorlabs stocks the largest selection of single mode and multimode optical fibers in the photonics industry. Simply use the form below to receive a quote on a custom patch cable. Once filling out the quote request, a member of our Technical Support team will e-mail you a quote with a lead time.
Custom patch cables can be shipped the same day they are ordered provided the following criteria* are met:
Order Does Not Exceed 5 Cables
Each Cable Does Not Exceed 20 m in Length
Order is Placed Before 12:00 pm Eastern Standard Time
*Other restrictions may apply. Not available with PCF or PM fibers.
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ER16-8/125
- Erbium Doped Fiber, 16 dB/m @ 1530 nm, Experimental
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