Highly Doped Ytterbium Fibers

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Highly Doped Ytterbium Fibers

Thorlabs offers state-of-the-art ytterbium doped optical fibers for optical amplifiers, ASE light sources, and high-power pulsed and CW fiber laser applications. Neodymium doped fibers are available for custom orders. These fibers, manufactured by Liekki Ltd. in Finland, are fabricated using the latest doped fiber production technology – Liekki Direct Nanoparticle Deposition (DND). Applications in the fast growing fiber laser and high-power amplifier segments require short fiber lengths, flat refractive index profiles without core burnout, and large core-to-cladding ratio (large mode area double clad fibers). Liekki DND technology was designed with the requirements of these advanced fiber applications in mind.

Available Ytterbium Doped Fibers

The YB1200 family of highly doped ytterbium fibers is designed for fiber amplifiers, continuous wave (CW) and pulsed fiber lasers from mW to over 100W output power levels, operating in the 1µm wavelength region. These fibers, fabricated using Liekki Direct Nanoparticle Deposition (DND) technology, make it possible to reduce the required fiber lengths and to reduce nonlinear effects.

Item #	Absorption @ 920 nm	Core Diameter	Cladding Diameter	Coating Diameter
YB1200-4/125	280 ± 50 dB/m	4.0 ± 0.4 μm	125 ± 2 μm	245 ± 15 μm
YB1200-6/125DC	0.6 ± 0.2 dB/m	5.5 ± 0.5 μm	125 ± 2 μm	245 ± 15 μm
YB1200-10/125DC	1.8 ± 0.4 dB/m	10 ± 1 μm	125 ± 2 μm	245 ± 15 μm
YB1200-20/400DC	0.7 ± 0.2 dB/m	20 ± 2 μm	400 ± 15 μm	500 ± 15 μm
YB1200-25/250DC	2.5 ± 0.7 dB/m	25 ± 2.5 μm	250 ± 15 μm	350 ± 15 μm
YB2000-10/125DC	2.0 ± 0.4 dB/m	10 ± 1.0 μm	125 ± 2 μm	245 ± 15 μm

Production Notes

Liekki has stopped production of the following fibers due to concerns about photo darkening. However, they plan to reintroduce this fiber in the near future. According to the manufacturer there is a 1:1 relation to the amount of fiber required for the alternative fibers listed in the table below.

Item #	Alternative Item #
YB2000-4/125	YB1200-4/125
YB2000-6/125DC	YB1200-10/125DC

Liekki YB1200-4/125 is a highly doped ytterbium fiber for low noise, low nonlinearity preamplifiers and lasers. Its telecom like geometry makes the fiber compatible with low cost pump diodes and standard single mode passive fibers.

Liekki YB1200-6/125DC is a highly doped, single mode, double-clad fiber for medium-power fiber laser and amplifier applications. The fiber is compatible with many fiber-based components such as gratings and combiners.

Liekki YB1200-10/125DC is a highly doped, double-clad fiber for medium to high-power fiber laser and amplifier applications. The combination of high cladding absorption and a single mode core make the fiber ideal for compact fiber-based power amplifiers.

Liekki YB1200-20/400DC is a highly doped, double-clad fiber for high-power fiber lasers and amplifiers. The fiber combines a large core with excellent beam quality and a 400 μm cladding that is compatible with industry standard high-power pump lasers and delivery fibers.

Liekki YB1200-25/250DC is a highly doped, double-clad fiber featuring very high cladding absorption, high efficiency per application length, and excellent beam quality. The fiber is ideal for high average power pulsed fiber amplifiers.

Liekki YB2000-10/125 DC is a highly doped, photodarkening-resistant fiber suitable for low-power laser or amplifier applications.

Single Mode Core Pumped Fiber

Item#	YB1200-4/125
MFD	4.4 ± 0.8 μm
Peak Core Abs @ 976 nm (Nominal)	1200 dB/m
Core Abs @ 920 nm	280 ± 50 dB/m
Core NA (Nominal)	0.2
Cladding NA	>0.46
Cutoff Wavelength	1010 ± 70 nm
Cladding Dia.	125 ± 2 μm
Cladding Geometry	Round
Coating Diameter	245 ± 15 μm
Coating Material	High Index Acrylate
Core Diameter	−
Core Concentricity Error	<0.7 μm
Proof Test	>100 kpsi

Double Cladding SM and MM Fibers

Item #	YB1200-6/125DC	YB1200-10/125DC	YB1200-25/250DC
MFD	6.0 ± 0.8 μm	−	−
Peak Cladding Abs @ 976 nm	2.6 dB/m Nom	6.5 dB/m Nom	10.8 dB/m Nom
Cladding Abs @ 920 nm	0.6 ± 0.2 dB/m	1.8 ± 0.4 dB/m	2.5 ± 0.7 dB/m
Core NA	0.15 ± 0.01	0.08 ± 0.01	0.07 ± 0.01
Cladding NA	>0.46	>0.46	>0.46
Cutoff Wavelength	n/a	n/a	n/a
Cladding Diameter*	125 ± 2 μm	125 ± 2 μm	250 ± 15 μm
Cladding Geometry	Octagonal	Octagonal	Octagonal
Coating Dia.	245 ± 15 μm	245 ± 15 μm	350 ± 15 μm
Coating Material	Low Index Acrylate	Low Index Acrylate	Low Index Acrylate
Core Diameter	5.5 ± 0.5 μm	10 ± 1 μm	25 ± 2.5 μm
Core Concentricity Error	<1.0 μm	<1.5 μm	<1.5 μm
Proof Test	>100 kpsi	>100 kpsi	>100 kpsi

*Flat to flat

Item#	YB1200-20/400DC	YB2000-10/125DC
MFD	−	−
Peak Cladding Abs @ 976 nm	3.0 dB/m	−
Cladding Abs @ 920 nm	0.7 ± 0.2 dB/m	2.0 ± 0.4 dB/m
Core NA	0.07 ± 0.01	0.12 ± 0.02
Cladding NA	>0.46	>0.46
Cutoff Wavelength	n/a	n/a
Cladding Diameter*	400 ± 15 μm	125 ± 2 μm
Cladding Geometry	Octagonal	Octagonal
Coating Dia.	500 ± 15 μm	245 ± 15 μm
Coating Material	Low Index Acrylate	Low Index Acrylate
Core Diameter	20 ± 2 μm	10 ± 1.0 μm
Core Concentricity Error	<1.5 μm	<1.5 μm
Proof Test	>50 kpsi	>100 kpsi

* Flat to flat

Splices / Termination

Yb-Doped PM Fiber

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Posted Comments:

Poster: c.farrell

Posted Date: 2013-04-10 03:56:39.553

Although the YB1200-6/125 is a double-clad fibre for cladding pumping, can it be used in a core-pumped laser. We are looking for a core-pumped Yb fibre with a slightly larger core area than the YB1200-4-125. The YB1200 name suggests the Yb ion concentration is the same. Is this correct and are all the Yb ions added to the core region as in the YB1200-4/125? Thanks, C.

Poster: tcohen

Posted Date: 2013-04-26 13:54:00.0

Response from Tim at Thorlabs: The core is Yb doped and the cladding is Er doped. If you were to use it in a core-pumped laser, please note that the dopant concentration is not the same in the core for the two fibers. I will contact you to discuss this further.

Poster: apalmentieri

Posted Date: 2010-01-27 15:12:13.0

A response from Adam at Thorlabs to tswang: I am currently looking over your request, but would like to know the exact fiber you are looking at. If this is more of a general question, some of this information can be found on our website under the specifications tab and the other information will be provided once we know the exact fiber you are considering. I will email you directly to get more information.

Poster: tswang

Posted Date: 2010-01-27 14:04:56.0

Dear OFS, I am a PhD student at CREOL of UCF woring in Fiber Optics Lab. My current project is on the Solar energy utilizing at this point. At first, an active fiber would be my ideal candidate, for example Nd3+_doped fiber. Please tell me the following parameters on this type of Nd3+-doped fibe: (1)geometries, such as d_core/d_cladding (2)optical properties, such as OD/neff_core/neff_cladd/NA/V-number/MFD (3)doping concentration/level (4)absorption values(for example, White-light/Sunlight of 400nm~1800nm) (5)price/meter Actually, any information are more than welcome with details As much As possible. Best regards Tian ================== Tiansi Wang Graduate Research Assistant Fiber Optics Lab College of Optics and Photonics: CREOL & FPCE University of Central Florida

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YB1200-4/125

Ytterbium Doped Fiber, 976nm, 4 µm Core Diameter

$98.00
Per Meter
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YB1200-6/125DC

Highly Doped Yb Double Cladding Fiber, 6 µm MFD

$90.00
Per Meter
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YB1200-10/125DC

Ytterbium-Doped Fiber, 976 nm, 10 µm Core Diameter

$165.00
Per Meter
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YB1200-20/400DC

Ytterbium-Doped Fiber, 976 nm, 20 µm Core Diameter

$254.00
Per Meter
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YB1200-25/250DC

Highly-Doped Yb Double Cladding Fiber, 25 µm Core Diameter

$345.00
Per Meter
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YB2000-10/125DC

Ytterbium-Doped Fiber, 920 nm, 10 µm Core Diameter

$288.00
Per Meter
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Large Mode Area Passive Fibers

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Fiber Compatibility

Passive Fiber	Active Fiber
P-10/125DC	YB1200-10/125DC
P-20/390DC	YB1200-20/400DC
P-40/140DC	YB1200-25/250DC

Features

Optimized for Coupling to Active Doped Fibers
Core and Cladding Ranges from 10 to 40 μm and 125 to 390 μm, Respectively
Core and Cladding NA of 0.07 to 0.09 and >0.46, Respectively

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 amplifier systems. 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.

Passive Fiber Specs

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-40/140DC	40 ± 4 μm	140 ± 3 μm	245 ± 15 μm	0.09 ± 0.01	>0.46	>100 kpsi

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Posted Comments:

Poster: bdada

Posted Date: 2011-08-23 10:47:00.0

Response from Buki at Thorlabs: Thank you for your feedback. We have an obsolete fiber in stock, P-10/123DC-PM, that is similar to the P-10/125DC-PM you requested. The only difference is the cladding size is 123um instead of 125um. Please review the specification sheet on the right side of the product page linked below for the P-10/123DC-PM and contact TechSupport@thorlabs.com if you have any questions. http://www.thorlabs.com/thorProduct.cfm?partNumber=P-10/123DC-PM&pn=P-10/123DC-PM#2017

Poster: bmills

Posted Date: 2011-08-20 00:50:47.0

Im looking for the PM version of the Liekki passive fibers but cant find them on the website. I need 2 Meters of passive 10/125DC-PM.

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P-10/125DC

Passive Double Clad Fiber, Core: 10 µm, Cladding: 125 µm, NA >0.46

$10.70
Per Meter
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P-20/390DC

Passive Double Clad Fiber, Core: 20 µm, Cladding: 390 µm, NA >0.46

$54.50
Per Meter
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P-40/140DC

Passive Double Clad Fiber,Core:40 µm, Cladding:140 µm,NA>0.09

$66.00
Per Meter
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Ytterbium Doped Optical Fiber

Highly Doped Ytterbium Fibers

Available Ytterbium Doped Fibers

Production Notes

Single Mode Core Pumped Fiber

Double Cladding SM and MM Fibers

Fiber Compatibility

Features

Passive Fiber Specs