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DC-200/85-Yb-ROD0 pages
Crystal Fibre • aeroLASE • Koheras • SuperK
Photonics
the power of light
DC-200/85-Yb-ROD
Ytterbium doped ROD fiber with ultra large mode area
Large
Mode-area
Rod ^^^B Rare Earth
Vtoveguide ^^^V Doped
• Extremely large mode area
• High pump absorption
• Can be operated in PM mode
With an effective area above 3000 [im2, the DC-200/85-Yb-ROD
represents the pinnacle of active gain fibers. The very large
effective area combined with extremely high pump-absorption
of up to 30dB/m pushes the nonlinear thresholds to a new re-
gime in fibers. The rod is aimed at high peak-power pulsed am-
plifiers and has been shown to handle mega-Watt peak-power
levels.
The multimode pump light is guided by our proven airclad tech-
nology, ensuring low loss, high damage threshold and a large
numerical aperture (NA). The large NA relaxes tolerances on
coupling optics and facilitates the use of lower brightness di-
odes.
The DC-200/85-Yb-ROD is a rod fiber with an outer diameter of
1.7 mm - bridging the DPSS and fiber laser world. The large
outer diameter ensures that the extremely large core will not
suffer from bending loss. Moreover, the rod is coating free to
facilitate thermal management in high-power setups. The rods
are available with large AR coated end-caps in a range of stan-
dard lengths. Other configurations are available upon request.
For polarization maintaining RODs, we recommend our DC-
285/100-PM-Yb-ROD.
More info on using ROD fibers can be found on our website at
www.nktphotonics.com /support
Applications
- Ultra high-power amplifiers
- Ultra high-power polarized lasers
- Ultra high-power Q-switched lasers
Signal core
Mode field diameter
65 ± 5 pm
NA@ 1060 nm
Multimode pump core
~ 0.02
Numerical aperture @ 950 nm
0.55 ± 0.05
Pump absorption @ 920 nm
• 10 dB/m
Pump absorption @ 976 nm
System performance
~ 30 dB/m
NL FOM «
~ 8 [rad-ns/mj]
Slope efficiency(2)
15The nonlinear figure-of-merit is calculated as:
~ 60 %
NL FOM =
r -lO6
inax
go
rod ■
mJ
(2) With respect to pump power in the fiber
Physical properties Standard configuration
Core material Yb-doped silica Rod length End 1 End 2
Outer cladding diameter 1.7 ±0.1 mm Type I 36 cm End cap End cap
Coating None Type II 55 cm End cap End cap
Signal core diameter 8515 pm Type III 55 cm End cap Sealing
Pump-cladding diameter 200 ± 5 pm Type IV 80 cm End cap End cap
Pump-cladding shape Circular TypeV 80 cm End cap Sealing
Outer cladding material Pure silica Type VI 120 cm Sealing Sealing
Inner cladding material Pure silica
Sealed ends are angle-cleaved to 30 ± i° to minimize reflection from the facet.
Sealing length is 50 |jm ± 25 |jm (measured on the airclad).
The standard configurations are available from stock. Other configurations can be
manufactured upon request.
DC-20o/85-Yb-ROD-no622
NKT Photonics A/S (Headquarters)
Blokken 84 • 3460 Birkerod • Denmark
Phone: +45 4348 3900
Fax: +45 4348 3901
www.nktphotonics.com
NKT Photonics GmbH
Schanzenstrasse 39 • Bldg D9-D13
51063 Cologne • Germany
Phone: +49 221 99511-0
Fax: +49 221 99511-650
NKT Photonics Inc.
1400 Campus Drive West • Morganville
NJ 07751 • USA ■
Phone: +1 732 972 9937
Fax: +1 732 414 4094
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