DC-285-100-PM-Yb-ROD0 pages

Rare Earth
Doped
Polarization
Maintaining
Rod
Waveguide
Large
Mode-area
The DC-285-100-PM-Yb-ROD represents the pinnacle of active
single mode fibers. The rod is polarization-maintaining and has
an effective area above 4500 ìm2. The very large effective area
combined with extremely high pump-absorption of up to 30dB/
m pushes the nonlinear thresholds to a new regime in singlemode
fibers. The rod is aimed at high peak-power pulsed amplifiers
and has been shown to handle mega-Watt peak-power
levels.
The multimode pump light is guided by our proven airclad technology,
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 diodes.
The DC-285-100-PM-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
standard lengths. Other configurations are available upon request.
More info on using ROD fibers can be found on our website at
www.nktphotonics.com/support
• Single mode
• Ultra large mode area
• Polarization maintaining
• High pump absorption
Crystal Fibre œ aeroLASE œ Koheras œ SuperK
NKT Photonics A/S (Headquarters)
Blokken 84 œ 3460 Birkerød œ Denmark
Phone: +45 4348 3900
Fax: +45 4348 3901
www.nktphotonics.com
NKT Photonics Inc.
1400 Campus Drive West œ Morganville
NJ 07751 œ USA
Phone: +1 732 972 9937
Fax: +1 732 414 4094
NKT Photonics GmbH
Schanzenstrasse 39 œ Bldg D9-D13
51063 Cologne œ Germany
Phone: +49 221 99511-0
Fax: +49 221 99511-650
Optical properties
Signal core
Single mode Yes
Mode field diameter 76 ± 5 ìm
Mode field area 4500± 200 ìm2
NA @ 1060 nm ~ 0.02
Multimode pump core
Numerical aperture @ 950 nm 0.6 ± 0.05
Pump absorption @ 920 nm ~ 10 dB/m
Pump absorption @ 976 nm ~ 30 dB/m
Slope efficiency ~60%
Polarization Parameters
Birefringence Än > 1·10-4
Polarization Extinction Ratio 15-25dB*
DC-285-100-PM-Yb-ROD
Single-mode ytterbium doped PM ROD fiber with ultra large mode area
* Depending on system configuration. The fiber should be operated in the slow-axis.
Applications
- Ultra high-power amplifiers
- Ultra high-power polarized lasers
- Ultra high-power Q-Switched lasers
End cap option
Material Pure silica
Length/diameter 8 mm / 8.2 mm
AR coating, R @ 1040-1080 nm < 0.1 %
AR coating, R @ 976 nm < 0.5 %
Angle 0° ± 0.7°
Signal return loss < -35 dB
NA supported > 0.6
Standard configuration
Type I End cap
Type II End cap
Type III Sealing
Type IV End cap
Type V Sealing
Type VI Sealing
36 cm
55 cm
55 cm
80 cm
80 cm
120 cm
End cap
End cap
End cap
End cap
End cap
Sealing
Rod length End 1 End 2
Sealed ends are angle-cleaved to 3° ± 1° to minimize reflection
from the facet. Sealing length is 50 ìm ± 25 ìm (measured on
the airclad).
The standard configurations are available from stock. Other
configurations can be manufactured upon request.
DC-285-100-PM-Yb-ROD-100409
Single
Mode
Physical properties
Core material Yb-doped silica
Outer cladding diameter 1.7 ± 0.1 mm
Coating None
Signal core diameter 100 ± 5 ìm
Pump-cladding diameter 285 ± 10 ìm
Pump-cladding shape Circular