DC-285-100-PM-Yb-ROD - NKT Photonics - #1

Text version of the page

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 0.6 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