Crystal Fibre Series
Jan 2010NKT Photonics A/SRequest Info
Single-Mode Pulse Amplifier Fiber BIRKERØD, Denmark, Jan. 14, 2010 – NKT Photonics A/S has introduced a new version of its Crystal Fibre series double-clad rod-type fiber for use in high-performance fiber amplifiers. The DC-285/100-PM-Yb-ROD is based on proprietary and patented Crystal Fibre air-clad technology and features a strictly single-mode 100-µm polarization-maintaining core with high absorption and low photodarkening. The ytterbium-doped rod is typically used in output stages of amplifier chains for high-power pulsed laser amplification where it can sustain megawatt peak power levels.
The ytterbium core offers an effective mode field area of >4500 µm2. The 285-µm pump core diameter accepts pump light at numerical aperture values of up to 0.55 for pumping at 915 or 976 nm. Pump absorption is 30 dB/m for 976-nm pumping.
Output of the rod fiber is robust single-transverse mode beam quality, and it has been tested with >100-W average power over a range of pulse durations and repetition rates.
The fiber is designed for OEM use for industrial customers. It can be employed as an extension of output energy levels for existing fiber amplifiers or as a replacement for traditional crystalline rods such as Nd:YAG, Nd:YVO4 and Nd:YLF. Compared to such traditional laser rods, the rod fiber offers high beam quality guidance of the signal and pump, without thermal lensing. The rod fiber has a high single pass gain and a polarization extinction ratio of >15 dB, and pump absorption is polarization-independent.
The pulse amplifier fiber is available from stock as bare fiber with end-sealed and angle-cleaved facets or with 8 × 8-mm antireflection-coated silica end caps.
For more information, visit: www.nktphotonics.com
NKT Photonics A/S
Phone: +45 4348 2825
US: (310) 491-7152
Fax: +45 4348 3901