Pump and Signal Taper for Airclad Fibers

摘要

This report results from a contract tasking Crystal Fibre A/S as follows: Crystal Fibre A/S will develop a taper/coupler solution to interface between a new polarization maintaining/polarizing amplifier fiber (DC-200-35-Yb- PM) and respectively pump fibers and a signal input fiber. The anticipated intermediate interface will be a 250 micron/0.46 NA pump guide and 20 micron MFD PM signal core fiber. We will seek to further interface this fiber to a tapered fiber bundle with either 100 or 200 micron pump fibers and a polarization maintaining signal input fiber. It is the goal to achieve an interface with 6 multi-mode pump input ports consisting of 200/220 0.22 NA fiber with a polarization maintaining 20 micron core signal feed-through capable of single-mode operation at 1064nm. In case this is not possible a fallback solution will be 6 (or more) multi-mode pump input ports consisting of 105/125 0.15 (or 0.22) NA fiber with a polarization maintaining 7 micron core signal feed-through capable of single-mode operation at 1064nm. Two fiber amplifier sub-assemblies including the developed components and an appropriate length of active fiber (3-4 m) will be delivered at the end of the project.