Fiber identification technique based on long-period grating for bending-loss insensitive fibers

Abstract

The macro-bending based fiber identification technique is widely used to identify the optical fibers at the worksite. While bending-loss insensitive fibers have been received increasing attention, it is difficult to apply the macro-bending based fiber identification technique to these fibers. In this paper, we propose a new fiber identification technique based on long-period grating technique. We also show that the proposed technique can be utilized for a hole-assisted fiber with an extremely low bending loss.