| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide single-mode and multi-mode holey fibers having large core dimensions, and devices and systems that use such fibers as lasers and amplifiers. <P>SOLUTION: Various types of holey fibers provide optical propagation. In various embodiments, for example, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the core is used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses are performed by adjusting the hole dimension and/or the hole spacing to yield a desired operation with a desired leakage loss of the fundamental mode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
