Holey fiber, and laser device using the same

摘要

The invention aims to provide a holey fiber that can release leak light propagating through the clad at a desired location, and a laser device using the holey fiber. A holey fiber includes: one end and the other end; a core; an inner clad coating the core; a hole layer having a large number of holes formed therein and coating the inner clad; and an outer clad coating the hole layer. In this holey fiber, a collapse region is formed, and the holes in the collapse region are squashed by a predetermined length in the length direction of the fiber.

主权项

1. A holey fiber comprising:
one end and the other end; a core; an inner clad coating the core; a hole layer having a large number of holes formed therein and coating the inner clad; and an outer clad coating the hole layer, wherein a collapse region is formed, the holes in the collapse region being squashed by a predetermined length in a length direction of the fiber, and wherein, in the collapse region, the holes are squashed to reduce diameters thereof in a stepwise fashion in a direction from the one end toward the other end.