Fiber-optic system and method for manufacturing same

摘要

In a fiber amplifier including a third optical fiber made of a double clad fiber for amplifying light and a fifth optical fiber made of a single clad fiber for transmitting the light amplified by the double clad fiber, a fourth optical fiber made of a triple clad fiber is inserted between the third optical fiber and the fifth optical fiber.

主权项

1. A fiber-optic system comprising:
a double clad fiber for amplifying light, the double clad fiber having a core, a first clad and a second clad; a single clad fiber for transmitting the light amplified by the double clad fiber, the single clad fiber having a core and a first clad; and a triple clad fiber inserted between the double clad fiber and the single clad fiber, the triple clad fiber including a core, a first clad, a second clad and a third clad, the triple clad fiber including a plurality of triple clad fiber elements whose first clads have different cross sectional areas, respectively, the plurality of triple clad fiber elements being joined so that a cross section of a first clad of each one of the plurality of triple clad fiber elements except a triple clad fiber element farthest from the double clad fiber overlaps with cross sections of both of a first clad and a second clad of another one of the plurality of triple clad fiber elements, the another one of the plurality of triple clad fiber elements being joined to the each one of the plurality of the triple clad fiber elements, on a side opposite to a side where the double clad fiber is joined to the triple clad fiber.