Methods for making active laser fibers

摘要

Methods for making active laser fibers include the production of an optical fiber with disturbed (or deviated) cylindrical symmetry on the glass surface of the fiber. The methods include a preform containing a central core made of glass. In one embodiment, the preform is circular and surrounded by additional glass rods and an outer glass jacket tube. In a first alternative embodiment, this preform is merged during fiber drawing. In a second alternative embodiment, the preform merged in a process forming a compact glass body with disturbed cylindrical symmetry. This compact preform is drawn into a fiber under conditions maintaining the disturbed cylindrical symmetry.

主权项

1. A method for making an optical fiber having an irregular cylindrical shape and a pump core with disturbed cylinder symmetry, comprising:
arranging a first glass rod to be central to a plurality of second glass rods, and wherein the first glass rod has a shape in cross-section; enclosing the first and second glass rods within an outer jacket tube to make a preform; merging the preform by drawing the preform into a fiber wherein the plurality of second glass rods are connected with the first glass rod in the fiber, and the fiber is configured such that pump light guided in the plurality of second glass rods enters the first glass rod directly, wherein the first glass rod in the fiber retains the shape in cross-section.