Method for manufacturing a coupling arrangement, coupling arrangement and amplifier

摘要

The inventions relates to a method for manufacturing an asymmetric coupling arrangement (20) for coupling light of one second wavelength from a single mode pump fibre at the pump wavelength (2) into a single mode signal fibre at the signal wavelength (8),
- wherein the single mode pump fibre at the pump wavelength (2) and the single mode signal fibre at the signal wavelength (8) are different from one another,
- wherein the method comprises the following steps:
a) pre-tapering the single mode pump fibre at the pump wavelength (2) or the signal fibre at the signal wavelength (8) according to a predetermined pre-taper parameter in order to arrive at matched propagation constants for the two fibres at either the signal or the pump wavelength;
b) connecting the pump fibre (2) and the signal fibre (8), preferably by fusion.