Patent ID: 9270074
Filing Date: 2016-02-23
CPC Classification: H01S,Y10T

Claim Text:
1. A method for manufacturing an optical fibre laser comprising a mechanical mount and an optical fibre attached to the mechanical mount at two attachment points, the method comprising: obtaining an optical fibre having a first end and a second end with light to be received via the first end, the optical fibre having a doped section for (i) absorbing at least one portion of the light received via the first end and (ii) emitting light to the first end so that light is output through the first end, applying a torsion angle to the optical fibre, supplying light having a power referred to as a pump power at the first end of the optical fibre, measuring a Polarisation Extinction Ratio of the light output from the first end of the optical fibre throughout a predetermined range of the pump power, verifying if the Polarization Extension Ratio remains greater than a predetermined value throughout the predetermined range of the pump power, and if the Polarisation Extinction Ratio remains greater than the predetermined value throughout the predetermined range of the pump power, attaching the optical fibre to a mechanical mount at two attachment points of the optical fibre, a first attachment point being situated on a first side of the doped section, a second attachment point being situated on a second side of the doped section, with the torsion angle applied to the optical fibre, and producing the optical fibre laser comprising the mechanical mount and the optical fibre attached to the mechanical mount at the two attachment points, with the torsion angle applied to the optical fibre.