Patent ID: 6415088
Filing Date: 2002-07-02
Classification: G02B,H01S

Abstract:
A method for compensation of dispersion of a fluoride based fiber laser, a high negative dispersion of the fiber laser in a second optical window being compensated for with a compensation fiber, the method comprising:coupling the active fiber of the fiber laser to the compensation fiber, the compensation fiber including a stepped silica glass core with cladding; fluoride doping the cladding so as to achieve a controlled lowering of a refractive index of a grid trough, a degree of the lowering of the refractive index of the grid trough being determined according to the following relationship: 2&it;Î”i=(ni2-nSIO22nSIO22)&CenterDot;100&it;â€ƒ&it;(%);anddimensioning a length of the compensation fiber so that a positive dispersion value achieved through the fluoride doping is elevated to a certain positive dispersion value required for compensation at &lgr;=1300 nm, the positive dispersion value achieved through the fluoride doping increasing proportionally to the length.