A method for adjusting the wavelength and dominant mode of a laser fiber
prior to installation in a laser assembly includes the steps of linearly
stretching the laser fiber so as to modify its output wavelength, axially
twisting the laser fiber so as to modify its dominant mode, and affixing
the laser fiber to a laser assembly in its linearly stretched and axially
twisted condition. The laser assembly includes a dynamic tuning mechanism
for wavelength adjustment during use. The twisted and stretched fiber has
an unadjusted wavelength and dominant mode that are within a selected
range before adjustment by the dynamic tuning mechanism.