High power fiber laser system with distributive mode absorber

摘要

A clad absorber unit is provided on a passive fiber of a high power fiber laser system and operative to trap and remove modes propagating along the waveguide clad of the fiber. The mode absorber is configured with such an optimal length that the clad light may be removed in a localized manner, substantially uniformly removed over the entire length thereof. The absorber removing clad light in a unformed fashion includes a host material impregnated with diffusers.

主权项

1. A clad mode stripper (“CMS”) unit for a high power fiber laser system, comprising:
a passive fiber configured with a core, at least one waveguide cladding surrounding the core, and a polymeric sheath coated upon the cladding and having a discontinuous surface which defines an opening terminating in a plane of the cladding; and a clad mode stripper (“CMS”) filling the opening so as to cover an exposed portion of the cladding, the CMS being configured to provide a substantially uniform removal of a multimode (“MM”) light from the cladding along an entire length of the CMS at a maximum dissipated light power heating the CMS at a temperature lower than a thermal threshold at which the CMS is damaged.