Optical fiber laser coupler

Abstract

An optical fiber laser coupler, comprising a laser input optical cable, a laser shaping and coupling device, and a multi-beam-mode energy transmission fiber (). The multi-beam-mode energy transmission fiber () comprises a circular fiber core () and annular fiber cores (), and each annular fiber core () is coaxial with the circular fiber core (). A fluorine-doped layer () is disposed between the circular fiber core () and the annular fiber core (), and the fluorine-doped layer () is also disposed between adjacent annular fiber cores (). An adjustable collimating lens group () and an adjustable focusing lens group () of the laser shaping and coupling device can horizontally move along a direction of a laser beam in a housing of the laser shaping and coupling device. The laser shaping and coupling device is configured to couple and input the laser beam input by the laser input optical cable into different fiber cores of the multi-beam-mode energy transmission fiber (), and obtain output laser beams of different beam modes. The optical fiber laser coupler of the present application can independently implement real-time switching between different beam modes by combining different fiber core structures of the multi-beam-mode energy transmission fiber by means of the laser shaping and coupling device.