High-power laser beam splitting optical fiber device

The invention discloses a high-power laser beam splitting optical fiber device, which comprises a solid laser, wherein a first half-transmitting half-reflecting mirror, a third half-transmitting half-reflecting mirror and a second focusing lens are arranged on a straight light path of a laser beam; a second half-transmitting half-reflecting mirror and a first completely reflecting mirror are arranged on the right side of the first half-transmitting half-reflecting mirror; a second completely reflecting mirror is arranged on the left side of the third half-transmitting half-reflecting mirror; a first focusing lens is arranged on a light path of reflected light of the second completely reflecting mirror; a third focusing lens is arranged on a light path of reflected light of the second half-transmitting half-reflecting mirror; a fourth focusing lens is arranged on a light path of reflected light of the first completely reflecting mirror; the first, second, third and fourth focusing lenses are respectively connected with first, second, third and fourth optical fibers. The device is compact in structure and convenient to operate; the laser beam can be divided into four or two to be coupled into the optical fibers, so that the device is multifunctional, and the overall coupling efficiency reaches 85 percent above.