US 12,068,584 B2
Semiconductor-fiber-laser assembly and fiber laser
Xiaohua Chen, Beijing (CN); Weirong Guo, Beijing (CN); and Baohua Wang, Beijing (CN)
Assigned to BWT BEIJING LTD., Beijing (CN)
Appl. No. 17/288,194
Filed by BWT Beijing Ltd., Beijing (CN)
PCT Filed Dec. 28, 2020, PCT No. PCT/CN2020/140220
§ 371(c)(1), (2) Date Apr. 23, 2021,
PCT Pub. No. WO2022/140930, PCT Pub. Date Jul. 7, 2022.
Prior Publication US 2022/0399699 A1, Dec. 15, 2022
Int. Cl. H01S 5/40 (2006.01); H01S 5/00 (2006.01); H01S 5/02251 (2021.01); H01S 5/02253 (2021.01); H01S 5/04 (2006.01)
CPC H01S 5/4012 (2013.01) [H01S 5/0071 (2013.01); H01S 5/02251 (2021.01); H01S 5/02253 (2021.01); H01S 5/041 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A semiconductor-fiber-laser assembly, comprising:
a pumping module, an active optical fiber and an assembling board;
wherein the active optical fiber is provided on an upper surface of the assembling board, the pumping module is provided on a surface of the assembling board that is the same as or opposite to a surface where the active optical fiber is located, the pumping module includes a cooling device configured to cool the active optical fiber via the assembling board,
wherein an input-side optical-fiber grating and an output-side optical-fiber grating are provided at two ends of the active optical fiber, to form a laser resonator between the input-side optical-fiber grating and the output-side optical-fiber grating,
wherein the pumping module comprises a plurality of semiconductor-laser single emitters, a collimating-lens group and a mirror group that are sequentially arranged, and light beams from the semiconductor-laser single emitters pass through the reflecting-mirror group to realize beam combination,
wherein the mirror group comprises a plurality of first steering mirrors respectively corresponding to the plurality of semiconductor-laser single emitters and that are configured to reflect the light beams of the semiconductor-laser single emitters in a cross-section perpendicular to a propagation direction of the light beams and a propagation direction of the reflected light beams are inclined upwards relative to the assembling board, which is a plane, and
wherein the mirror group further comprises a second steering mirror and/or a polarization beam combining component, the light beams emitted from the semiconductor-laser single emitters pass through the first steering mirrors and then form a single light-beam stack that passes through the second steering mirror and/or the polarization beam combining component, and then is coupled by a coupling lens into a tail fiber of the pumping module.