The research of High-Power Fiber Laser Wavelength Beam Combining Technology

Fig. 1 Limiting factors of fiber lasers with increasing output powerFigure 2. The Fundamental Principle of Wavelength Beam Combining (WBC)Figure 3. Spectral Relationship Between Dichroic Mirrors and Combined Sub-BeamsFigure 4. Schematic Diagram of Beam Quality Degradation Induced by Dichroic Mirrors During Beam Combining ProcessFigure 5. Experimental setup and test results of three-sub-beam wavelength beam combiningFigure 6. Maximum temperature rise of dichroic mirrors during beam combining operationFigure 7. During laser emission, the output power and optical axis deviation of the combined laser beam.(a) Laser power; (b) Optical axis driftFigure 8. Far-field beam profiles after 140s of combined laser operation(a) Combined spot of Beam1,2,3; (b) Combined spot of Beam1,2; (c) Spot of Beam1