Fig. 1. Integral mechanical structure encapsulated optical system

Fig. 2. Quasi divergence angles of fast and slow axis and light spot after collimation

Fig. 3. Diagram of fast and slow axis collimation optical path system. (a) Fast axis collimation of single bar; (b) slow axis collimation of single bar

Fig. 4. Physical structure of similar stepped prism

Fig. 5. Optical path system diagram of light beam passing through stepped prism

Fig. 6. Light beam is refracted through two 30°rectangular prisms to fill dark region of fast axis

Fig. 7. Diagram of (a) structure and (b) principle of polarization beam combiner

Fig. 8. Optical path system diagram of compressing beam width of slow axis by polarization beam combiner

Fig. 9. Optical path system diagram of decreasing divergence angle of slow axis by beam expansion system

Fig. 10. NA values of focus spot in fast and slow axis

Fig. 11. Diagram of overall fiber coupling system and fiber output light spot

Fig. 12. Energy loss analysis in fiber coupling process