Fig. 1. Diagram of single LD chip package

Fig. 2. Curves of power and voltage of single cos chip

Fig. 3. Curves of divergence angle and wavelength distribution of single cos chip. (a) Curve of divergence angle; (b) wavelength distribution curve

Fig. 4. Diagrams of slow axis collimation mirrors. (a) Ideal collimation mirror; (b) tilt collimation mirror

Fig. 5. Diagram of pigtail module based on 7 steps

Fig. 6. Physical picture of slow axis collimation mirror

Fig. 7. Physical pictures of module. (a) Debug diagram of single chip; (b) debug diagram of multiple single chip

Fig. 8. Measured spots of near and far fields. Spot distributions of (a) near field and (b) far field without slow axis collimation mirror; Spot distributions of (c) near field and (d) far field with slow axis collimation mirror

Fig. 9. Measured results of pointing error before and after correlation

Fig. 10. Optical designs of LD module. (a) Ray tracing; (b) fiber coupling with large pointing error; (c) spot filled fibers for small and large pointing errors

Fig. 11. Measured curves of power and efficiency of LD module with tail fiber output