Fig. 1. Narrow band spectrum filtering system base on double MLD gratings

Fig. 2. Location of light intensity distribution of different wavelengths

Fig. 3. Distribution of slit transmission spectrum

Fig. 4. Relationship between filtering spectral width and slit width

Fig. 5. Relationship between effective spectral energy and slit width

Fig. 6. Relationship between filtering spectral width and focal length of the lens

Fig. 7. Relationship between effective spectral energy and focal length of the lens

Fig. 8. Relationship between filtering spectral width and slit width

Fig. 9. Relationship between effective spectral energy and slit width

Fig. 10. Relationship between filtering spectral width and focal length of the lens

Fig. 11. Relationship between effective spectral enegy and focal length of the lens

Fig. 12. (a) Zero-grating experiment system; (b) single-grating experiment system; (c) double-grating experiment system

Fig. 13. Experimental results. (a) Zero-grating system; (b) single-grating system; (c) double-grating system

Fig. 14. Relationship between facula center position and angle offset

Fig. 15. Relationship between facula center position and wavelength

Fig. 16. System simulation of CODE V

Fig. 17. Theoretical aberration of the narrow band spectrum filtering system using double MLD grattings

Fig. 18. Spectrum of input laser

Fig. 19. Spectrum of output laser