Fig. 1. Schematic diagram of the experimental setup of multiple Raman lasers in a single Raman cell. L1-L2: lens; DM: Dichroic mirror; PBS: polarized beam splitter; Prism: Pellin-Broca prism

Fig. 2. Experimental setup of multi-wavelength Raman lasers damage CCD. DM: Dichroic mirror; BS: beam splitter; DAC: data acquisition card

Fig. 3. The spectrum of the multi-wavelength Raman laser used in this paper

Fig. 4. The focused spots of Raman laser with different wavelengths on the CCD

Fig. 5. The output images of the damaged CCD at different severities. (a) Dot damage; (b) line damage; (c) total damage.

Fig. 6. The damage types and possibility of the CCD focused by the 496 nm Raman laser at different energy densities. (a) Dot damage; (b) line damage; (c) total damage

Fig. 7. The damage types and possibility of the CCD focused by the 574 nm Raman laser at different energy densities. (a) Dot damage; (b) line damage; (c) total damage

Fig. 8. The damage types and possibility of the CCD focused by the 630 nm Raman laser at different energy densities. (a) Dot damage; (b) line damage; (c) total damage

Fig. 9. The damage type and possibility of the CCD focused by the multi-wavelength lasers at different energy densities. (a) Dot damage; (b) line damage; (c) total damage

Fig. 10. The micrographs of the CCD damaged by a 496 nm Raman laser at different severities. (a) Dot damage; (b) line damage; (c) total damage

Fig. 11. The micrographs of the CCD damaged by a 574 nm Raman laser at different severities. (a) Dot damage; (b) line damage; (c) total damage

Fig. 12. The micrographs of the CCD damaged by a 630 nm Raman laser at different severities. (a) Dot damage; (b) line damage; (c) total damage

Fig. 13. The micrographs of the CCD damaged by the multi-wavelength lasers at different severities. (a) Dot damage; (b) line damage; (c) total damage