Following up on the previous post (wich covered the 532nm laser), I played around with the spectrometer expectatios for these lasers. An effective way to center the spectrum is by rotating the difraction grid. However, for the two lower energy lasers the refraction angles become very acute and the effective wavelenth range small. Better results are obtained when the diffraction grid is changed from 1800 l/mm to 1200 l/mm for the two higher energy lasers (see plots below). I believe this jives with the text in the refurbished spectrometer's vendor website, where the upper range of the 1800 l/mm grid is quoted at 700nm.

Below are suggested diffraction grid setup angle and diffraction grating for the other lasers above. Other parameters are unchanged from the previous post, so when changing the Raman source lasers, one may only need to adjust the spectrometer's diffraction grating.

405nm: δ = 11, d = 555.6nm (1800 l/mm) 

532nm: δ = 3, d = 555.6nm (1800 l/mm) 

680nm: δ = 8, d = 833.3nm (1200 l/mm) 

780nm: δ = 4, d = 833.3nm (1200 l/mm) 

Finally, the spectrometer sensitivity is lower at the higher wavelengths (last picture), so the 800mW power for the 780nm laser seems like a good idea.