Hello, i'am working on a DIY Raman probe.
I have checked three 532nm lasers :
1) 532nm cheap laser pointer 1mw
2) 532nm 50$ laser pointer 5mw
3) 532nm 200$ laser module, from Thorlabs, 4.5mw
When i use my spectrometer (LR1 from Aseq), with any of this lasers, i can see that :
532 nm main wave...