Hi,
I uploaded spectrum that I am getting. I am interested in backscattering Raman. Anti-Stokes band should be a bit lower in power than Stokes band but I am getting difference of 100dB between them and even more. That is a lot. Also Anti-Stokes is lower than noise that I added in bidirectional fiber to even see spontaneous Raman scattering. Also there is backscatter Rayleigh. I’ve tried to change Raman coefficient but only Raman Stokes band is getting stronger, and Raman Anti-Stokes band is getting weaker with bigger coefficient. Pump power is set at 1W, fiber is 10km long.
Thanks in advance,
Ivan
Links to images:
https://www.dropbox.com/s/0628qy5f2rvynjs/Raman1W0.310km300K.bmp?dl=0
https://www.dropbox.com/s/8gfng69dahsst4q/Raman1W0.9910km300K.bmp?dl=0
