Q.2/ The threshold optical powers for stimulated Brillouin and Raman scattering in a single-mode fiber with a long 8 um core diameter are found to be 190 mW and 1.70 W, respectively, when using an...

Extracted text: Q.2/ The threshold optical powers for stimulated Brillouin and Raman scattering in a single-mode fiber with a long 8 um core diameter are found to be 190 mW and 1.70 W, respectively, when using an injection laser source with a bandwidth of 1 GHz. Calculate the operating wavelength of the laser and the attenuation in decibels per kilometer of the fiber at this wavelength.