Question: A long single - mode optical fiber has an attenuation of 0 . 5 dB km 1 when operating at a wavelength of 1 .

A long single-mode optical fiber has an attenuation of 0.5 dB km1 when operating at a wavelength of 1.2 m. The fiber core diameter is 6 m and the laser source bandwidth is 600 MHz. Compare the threshold optical powers for stimulated Brillouin and Raman scattering within the fiber at the wavelength specified.

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