Determine the threshold optical power in a long single-mode fiber with 0.5 dB km-1 for stimulated Brillouin scattering within the fiber at a wavelength of 1.3 nm. The fiber core diameter is 6 μm and laser source bandwidth is 600 MHz.

Determine the threshold optical power in a long single-mode fiber with

1.	Determine the threshold optical power in a long single-mode fiber with 0.5 dB km-1 for stimulated Brillouin scattering within the fiber at a wavelength of 1.3 nm. The fiber core diameter is 6 μm and laser source bandwidth is 600 MHz.
A.	1.5 W
B.	1.38 W
C.	80.3 mW
D.	65.2 mW
Answer» D. 65.2 mW