A Multi-Wavelength Brillouin Fiber Laser of a Widely Tunable Profile Gain Raman Pumping

Abstract

This paper presents a realization of a high input pumping Raman
Power (RP) multi-wavelength Brillouin Fiber Laser (BFL) with a
single Brillouin spacing line at room temperature. A traditional ring
cavity fiber of extremely nonlinear properties, as a Brillouin Gain
Medium (BGM) of 2km length, and a 3-dB coupler are engaged for
single line spacing (odd-ordered) and Brillouin frequency shift
Stokes distinctions. A numerical simulation based on Finite Element
Method of Multiphysics COMSOL software algorithms is conducted
to discuss the obtained results theoretically. From the obtained
results, it is indicated that at Brillouin Pumping (BP) power of 8
dBm and RP power of 900 mW, 130 single spacing comb lines are
formed with a channel wavelength spacing of 0.0782 nm. Moreover,
it is noticed by reducing the RP power and the BGM length, an
observable reduction is taken place in the lines number.
Nevertheless, it is observed that the proposed BFL can be widely
tuned in C and L-bands within a wavelength sweeping from 1550nm
to 1620nm