Broadband SBS Slow Light in an Optical Fiber

Details Broadband SBS Slow Light in an Optical Fiber Broadband SBS Slow Light in an Optical Fiber

2006-07-18

arxiv.org/abs/physics/0607169v1

Physics

Optics

5 pages, 5 figures; submitted to Journal of Lightwave Technology in May 2006

Scientific paper

10.1364/OE.14.007238

We investigate slow-light via stimulated Brillouin scattering in a room temperature optical fiber that is pumped by a spectrally broadened laser. Broadening the spectrum of the pump field increases the linewidth $\Delta\omega_p$ of the Stokes amplifying resonance, thereby increasing the slow-light bandwidth. One physical bandwidth limitation occurs when the linewidth becomes several times larger than the Brillouin frequency shift $\Omega_B$ so that the anti-Stokes absorbing resonance cancels out substantially the Stokes amplifying resonance and hence the slow-light effect. We find that partial overlap of the Stokes and anti-Stokes resonances can actually lead to an enhancement of the slow-light delay - bandwidth product when $\Delta\omega_p \simeq 1.3 \Omega_B$. Using this general approach, we increase the Brillouin slow-light bandwidth to over 12 GHz from its nominal linewidth of $\sim$30 MHz obtained for monochromatic pumping. We controllably delay 75-ps-long pulses by up to 47 ps and study the data pattern dependence of the broadband SBS slow-light system.

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