Controllable ultra-broadband slow light in a warm Rubidium vapor

Abstract

We study ultra-broadband slow light in a warm Rubidium vapor cell. By working between the D1 and D2 transitions, we find a several-nm window centered at 788.4 nm in which the group index is highly uniform and the absorption is small (<1%). We demonstrate that we can control the group delay by varying the temperature of the cell, and observe a tunable fractional delay of 18 for pulses as short as 250 fs (6.9 nm bandwidth) with a fractional broadening of only 0.65 and a power leakage of 55%. We find that a simple theoretical model is in excellent agreement with the experimental results. Using this model, we discuss the impact of the pulse's spectral characteristics on the distortion it incurs during propagation through the vapor.

The first two authors contributed equally to this work

References in corpus (5)

• Wide-bandwidth, tunable, multiple-pulse-width optical delays using slow light in cesium vapor
• Low-distortion slow light using two absorption resonances
• Broadband SBS Slow Light in an Optical Fiber
• Broadband optical delay with large dynamic range using atomic dispersion
• Slow light with a swept-frequency source

Cited by in corpus (1)

• Measuring the Stokes parameters for light transmitted by a high-density rubidium vapour in large magnetic fields