The optical gain spectrum

Joseph H. Simmons, Kelly S. Potter

Gabriel K. W. Gan, Yu Gang Shee, Kwok Shien Yeo +3 more

We experimentally demonstrate optical delay in the second-order Brillouin gain spectrum by incorporating a double Brillouin-frequency shifter into the system. By coinciding the seed signal with the second-order Brillouin gain spectrum, it was found that the seed signal experienced significantly larger delay as compared to the Brillouin slow light generated from the first-order Brillouin spectrum. At a Brillouin gain of 17 dB, the delay was found to be at maximum of 60 ns. This widens the window of promising opportunities into the deployment of all optical tunable delay into the existing optical signal processing.

Stig Stenholm

G. S. Agarwal

A theoretical model for studying the effects of optical gain and the cavity-mode squeezing on the spectrum of radiation produced by coherently driven two-level atoms is developed. The squeezing of the cavity mode dramatically affects the central component leading to a spike in the spectrum which becomes more pronounced with the increase in optical gain and squeezing. The squeezing can also affect the three photon Rabi sideband and can facilitate laser oscillation at such frequencies.

A F J Levi

Yifu Zhu, Qilin Wu, S. Morin +1 more

A feature associated with continuous-wave two-photon optical gain has been observed in the absorption spectrum of an ensemble of barium atoms driven by a strong near-resonant optical field. In the dressed-atom picture, the observed gain is attributable to inverted two-photon transitions with nearly resonant intermediate states. A cw optical two-photon laser utilizing this gain appears feasible.