Quantum Solitons: Control and Spectral Broadening

Andreas Sizmann

Stephen R. Friberg, S. Machida, M. J. Werner +2 more

We report the photon-number squeezing of optical solitons. 2.7 ps pulses were launched as solitons down a 1.5 km optical fiber. For energies slightly above that of fundamental solitons, they broadened spectrally due to self-phase modulation caused by ${\ensuremath{\chi}}^{(3)}$ nonlinearities. Filtering away outlying components of the broadened spectra squeezed the soliton's photon-number fluctuations to 2.3 dB (41%) below the shot-noise limit. Accounting for losses, this corresponds to 3.7 dB (57%) photon-number squeezing. A quantum field-theoretic model shows that the outlying spectral components have large energy fluctuations, so that their removal causes squeezing.

F. Kh. Abdullaev, Sergei Darmanyan, Pulat K. Khabibullaev

Roidar Khan, Muhammad Haneef, Maqsood Iqbal +4 more

Abstract We investigate the possibility of creating spectral hole burning in surface plasmon polaritons (SPPs) at the interface of sodium vapor and gold media. The spectral holes are measured at specific parameters, phases and directions of the control fields. The direction and phase of the control field affect the creation of spectral hole burning in SPPs the most. The pulse shape in the spectral burning hole region is uniform and undistorted due to the cancellation of nonlinear Doppler broadening and large group velocity dispersion. The behavior of SPPs pulse in the spectral hole region is that of solitons, which arise due to cancellation of large positive dispersion for phase shift with nonlinear effect.. The results may have potential applications in nano-photonics, plasmonsters, photovoltaic devices, cloaking and sensing technology.

N. H. Christ, T. D. Lee

M Ijaz khan, M. Idrees, Bakht Amin Bacha +3 more

Abstract In this article we have controlled and modified the absorption, dispersion, reflection and transmission spectrum within a cesium atomic medium under the Doppler broadening effect. The Doppler and inverse Doppler effect show significant influence on the absorption and dispersion as well as the corresponding transmission and reflection spectrum. The output pulses intensity ∣ S out ( t ) ∣ 2 show no losses in the medium. The distortion free pulse propagation is investigated by taking into account Doppler and inverse Doppler broadening effect and Rabi oscillations. The dispersive and nonlinear effects cancellation has been achieved in the medium, which show soliton pulse propagation in the medium with the strength of Rabi oscillation and inverse Doppler broadening. The results obtained could have potential applications in soliton radar technology.