Quantum limited amplifiers are sought after for a wide range of applications within quantum technologies and sensing. One promising candidate is the travelling wave parametric amplifier which exploits the non-linear kinetic inductance of a superconducting transmission line. This type of microwave amplifier promises to deliver a high gain, a quantum limited noise performance over several GHz ban...

Article history: Available online 10 August 2016

We propose and demonstrate a polarization independent Raman-assisted fiber optical parametric amplifier using depolarized Raman and parametric pumps. The polarization dependent gain fluctuation has been reduced from >10 dB to less than 1 dB.

Polarization-resolved four-wave mixing spectroscopy is used to study interwell carrier dynamics in an alternating-strain multiquantum-well optical amplifier. The experimental data are found to be in good agreement with a simple model based on quantum capture/escape and diffusion processes. The results suggest that the interwell transport in this structure is mainly limited by carrier escape, an...

M.Lassen, ∗ V.Delaubert, C.C.Harb, P.K.Lam, N.Treps, and H-A.Bachor The Australian National University, ACQOA, Canberra ACT 0200, Australia 2 Department of Physics, DTU, Building 309, DK-2800 Lyngby, Denmark 3 Laboratoire Kastler Brossel, 4 place Jussieu, case 74, Paris 75252 Cedex 05, France 4 School of Information Technology and Electrical Engineering, University College, The University of Ne...