Όνομα Συνεδρίου:34th Optical Fiber Communication (OFC/NFOEC 2010) Conference
By cascading two non-degenerate inline fiber-optic parametric amplifiers, we observe NF ~2dB (beating phase-insensitive quantum limit) at 16-dB gain for the second (phase-sensitive) stage after subtracting the excess noise from the first (phase-insensitive) stage.