Title :
Low-noise amplification under the 3 dB noise figure in high-gain phase-sensitive fibre amplifier
Author :
Imajuku, W. ; Takada, A. ; Yamabayashi, Y.
Author_Institution :
NTT Network Innovation Labs., Kanagawa, Japan
fDate :
10/28/1999 12:00:00 AM
Abstract :
A noise figure which is less than the standard quantum limit of 3 dB has been observed for the first time in a high gain phase-sensitive fibre parametric amplifier. A noise figure of 1.8 dB with a 16 dB signal gain was measured by a precisely calibrated electrical spectrum analyser
Keywords :
optical fibre amplifiers; optical noise; optical parametric amplifiers; spectral analysers; 1.8 dB; 16 dB; high-gain phase-sensitive fibre amplifier; low-noise amplification; noise figure; parametric amplifier; precisely calibrated electrical spectrum analyser; signal gain; standard quantum limit;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19991343
