We present an experimental characterization of how signal gain saturation affects the transfer of intensity modulation from the pump to the signal in single-pump, phase-insensitive fiber optic parametric amplifiers (FOPAs). In this work, we demonstrate experimentally for the first time, to our knowledge, how gain saturation of a FOPA reduces the noise contribution due to the transfer of pump power fluctuations to the signal. In a particular example, it is shown that the transferred noise is significantly reduced by a factor of 3, while the FOPA gain remains above 10 dB.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: November 20, 2012
Revised Manuscript: February 13, 2013
Manuscript Accepted: February 13, 2013
Published: March 12, 2013
Valentina Cristofori, Zohreh Lali-Dastjerdi, Toke Lund-Hansen, Christophe Peucheret, and Karsten Rottwitt, "Experimental investigation of saturation effect on pump-to-signal intensity modulation transfer in single-pump phase-insensitive fiber optic parametric amplifiers," J. Opt. Soc. Am. B 30, 884-888 (2013)