We analyze and implement mutually modulated cross-gain modulation (MMXGM) in a semiconductor optical amplifier (SOA). In this effect, optical wavelength changes are converted into modulation phase changes with high sensitivity and resolution. In the slow-light transition regime, we demonstrate picometer sensitivity to the optical wavelength. We analyze the spectroscopic performance of the SOA-based MMXGM and the previously developed Brillouin-based MMXGM techniques, and compare them to that of material-dispersion-enhanced, slow-light spectroscopy in a Brillouin amplifier.
© 2013 Optical Society of America
Original Manuscript: December 19, 2012
Revised Manuscript: February 18, 2013
Manuscript Accepted: February 18, 2013
Published: March 21, 2013
Shalom Bloch, Alexander Lifshitz, Er’el Granot, and Shmuel Sternklar, "Wavelength monitoring with mutually modulated cross-gain modulation in a semiconductor optical amplifier and Brillouin amplifier," J. Opt. Soc. Am. B 30, 974-977 (2013)