All-optical conversion from phase-modulated signals to intensity-modulated signals is theoretically demonstrated in semiconductor optical amplifiers (SOAs). Large-signal and small-signal calculations show significant conversion responses appearing as a result of even minute reflections at the end mirrors of the SOA. It is discussed how reflected phase-modulated signals can lead to interference resulting in intensity fluctuations that are amplified by the gain in a SOA. The effect can be utilized for deliberate conversion between optical modulation formats.
© 2010 Optical Society of America
Original Manuscript: December 4, 2009
Revised Manuscript: January 24, 2010
Manuscript Accepted: January 27, 2010
Published: February 26, 2010
Søren Blaaberg and Jesper Mørk, "Concept for phase-to-intensity conversion in SOAs by facet reflections," Opt. Lett. 35, 775-777 (2010)