Unraveling the phase-amplitude coupling modulation in a delay-coupled diode lasers functionality

• Main Authors: Kumar, Pramod, Sinha, Sudeshna, Pal, Vishwa, Mclnerney, John Gerard
• Format: Conference Proceeding
• Language: English
• Published: SPIE 22.02.2017
• ISBN: 1510606130; 9781510606135
• ISSN: 0277-786X
• DOI: 10.1117/12.2251972

We numerically investigate the effect of phase-amplitude coupling modulation on power spectra in semiconductor lasers subject to optical injection in a face to face configuration, when a non-negligible injection delay time is taken into account. We find that as phase-amplitude coupling factor α varies, the system goes through a sequence of phase transactions between In-phase locking states to anti-phase locking states via phase-flip bifurcation. Moreover, we observed the signature of frequency discretization (Frequency Island) and uncovered the physical mechanism for the existence of multi-stability near the phase transitions regimes. Within the windows between successive anti-phases to in-phase locking regions, optical injection induced modulation in alpha, unveiling a remarkable universal feature in the various dynamics of coupled lasers system which could be useful in controlling the chirp or pulse repetition rate of a photonic integrated compact device with the aid of phase control.