Low-Frequency Chaos in Semiconductor Lasers with External Feedback

Abstract

Sciiiiconductor diode lasers subject to external optical phase-conjugate feedback exhibit beh;ivior which can differ radically from the cffects of conventional optical feedback. Some of thcsc dilferences were reviewed for the case of a single-longitudinal mode semiconductor lascr [ 1 ). When the semiconductor laser oscillates in mullipte longitudinal modes, phase conjugetc feedback obtained through four-wave mixing can lead to mode locking and short-pulse