Instabilities in a laser-diode-pumped microchip solid-state laser with feedback

Abstract
Random chaotic relaxation oscillation burst generations have been observed in laser-diode-pumped microchip multimode lasers coupled to a single-mode optical fiber. Dynamical characterizations have been carried out by the singular value decomposition method and the joint time-frequency analysis, and the observed instability has been identified to be a random switching between stable and chaotic operation.