
Accession Number : ADP006800
Title : Instabilities in Coupled Photorefractive Ring Cavities and SelfPumped Phase Conjugators,
Corporate Author : NATIONAL CHIAO TUNG UNIV HSINCHU (TAIWAN)
Personal Author(s) : Dai, LiKuo ; Gou, YihShuh ; Gu, Claire ; Yeh, Pochi
Report Date : 22 MAY 1992
Pagination or Media Count : 4
Abstract : Photorefractive mode coupling between resonators provides a simple model for selfpumped phase conjugators where instabilities may occur due to energy transfer between different oscillation modes inside the crystal. In this paper, we consider the dynamical behaviors of mode coupling between two unidirectional ring resonators. The first resonator is driven by an external laser beam via photorefractive twowave mixing. The internal oscillating beam is then employed to drive the second ring resonator via the same mechanism. The dynamics of the coupled system is described by a set of spatialtemporal equations with appropriate boundary conditions. To investigate the instability behaviors, we use the meanfield approximation to simplify the transient analysis. We first solve for the steady states of the system. When the gain of the two cavities are below certain threshold, there is no selfoscillation in the system. If the gain for the primary cavity is increased above its threshold while the gain for the secondary cavity remains low, selfoscillation will occur in the primary cavity only. If the gain in the secondary cavity is gradually increased, selfoscillation will occur in the secondary cavity.
Descriptors : *RESONATORS, BOUNDARIES, CAVITIES, COUPLINGS, CRYSTALS, DRIVES, DYNAMICS, ENERGY TRANSFER, EXTERNAL, GAIN, INSTABILITY, INTERNAL, LASER BEAMS, LASERS, MEAN, MIXING, MODELS, OSCILLATION, RINGS, TRANSFER, UNIDIRECTIONAL, REFRACTION, SYMPOSIA.
Subject Categories : Optics
Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE