Stabilization of Chaotic Amplitude Fluctuations in Multimode, Intracavity Ddoubled Solid-State Lasers
Abstract
Intracavity doubled solid state lasers based on Nd-doped crystals are efficient and compact sources of coherent visible optical radiation. When such lasers operate in three or more longitudinal cavity modes, irregular fluctuations of the output intensity may occur. This behavior, referred to as the green problem, has been reported for the first time by Baer. He found that these instabilities arise from a coupling of the longitudinal modes of the laser by sum-frequency generation, which occur in the intracavity-doubling crystal. When the laser does not contain the nonlinear crystal or when it operates in a single longitudinal mode, its output is stable. In the case of two oscillating longitudinal modes, output intensity of the laser is stable only for small values of nonlinearity, otherwise both modes tend to pulse on and off out of phase with each other. When the number of lasing modes is larger than two, the laser can exhibit, depending on the parameters describing it, various behaviors like: aniphase dynamics, clustering, grouping and chaotic dynamics. The main goal of this communication is to study the possibilities of a stabilization of large amplitude fluctuations in such a laser, i.e., an intracavity-doubled Nd:YAG laser. The analysis is based on the Baer-type rate equations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2000
- Accession Number
- ADP010929
Entities
People
- Monika E. Pietrzyk
Organizations
- Friedrich Schiller University Jena