CHINESE JOURNAL OF PHYSICS VOL. 40, NO. 3 JUNE 2002

Mode Partition Noise and Chaos: An Experimental Exploration in a Multimode Microchip Nd:YVO₄ Solid-State Laser

Jyh-Long Chern¹, Siao-Lung Hwong¹, A-Chuan Hsu¹, and Kenju Otsuka<sup>2

1</sup>Department of Physics, National Cheng Kung University, Tainan 701, Taiwan

²Department of Applied Physics, Takai University 1117, Kitakaname, Hiratsuka,

Kanagawa 259-12, Japan
(Received January 28, 2002)

Based on a singular-value-decomposition method, we used the time series of a multimode Nd:YVO₄ microchip solid state laser to explore the interplay between mode-partition noise and chaos. We experimentally show that, as chaos occurs, the noise level that of the modal output can be smaller than of the total output. In contrast, in the case of a relaxation oscillation, the common feature of mode partition noise persists, i.e., total output noise is smaller.

PACS. 42.60.Mi - Dynamical laser instabilities; noisy laser behavior.
PACS. 05.45.+b - Theory and models of chaotic systems.

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