Dimensions and entropies of chaotic intensity pulsations in a single-mode far-infrared NH sub 3 laser

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Physical Review (Section) A: General Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevA.40.6354· OSTI ID:7070769

Hubner, U; Abraham, N B; Weiss, C O ^[1]

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1. Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-3300 Braunschweig, Federal Republic of Germany (DE)

Detailed studies of digitized recordings of periodic and chaotic intensity pulsing of an unidirectional far-infrared NH{sub 3} ring laser at 81.5 {mu}m reveal common features of a broad range of different pulsing patterns as well as systematic relationships among entropies, dimensions, and decay rates of the autocorrelation function. Spiral-type Lorenz-like'' chaos of many different spiraling rates and of differing modulation depths has an underlying attractor dimension of 2.0--2.3 and an entropy rate that lies mainly in the range (0.2--0.7){ital T}{sup {minus}1}, where {ital T} is the average intensity pulsing period. Over a wide range of types of pulsing (spiral chaos, period-doubling chaos, and periodic states) the decay rate of the envelope of the autocorrelation function over short times provides an estimator of the entropy. The results are in excellent agreement with the characteristics of the Lorenz-Haken model for similar operating parameters.

• OSTI ID: 7070769
• Journal Information: Physical Review (Section) A: General Physics; (USA), Journal Name: Physical Review (Section) A: General Physics; (USA) Vol. 40:11; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
AMMONIA
ELECTROMAGNETIC RADIATION
ENTROPY
FAR INFRARED RADIATION
FLUCTUATIONS
GAS LASERS
HYDRIDES
HYDROGEN COMPOUNDS
INFRARED RADIATION
LASERS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PHYSICAL PROPERTIES
PULSATIONS
RADIATIONS
RING LASERS
THERMODYNAMIC PROPERTIES
VARIATIONS