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Experimental observation of two-state on-off intermittency
A N Pisarchik1, V J Pinto-Robledo
1Centro de Investigaciones en Optica, A.C., Loma del Bosque, 115, Col. Lomas del Campestre, 37150 Leon, Guanajuato, Mexico. apisarch@cio.mx
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 21, 2002
Summary
Researchers experimentally observed two-state on-off intermittency in a diode laser with an external cavity. This intermittent behavior transitions between chaotic and single-mode states, with power-law scaling noted in laminar times.
Area of Science:
- Nonlinear Dynamics
- Laser Physics
- Experimental Physics
Background:
- Diode lasers with external cavities are complex systems exhibiting rich dynamical behaviors.
- Understanding intermittency is crucial for controlling laser output and predicting system transitions.
Purpose of the Study:
- To experimentally investigate the two-state on-off intermittency in a modulated external cavity diode laser.
- To analyze the transition dynamics between chaotic and single-mode states.
Main Methods:
- Experimental setup involving a diode laser with a periodically modulated external cavity.
- Control parameter: modulation of the external cavity length.
- Analysis of system behavior near a bifurcation point.
Main Results:
- Observed clear two-state on-off intermittency in the diode laser system.
- Demonstrated intermittent switching between a two-mode chaotic regime and a single-mode state.
- Identified power-law scaling of average laminar time with a critical exponent of -1.
Conclusions:
- The external cavity length modulation effectively induces on-off intermittency in diode lasers.
- The observed power-law scaling provides insights into the underlying mechanisms of chaotic intermittency.