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Article
Bistability
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Article
Chaotic behavior of a hybrid optical bistable system without a time delay
The observation of chaos in a hybrid optical bistable device is reported. There is no delay line in this system. An investigation of the mechanism concentrates on a somewhat simplified structure. This structur...
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Article
Intracavity resonant degenerate 4-wave mixing in atomic sodium vapor: Bistability in phase conjugation
We report on intracavity phase conjugation via resonant degenerate 4-wave mixing in atomic sodium vapor with the use of transverse optical Zeeman pum** as a versatile nonlinear mechanism. Under appropriate c...
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Article
Hard coatings for optically bistable interference filters
We have fabricated optically bistable interference filters from layers of TiO2 and SiO2 vapour deposited on glass substrates. An experimental comparison with the more conventional ZnSe filters is presented. Our d...
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Article
Analysis of optical bistability through rapid water desorption from hard coatings
The mechanism of optical bistability in TiO2/SiO2 nonlinear interference filters is investigated and found to be due to water sorption in the pores of the material.
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Complexity out of a simple structure: The intricate multistable behaviour of an optical resonator filled with sodium atoms
A Fabry-Perot resonator containing sodium atoms displays a variety of switching phenomena even in the simplified case of homogeneous broadening. The processes are shown to arise from the combined effects of Ze...
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On the detection of deterministic structures in irregular signals
The recently proposed method of surrogate data gives a quantitative criterion for the decision whether a signal is either deterministically chaotic or stochastic. We apply this technique to both numerical and ...
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Additive pulse mode-locked Nd: YAG laser
Additive pulse mode locking applied to lamppumped Nd: YAG lasers results in an attractive source of picosecond pulses at 1.06 μm or 1.32 μm with average powers at the Watt level. We provide detailed informatio...
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Article
Velocity of pulse propagation in media with amplitude nonlinearity
The propagation velocity of optical wave fronts can be accelerated by the influence of gain saturation. We report systematic measurements for the specific case of Brillouin gain in optical fibers. A simplified...
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Article
On the pulse width of synchronously pumped lasers
The pulse width of a synchronously pumped laser chiefly depends on the available cavity bandwidth and the pump-pulse duration. A functional form of this dependence was suggested in the literature. We present a...
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Article
Longitudinal structure formation in a nonlinear resonator
A fiber ring resonator, synchronously driven by picosecond pulses, exhibits a spatiotemporal instability. A rapid modulation in the pulse envelope is spontaneously formed and evolves dynamically. This structur...
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Systematic evaluation and prediction of the pulse width of synchronously pumped lasers
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Self-stabilizing additive-pulse mode-locking due to thermo-optical non-linearity in an optical fiber
, 1671 (1991)] described a Nd:YLF APM laser which somehow automatically adjusted the relative resonator phase. We reproduce this behavior and analyse its origin. Thermal effects due to the light power guided i...
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Article
Superluminal pulse propagation in an erbium fiber laser
It is well known that saturating gain media can give rise to superluminal pulse propagation velocity. In most mode-locked lasers the effect is unmeasurably small and has not yet been directly demonstrated. We ...
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Manipulation of soliton ensembles by spectral filters
It was shown recently that an ensemble of solitons can be created in a driven optical fiber resonator. The ensemble can exist in either an ordered or a disordered state; these have been referred to as soliton ...
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Role of field losses on the Risken–Nummedal–Graham–Haken laser instability: application to erbium-doped fibre lasers
We analyse the effect of both distributed and localised losses in a laser cavity on the Risken–Nummedal–Graham–Haken multimode instability. For two-level lasers, distributed losses are found to have a negligib...
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Experimental investigation of Risken–Nummedal–Graham–Haken laser instability in fiber ring lasers
It has been suggested (by Pessina et al. in 1997) that the observed spontaneous mode beating of erbium-doped-fiber ring lasers can be explained as the multimode instability described in 1968 by Risken and Numm...
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Article
Soliton propagation in a dispersion map with deviation from periodicity
Solitons in dispersion-managed fibers are a particular case of a periodically perturbed nonlinear system. Since in practice random deviations from strict periodicity of the dispersion alternation are unavoidab...
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Soliton content of arbitrarily shaped light pulses in fibers analysed using a soliton-radiation beat pattern
Arbitrarily shaped light pulses propagating down a fiber may contain one or several solitons and a radiative background. A novel computer-assisted method is introduced to identify the composition. This techniq...
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Article
A useful approximation for the cladding index of holey fibers
We present a simplified quantitative description of the effective refractive index of the cladding region in holey fibers. Our approximation is based on a smooth interpolation between two limiting cases. It re...