Slow and fast light via two-wave mixing in erbium-doped fibers with saturable absorption

Stepanov, S.; Sánchez, Marcos Plata

doi:10.1103/physreva.80.053830

Cited by 18 publications

(5 citation statements)

References 10 publications

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“…Note that, for the highly doped fiber, a small transmission peak asymmetry is measured [see Fig. 4(b)], which could be attributed to a small phase contribution to the recording grating [11]. This small phase contribution will be further investigated elsewhere.…”

Section: (C)mentioning

confidence: 90%

Dynamic population gratings in highly doped erbium fibers

et al. 2011

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The efficiency of the dynamic population gratings recorded in highly doped erbium fibers has been studied. We find that the grating response increases with optical density, although the presence of erbium ion pairs in fibers with ion density of the order of 6:3 × 10 25 m −3 degrades the grating efficiency. The experimental results have been reproduced including inhomogeneous upconversion processes in the nonlinear coupled-wave equations.

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Section: (C)mentioning

confidence: 90%

Dynamic population gratings in highly doped erbium fibers

et al. 2011

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“…In the same way as equations ( 11) and ( 12) for the normalized amplitudes of population gratings were obtained from equations ( 9) and (10), one can obtain from equations ( 13) and ( 14) the following population grating amplitudes:…”

Section: Active Ions With Reduced Anisotropymentioning

confidence: 99%

“…Dynamic population gratings recorded via local saturation of the optical absorption or gain in maxima of the interference pattern of two mutually coherent optical waves counter-propagating in the rare-earth-doped fibers [1,2] can have different promising applications. In particular, their utilization in tunable extra-narrow-band optical fiber filters [3,4], singlefrequency fiber lasers [5][6][7], different configurations of adaptive interferometers [8,9], and slow/fast light propagation [10,11] via two-wave mixing (TWM) were demonstrated. Characteristic rate of the recording/erasure of these gratings is governed by the life-time of the active ion metastable state (about 10 ms [12] in erbium-doped fiber (EDF) and about 1 ms [13] in ytterbium-doped fiber) and usually grows with the recording light power in the 1-10 mW region [2].…”

Section: Introductionmentioning

confidence: 99%

Population gratings in saturable optical fibers with randomly oriented rare-earth ions

Stepanov

Martínez

Hernández

et al. 2015

J. Opt.

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Formation of the dynamic population gratings in optical fibers with randomly oriented rare-earth ions is analyzed with a special interest to the grating component for readout with the orthogonal light polarization. It is shown that as compared with a simple model case of the collinearly oriented dipole-like centers their random orientation leads to approximately 2-times growth of the effective saturation power P sat when it is estimated from the incident power dependence of the fiber absorption or from that of the fluorescence intensity. An optimal incident power, for which the maximum of the dynamic population grating amplitude for collinear light polarization is observed, also follows this change in P sat , while formation of the grating for orthogonal polarization needs essentially higher light power. The reduced anisotropy of the active centers, which is in charge of the experimentally observed weakening of the polarization hole burning (PHB) and of the fluorescence polarization, compensates in some way the effect of random ion orientation. The ratio between the maximum conventional (i.e. for the interacting waves collinear polarizations) two-wave mixing (TWM) amplitude and the initial not saturable fiber optical density proves to be, however, nearly the same as in the model case of collinearly oriented dipoles. The ratio between the PHB effect and the amplitude of the anisotropic grating, which is responsible for TWM of the orthogonally polarized waves, is also not influenced significantly by the reduced anisotropy of ions.

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“…On the other hand, the fiber-based configurations usually need sub-mW cw laser power and can be considered as a very useful and flexible model media for fundamental investigations of the laser pulse propagation in the saturable absorption/gain materials. In particular, two original methods to control the light pulses propagations utilizing auxiliary synchronized light pulses [10] and two-wave mixing (TWM) [11] were recently demonstrated in EDF, and one can wait for a future extension of these techniques to the semiconductor amplifiers.…”

Section: Introductionmentioning

confidence: 99%

Observation of slow light propagation in saturable erbium doped fiber via transient fluorescence at the fiber side

2011

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Erbium-doper fiber (EDF) is a flexible and promising model medium for investigation of the slow/fast light propagation in saturable optical materials. The experiments are usually performed in the spectral range 1480-1570 nm of the absorption/gain of Er 3+ ions using the input power of a sub-mW scale. Conventional experimental configuration allows one to observe, however, the input and the output pulse profiles only. We report an original nondestructive technique for observation of a spatial propagation of the pulses via observation of the transient fluorescence excited by the propagating light-pulses at the fiber side, from which we are able to reconstruct how does the fractional delay and the amplitude of the propagating pulses change along the fiber. Results of a numerical simulation of the nonlinear pulse propagation performed for a saturable two-level medium in low contrast approximation proved to be in a reasonable agreement with the experimental observations.

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Slow and fast light via two-wave mixing in erbium-doped fibers with saturable absorption

Cited by 18 publications

References 10 publications

Dynamic population gratings in highly doped erbium fibers

Dynamic population gratings in highly doped erbium fibers

Population gratings in saturable optical fibers with randomly oriented rare-earth ions

Observation of slow light propagation in saturable erbium doped fiber via transient fluorescence at the fiber side

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