Linear and nonlinear resonance features of an erbium-doped fibre ring laser under cavity-loss modulation

Ghosh, Anil C.; Vijaya, R.

doi:10.1007/s12043-014-0770-1

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…When the natural frequency is a fraction of the modulation frequency, a sub-harmonic resonance is obtained at 26 kHz. For the pumping ratio used here, it is noticed that the fundamental resonance frequency (11.6 kHz) for Vpp=10 mV is slightly lower than the ROF (12.3 kHz) [16]. On increase in Vpp to 20 mV, the fundamental, sub-and super-harmonic resonances are observed near 10.6 kHz, 25.1 kHz and 6.8 kHz respectively, with all the three resonance frequencies being shifted towards the lower frequency side.…”

Section: Nonlinear Regime Of Oscillationmentioning

confidence: 76%

“…An extensive body of literature exists on pumpmodulated EDFL [7,[10][11][12][13] and to a lesser extent on lossmodulated EDFL [14][15][16][17]. Pump-modulated EDFL has received more attention stemming from the fact that semiconductor lasers that pump them could be modulated very easily and as a result the pump-modulated EDFL could reveal chaotic features at very high frequencies (GHz) which has very specialized applications [18].…”

Section: Introductionmentioning

confidence: 99%

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Dynamical features of loss and pump modulation in an erbium-doped fibre ring laser

Kumar

Vijaya

2015

J. Opt.

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Resonance characteristics, chaotic dynamics and bistable response of the erbium-doped fibre ring laser (EDFRL) are studied in an experiment under cavity-loss modulation at frequencies in the range of 1–35 kHz. With an increase in pumping ratio and modulation index, the resonance frequencies of the ring cavity laser change in agreement with the expectations from the model. A comparison with the calculated results of the pump-modulated laser helps to bring out the differences in the two modulation schemes. The loss-modulated laser is found to be more sensitive in the sub-harmonic range to its dynamical state while the pump-modulated laser is more sensitive in the super-harmonic range. To achieve chaos, pump modulation requires high values of modulation index (∼28%) while it is seen even at very low values (<1%) in loss modulation. Even though both the schemes follow the same period-doubling route to chaos, features such as the presence of bifurcations or chaos at the resonance frequencies are quite different. Loss modulation is more suited to study the chaotic features in EDFRL due to the range of available control parameters. By comparing the strange attractors and Lyapunov exponents of both cases, it is found that the quality of chaos is better in loss modulation.

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Section: Nonlinear Regime Of Oscillationmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Dynamical features of loss and pump modulation in an erbium-doped fibre ring laser

Kumar

Vijaya

2015

J. Opt.

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“…To push it into the nonlinear domain, some external perturbation is required. Nonlinear dynamics in fibre lasers can be achieved by various methods such as pump modulation [5][6][7][8][9], loss modulation [1,[10][11][12][13] and controlled feedback [14]. In the ring cavity configuration, the laser output can be tailored by inserting different components such as attenuators, couplers, filters and modulators into the cavity.…”

Section: Introductionmentioning

confidence: 99%