Effects of intrapulse stimulated Raman scattering and intermodal dispersion on short pulse propagation in a nonlinear two-core PCF coupler

Liu, M.; Chen, Y.; Wang, D.

doi:10.1134/s0021364010100024

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…However, this theoretical concept has never been demonstrated experimentally, because the soliton-like pulses in fibres are exposed to various distortions, mainly due to third order dispersion (TOD) and stimulated Raman scattering (SRS). Moreover the coupling coefficient dispersion causes additional pulse brake-up in the case of dual-core fibres [9,10]. On the other hand, when we move from the weak nonlinearity to the strong nonlinearity regime, it is possible to avoid these drawbacks.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

All-optical switching based on soliton self-trapping in dual-core high-contrast optical fibre

Longobucco

Cimek

Curilla³

et al. 2019

Optical Fiber Technology

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A systematic numerical study of ultrafast nonlinear directional coupler performance based on soliton selftrapping in a novel type of dual-core optical fibre is presented. The considered highly nonlinear fibre structure is composed of a real, intentionally developed soft glass-pair with high refractive index contrast at the level of 0.4 in the near infrared. Nonlinear propagation of picojoule level femtosecond pulses was studied numerically with the aim to identify the best switching performance in input parameter space of 1400 -1800 nm in terms of excitation wavelengths, and of 75 -150 fs in terms of pulse width, respectively. For every combination of excitation wavelength and pulse width, the switching energies together with the optimal fibre length were determined and their relation to the input and switching parameters is discussed. The highest switching contrast of 46 dB in the time window of the ultrashort soliton was predicted at combination of 1500 nm excitation wavelength and 75 fs pulse width considering 43 mm fibre length. These results represent significant improvement both from point of view of switching contrast and switching energies, which are only at level of 20 pJ, in comparison to the previously published case of air-glass dual-core photonic crystal fibre. Moreover, the simpler fibre design without cladding microstructure together with the all-solid approach holds promise of improved dual-core symmetry and therefore offers high probability of the successful realization of a low power, compact and simple switching device.

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Section: Theoretical Backgroundmentioning

confidence: 99%

All-optical switching based on soliton self-trapping in dual-core high-contrast optical fibre

Longobucco

Cimek

Curilla³

et al. 2019

Optical Fiber Technology

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“…A comprehensive overview of the theory of nonlinear couplers is given in [12]. Nonlinear switching performance in DC PCF has been studied mostly theoretically by means of numerical simulations [16,17]. Experimental demonstration of nonlinear switching of femtosecond pulses at telecommunication C-band in DC PCF was performed by Betlej et al [18].…”

Section: Introductionmentioning

confidence: 99%

Soliton-based ultrafast multi-wavelength nonlinear switching in dual-core photonic crystal fibre

et al. 2014

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Systematic experimental study of ultrafast multi-wavelength all-optical switching performance in a dual-core photonic crystal fibre is presented. The focus is on nonlinearly induced switching between the two output ports at non-excitation wavelengths, which are generated during nonlinear propagation of femtosecond pulses in the anomalous dispersion region of a dual-core photonic crystal fibre made of multicomponent glass. Spatial and spectral characteristics of the fibre output radiation were measured separately for both fibre cores under various polarization and intensity conditions upon selective, individual excitation of each fibre core. Polarization-controlled nonlinear switching performance at multiple non-excitation wavelengths was demonstrated in the long-wavelength optical communication bands and beyond. Depending on the input pulse polarization, narrowband switching operation at 1560 nm and 1730 nm takes place with double core extinction ratio contrasts of 9 dB and 14.5 dB, respectively. Moreover, our approach allows switching with simultaneous wavelength shift from 1650 to 1775 nm with extinction ratio contrast larger than 18 dB. In addition, non-reciprocal behaviour of the soliton fission process under different fibre core excitations was observed and its effect on the multi-wavelength nonlinear switching performance was explained, taking into account the slight dual-core structure asymmetry. The obtained results represent ultrafast all-optical switching with an extended dimension of wavelength shift, controllable with both the input radiation intensity and the polarization by simple propagation along a 14 mm long fibre.

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“…The dual core photonic crystal fibres (DC PCF) operating in the nonlinear regime are commonly investigated as all-optical nonlinear fibre couplers. The majority of the previous papers covering these fibres [8,9] have presented mainly the theoretical results of the coupling properties of DC PCF in the case of nonlinear propagation without consideration of the spectral transformations. The theory of nonlinear couplers is well summarized in [7], where the most of theoretical analysis take into account only identical cores, i.e.…”

Section: Introductionmentioning

confidence: 99%

Spectral switching control of ultrafast pulses in dual core photonic crystal fibre

Koys

Bugár

Hrebikova

et al. 2013

J. Eur. Opt. Soc.-Rapid Publ.

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The work presented in this paper is a study of an all-optical narrow-band switch in extended spectral area by dual core photonic crystal fibre expressing nonlinear coupler performance. The investigation is focused on the nonlinear propagation of femtosecond pulses in the near infrared spectral region at up to 50 kW peak power which induces spectral broadening through almost two octaves. The mutual effect of nonlinear spectral transformation and field redistribution between the two fibre cores is analyzed by both theoretical and experimental approaches. The simulation of the nonlinear propagation is based on coupled generalized nonlinear Schrödinger equations. A modified numerical model utilizing split-step Fourier method was adapted for dual core fibres. The complex experimental study was accomplished for various input settings such as polarization, intensity and selective coupling into each core and the selective detection of spectra from each core. The presented work encompasses promising results obtained regarding a spectral intensity switch between the two output channels by input intensity or polarization change in the S-band of optical communication systems.

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Effects of intrapulse stimulated Raman scattering and intermodal dispersion on short pulse propagation in a nonlinear two-core PCF coupler

Cited by 6 publications

References 12 publications

All-optical switching based on soliton self-trapping in dual-core high-contrast optical fibre

All-optical switching based on soliton self-trapping in dual-core high-contrast optical fibre

Soliton-based ultrafast multi-wavelength nonlinear switching in dual-core photonic crystal fibre

Spectral switching control of ultrafast pulses in dual core photonic crystal fibre

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