Theoretical analysis of supercontinuum generation in a highly birefringent D-shaped microstructured optical fiber

Martins, Emiliano R.; Spadoti, Danilo H.; Romero, Murilo A.; Borges, Ben‐Hur V.

doi:10.1364/oe.15.014335

Cited by 33 publications

(26 citation statements)

References 42 publications

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“…Note that the same characteristics could be obtained by rotating the input signal polarization by . The numerical results were obtained using the split-step approach to solve a set of two coupled generalized Nonlinear Schrödinger Equations (NLSEs) for the two orthogonal polarization components [26,27] for pulse propagation through the HNLF, which was not assumed to be randomly birefringent along the fiber length as a first approximation [28]. As expected, at high powers, the generated idler and the signal have similar powers and the optimum angle becomes or, implying that the PA-PSA power requirements resemble those of a conventional vector PSA.…”

Section: Polarization Assisted Psa Operating Principlementioning

confidence: 99%

Polarization-Assisted Phase-Sensitive Processor

Parmigiani

Hesketh

Slavı́k

et al. 2015

J. Lightwave Technol.

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Abstract-We propose and experimentally demonstrate a phase sensitive optical processor, capable of generating two co-directional and phase shifted phase sensitive amplifiers (PSAs) in a single device. Phase-sensitive operation is obtained by polarization mixing a phase-locked signal/idler pair generated in a degenerate dual-pump vector parametric amplifier based on four-wave mixing (FWM) in a highly nonlinear fiber (HNLF). We refer to this configuration as a polarization assisted PSA (PA-PSA) and demonstrate some of the applications that it may find. Firstly, we experimentally demonstrate the regeneration of a binary phase shift keying (BPSK) signal in a system that requires only a very low nonlinear phase shift (NPS) of 0.35 rad. Secondly, we decompose a quadrature phase shift keying (QPSK) signal into its in-phase and quadrature components. Whilst application to a QPSK signal is shown in our demonstration we demonstrate numerically that any complex modulation format signal can be decomposed using this approach. Finally, we use our processor to regenerate QPSK signals in a single non-linear device.Index Terms-Four wave mixing, nonlinear optics, phase sensitive amplifiers. I. INTRODUCTIONBoth phase insensitive and phase sensitive (PS) FWM schemes are often used as the basis for achieving optical processing of spectrally efficient modulation formats, which utilize both the phase and amplitude of the optical carrier. Some processing applications that have already been demonstrated include wavelength conversion [1][2][3][4][5][6][7], phase regeneration [8][9][10][11][12][13], electric field decomposition of phase shift keying (PSK) signals [14][15][16] and analogue-to-digital conversion (ADC) [17]. Single-and dual-pump configurations with the signal, idler and pump(s) being aligned either along the same polarization axis (scalar schemes) or on different polarization axes (vector schemes) and either non-degenerate or degenerate configurations (with the signal and idler being at either different or the same frequency, respectively) have been demonstrated [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In many of the applications above, for example, both PSA-based regeneration of BPSK signals and electric field decomposition of, in principle, any advanced modulation format require an ideal binary step-like phase response. This is usually achieved by generating a complex conjugate copy (idler) of the signal through PS-FWM, and coherently adding the two together. The relative strength of the two waves determines the phase sensitive extinction ratio, PSER (defined as the difference between the maximum PS gain and the maximum PS de-amplification), and in turn the steepness of the steps in the phase response. For an ideal steplike response, the two components should have identical power [8][9]. Indeed, to generate phase conjugated copies of similar signal strength a large non-linear interaction is needed, requiring for example, Watt-level pump powers in a HNLF.It would be more energy-and cost-efficient, however, ...

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Section: Polarization Assisted Psa Operating Principlementioning

confidence: 99%

Polarization-Assisted Phase-Sensitive Processor

Parmigiani

Hesketh

Slavı́k

et al. 2015

J. Lightwave Technol.

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“…As the fibre diameter is increased though, as required for example to increase the SC power spectral density without destroying the fibre, the fibre starts to support multiple modes. Previous theoretical models were usually restricted to two polarisation modes of a birefringent fibre (Agrawal, 2001;Coen et al, 2002;Lehtonen et al, 2003;Martins et al, 2007) or included a maximum of two spatially distinct modes (Dudley et al, 2002;Lesvigne et al, 2007;Tonello et al, 2006). Using the full MM-NLSE, however, fibres with arbitrary modal contents can be studied, for which a rich new list of intermodal nonlinear phenomena emerges, causing the transfer of nonlinear phase and/or power between selected combinations of modes .…”

Section: Supercontinuum Generation In Multimode Fibresmentioning

confidence: 99%

Multimode Nonlinear Fibre Optics: Theory and Applications

Horák¹,

Poletti²

2012

Recent Progress in Optical Fiber Research

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“…I N HIGHLY birefringent fibers, propagation of two eigen-polarization modes has led to the controlling and enriching nonlinear effects by tuning pulse polarization [1]- [5]. In silicon waveguides, enhancing the performance of most waveguide-based devices is also possible by two methods; (i) tailoring waveguide orientation (due to the anisotropy of third-order Kerr nonlinearities in silicon) and (ii) tuning pulse polarization [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

A Silicon Waveguide for Tailoring Dispersion of Transverse Electric and Magnetic Modes

Jafari

Emami

2014

IEEE Photon. Technol. Lett.

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A novel silicon waveguide structure is proposed that provides simultaneous dispersion engineering for both transverseelectric (TE) and transverse-magnetic (TM) modes. There is a dispersion of approximately ± 250 ps/(nm·km) over a 1404-nm and a 904-nm bandwidth for the fundamental quasi-TM and quasi-TE modes, respectively. The nonlinear parameters of the modes and the group velocity mismatch are also studied for an optimum structure. It is explained that mode coupling is feasible before the temporal separation of the modes occurs and that it can be enhanced due to the reduced dispersion of the modes. Enhanced mode coupling and the different dispersion properties of the modes can be utilized for enriching and controlling nonlinear effects. Therefore, this waveguide can ensure efficient implementation of photonic functions based on polarization effects.

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Theoretical analysis of supercontinuum generation in a highly birefringent D-shaped microstructured optical fiber

Cited by 33 publications

References 42 publications

Polarization-Assisted Phase-Sensitive Processor

Polarization-Assisted Phase-Sensitive Processor

Multimode Nonlinear Fibre Optics: Theory and Applications

A Silicon Waveguide for Tailoring Dispersion of Transverse Electric and Magnetic Modes

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