Effect of Waveguide Inhomogeneity in a χ(2)-Based Pulsed Optical Parametric Amplifier

Nouroozi, Rahman

doi:10.1109/jlt.2017.2653181

Cited by 8 publications

(13 citation statements)

References 21 publications

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“…This spectrum is the critical parameter in the case of many quantum system, such as the quantum pulse gate [7]; furthermore the quality of the spectrum is directly related to the efficiency [8]. Therefore, in the past decades, several studies have discussed the relation between fabrication errors in waveguides [9,10,11,12,13,14,15,8] and in fibres [16,17,18,19] and their spectral performance.…”

Section: Introductionmentioning

confidence: 99%

General framework for the analysis of imperfections in nonlinear systems

Santandrea¹,

Stefszky²,

Silberhorn³

2019

Opt. Lett.

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In this paper, we derive a framework to understand the effect of imperfections on the phasematching spectrum of a wide class of nonlinear systems. We show that this framework is applicable to many physical systems, such as waveguides or fibres. Furthermore, this treatment reveals that the product of the system length and the magnitude of the imperfections completely determines the phasematching properties of these systems, thus offering a general rule for system design. Additionally, our framework provides a simple method to compare the performance of a wide range of nonlinear systems.

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Section: Introductionmentioning

confidence: 99%

General framework for the analysis of imperfections in nonlinear systems

Santandrea¹,

Stefszky²,

Silberhorn³

2019

Opt. Lett.

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“…12 During this length (L wo ), co-propagating pulses have an amount of temporal overlap within desired nonlinear interaction can be occurred. It is worth mentioning that, for optical waveguides presented in this study, the overall evolution of interacting pulses is studied via their temporal tracing 11 .…”

Section: Second Harmonic Generationmentioning

confidence: 99%

“…However, many factors cause their imperfect formation which leads to non-efficient wavelength conversion in both continuous wave (CW) and pulsed regime. Among such factors, the thermal effects during the fabrication process 11 and the penetration depth of the induced static electric field for grating formation are the main obstacles to achieve appropriate homogeneity in PPLN waveguides. Although a specific type of waveguide inhomogeneity in a cascaded second harmonic generation/difference frequency generation (cSHG/DFG) has been studied in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Although a specific type of waveguide inhomogeneity in a cascaded second harmonic generation/difference frequency generation (cSHG/DFG) has been studied in Ref. 11 , but many different types of imperfections can be occurred during the formation and operation of PPLN optical waveguides. Therefore, having a comprehensive vision of the waveguide inhomogeneity effect in the pulsed wavelength conversion performance is crucial in nonlinear photonics.…”

Section: Introductionmentioning

confidence: 99%

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Pulse distortion caused by waveguide inhomogeneity in nonlinear optical wavelength converters

Nouroozi

Paygan

Izadi

et al. 2022

Preprint

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Low-noise integrated all-optical wavelength converters that can be operated in short pulse regime are essential tools too vercome contention resolution in a modern communication network, based on wavelength division multiplexing. Any imperfect functionality in such devices causes non-ideal optical power transfer to the converted data pulses. All imperfections during the preparation and operation of the wavelength converters can be addressed to the waveguide inhomogeneity which distorts data pulses to be converted. This paper reports different waveguide inhomogeneity effects on the pulse distortion while using periodically poled lithium niobate waveguide as wavelength converters. Three types of χ(2)-based nonlinear optical processes, including second harmonic generation, difference frequency generation, and cascaded second harmonic generation/difference frequency generation are numerically studied to show that any constant, linear, and quadratic waveguide inhomogeneity causes short pulse (down to 1 ns) distortion in such wavelength converters. In addition, it is shown that the reconstruction of sech2-shaped generated pulses is possible, when suitable upside-down quadratic variations of obtained inhomogeneityare deliberately induced in the waveguide. Notably, for pulsed second harmonic generation, the generated pulse can be compressed using an upside-down quadratic phase mismatch.

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“…The nonlinear interaction to amplify and enhance the propagation length of SPPs is difference frequency generation (DFG) in a χ (2) nonlinear substrate 14 . Among a wide range of χ (2) -based nonlinear optical materials, lithium niobate (LN) is the most widely used substrate to study DFG-based optical parametric amplification (OPA) 15 , 16 . Some prominent properties of LN include: a) having a large second order nonlinear coefficient ( d 33 ), b) transparency over a wide range of frequencies around communication band, c) ferroelectric behavior, d) fast optical response, e) small absorption coefficient and f) low spontaneous emission noise.…”

Section: Introductionmentioning

confidence: 99%

Adjustable Propagation Length Enhancement of the Surface Plasmon Polariton Wave via Phase Sensitive Optical Parametric Amplification

Izadi

Nouroozi

2018

Sci Rep

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The adjustable propagation length enhancement of the surface plasmon polariton (SPP) mode under the effects of the initial relative phase (ψ0) between interacting waves in difference frequency generation (DFG) based optical parametric amplification (OPA) are numerically considered. The waveguide is a silver coated PPLN planar waveguide. Obtained results indicate ultra long propagation length for the SPP mode could be achieved via manipulation of ψ0 in exact quasi phase matching (QPM) case up to 30 mm for initial pump intensity about 66 MW/cm for degenerate DFG (dDFG). For chirped QPM by mitigating the high depletion of the pump intensity, it is possible to enhance the SPP propagation length up to 43 mm for initial pump intensity about 135 MW/cm. In this case ψ0 does not affect the SPP propagation length except around a narrow range of unsuitable phases. The unsuitable phase is for exact QPM but is pump dependent for chirped QPM case. Using this unsuitable phase is the key parameter to the SPP propagation length enhancement via controlling ψ0. In this case with a high pump intensity, the pump and the SPP modes interact at longer distances which leads to the SPP propagation length enhancement.

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Effect of Waveguide Inhomogeneity in a χ(2)-Based Pulsed Optical Parametric Amplifier

Cited by 8 publications

References 21 publications

General framework for the analysis of imperfections in nonlinear systems

General framework for the analysis of imperfections in nonlinear systems

Pulse distortion caused by waveguide inhomogeneity in nonlinear optical wavelength converters

Adjustable Propagation Length Enhancement of the Surface Plasmon Polariton Wave via Phase Sensitive Optical Parametric Amplification

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