Polarization evolution of vector wave amplitudes in twisted fibers pumped by single and paired pulses

Almanee, M.; Haus, Joseph W.; Armas-Rivera, I.; Beltrán-Pérez, G.; Ibarra-Escamilla, B.; Durán-Sánchez, M.; Álvarez-Tamayo, R. I.; Kuzin, E. A.; Bracamontes-Rodríguez, Y. E.; Pottiez, O.

doi:10.1364/ol.41.004927

Cited by 12 publications

(5 citation statements)

References 13 publications

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“…Hence, nonlinear effects integrate over much longer lengths of fibre, allowing SC generation even in fibres whose nonlinear and dispersive properties are not optimized for this purpose, as it will be observed in the present work. Spectral broadening in such media could also be strongly enhanced by the nonlinear interaction between the NLP components (inner sub-pulses); although the underlying physical mechanisms are not clear at this stage, the effects of pulse interaction were illustrated in a recent experimental work [22], in which the spectrum produced by a pair of pulses after travelling through a segment of conventional fibre was much broader than a single pulse. Another advantage of NLPs is a high energy per pulse, up to 100s of nJ (~1000 times that of a soliton) [23][24][25], because a NLP is not a simple pulse but a large bunch of radiation.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of supercontinuum generation using standard and high-nonlinearity fibres pumped by noise-like pulses

Lauterio-Cruz

Pottiez

Bracamontes-Rodríguez

et al. 2017

Laser Phys.

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We present a systematic experimental study of supercontinuum (SC) spectra produced by propagating noise-like pulses (NLPs) from an erbium-doped figure-eight laser through sections of different lengths of standard single-mode fibre (SMF) and of high-nonlinearity fibre (HNLF), as well as their combinations. With an average input power that does not exceed 35 mW, very broad and smooth SC spectra extending over several hundreds of nm are typically observed, even when only SMF is used. However, maximal broadening and flatness are obtained through a section of about 300 m of SMF followed by 50 m of HNLF; the spectrum then spans from ~1260 nm up to ~2070 nm, with a bandwidth of 431 nm at 5.7 dB from the maximum (over 800 nm at 20 dB). Our analysis indicates that nonlinear processes are still operating even after propagation through several hundreds of meters of fibre, extending and flattening the spectrum, its maximal bandwidth being eventually limited by the strong fibre attenuation in the 2 µm region.

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Section: Introductionmentioning

confidence: 99%

Comparative study of supercontinuum generation using standard and high-nonlinearity fibres pumped by noise-like pulses

Lauterio-Cruz

Pottiez

Bracamontes-Rodríguez

et al. 2017

Laser Phys.

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“…A delay line is used as a non-linear and dispersive media where the non-linear and dispersive effects interact to generate different types of dynamics in the function of different parameters as the nonlinearity, dispersion, length, pump power, and polarization of the light [17]. To ensure the total polarization control in the cavity, and therefore the NPR effect, the delay line is commonly a twist conventional SMF fiber [19]. The twisted fiber in the cavity is used to maintain constant ellipticity during propagation.…”

Section: Theoretical Modelmentioning

confidence: 99%

Numerical study of the polarization proprieties in a ring cavity with total polarization control

Morales

Armas-Rivera

Durán-Sánchez

et al. 2021

Supl. Rev. Mex. Fis.

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We report the numerical study of the polarization properties of a net anomalous dispersion ring cavity with total polarization control. As a mode locker, we use the nonlinear polarization rotation (NPR) method. The initial ellipticity and azimuth were fixed to 13° and 0°, respectively. The simulations, made by the split-step Fourier method, show changes in polarization with respect to initial conditions, after the mode-lock process such as previously reported in the literature. It was found that polarization changes are caused by non-linear birefringence. The pulsed laser produces solitonic pulses with 0.4 ps FWHM and 240 W peak power.

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“…Twisted fibre operates in a way similar to an isotropic fibre [50], although it also introduces circular birefringence (thus causing a rotation of the ellipse) and a group velocity mismatch between circular right and left polarization components. This mismatch is small however, ranging as ~0.3 fs m −1 for a twist rate of 5 turns m −1 [51,52]. The same value for the nonlinear Kerr coefficient, γ = 1.5/W/ km (corre sponding to standard telecom fibre), is taken for all sections of fibre.…”

Section: Laser Setup and Numerical Modelmentioning

confidence: 99%

Numerical study of multiple noise-like pulsing in a dispersion-managed figure-eight fibre laser

Pottiez

Bracamontes-Rodríguez

Ibarra-Villalón

et al. 2018

Laser Phys.

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We study numerically noise-like pulsing in a long passively mode-locked figure-eight fibre laser with a polarization-imbalanced nonlinear optical loop mirror (NOLM) and a strong dispersion map. Contrary to the common scenario where a single noise-like pulse develops, it is found that multiple small bunches tend to form in the cavity, sharing roughly the same characteristics, which are determined by the dispersion parameters. The wave packets are subject to ample periodic variations of their duration and peak intensity as they pass through sections of opposite dispersion signs, displaying a breathing dynamics analogous to the one undergone by solitons in stretched-pulse fibre lasers. Multiple noise-like pulsing operation can be understood by considering the strong compression and corresponding intensity increase of small bunches as they travel through the NOLM, which yields higher transmission through the NOLM and thus smaller cavity losses for these small units than for larger wave packets. The present results could serve as a basis for a deeper study of the dynamics taking place in partially mode-locked fibre sources, which is particularly complex when multiple bunches of radiation coexist and interact in the cavity.

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Polarization evolution of vector wave amplitudes in twisted fibers pumped by single and paired pulses

Cited by 12 publications

References 13 publications

Comparative study of supercontinuum generation using standard and high-nonlinearity fibres pumped by noise-like pulses

Comparative study of supercontinuum generation using standard and high-nonlinearity fibres pumped by noise-like pulses

Numerical study of the polarization proprieties in a ring cavity with total polarization control

Numerical study of multiple noise-like pulsing in a dispersion-managed figure-eight fibre laser

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