Adaptive control of femtosecond pulse propagation in optical fibers

Omenetto, Fiorenzo G.; Taylor, Antoinette J.; Moores, M.D.; Reitze, D. H.

doi:10.1364/ol.26.000938

Cited by 50 publications

(19 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, up to some extent, pulse shaping techniques have demonstrated to be effective in controlling the nonlinear broadening in photonic crystal fibers [11,12] and other nonlinear materials [13][14][15], using both single-pass [15] and self-learning adaptive configurations [11][12][13][14]. Besides, these techniques offer valuable insight in understanding the pulse dynamics through propagation [11,16].…”

mentioning

confidence: 99%

Spectral broadening enhancement in silicon waveguides through pulse shaping

et al. 2012

View full text Add to dashboard Cite

Spectral broadening in silicon waveguides is usually inhibited at telecom wavelengths due to some adverse effects related to semiconductor dynamics, namely, two-photon and free-carrier absorption (FCA). In this Letter, our numerical simulations show that it is possible to achieve a significant enhancement in spectral broadening when we properly preshape the input pulse to reduce the impact of FCA on spectral broadening. Our analysis suggests that the use of input pulses with the correct skewness and power level is crucial for this achievement. © 2012 Optical Society of America OCIS codes: 130.4310, 190.4360, 190.4390. Nowadays, continuous advances in nanophotonics technologies have spurred on interest in the study of silicon-based optical materials [1]. Strong confinement of light in nanoengineered silicon-on-insulator (SOI) waveguides results in a huge effective nonlinearity and the ability for dispersion engineering (see, e.g., [2,3]). These achievements have opened up the possibility of performing previously demonstrated signal processing functionalities (mainly based in nonlinear kilometric fibers) at chip scale with relatively low optical power [4]. These Si-based components offer the benefits of low cost (complementary metal-oxide-semiconductorcompatible large-scale-fabrication processes) and low power consumption. However, at the relevant wavelength region around 1.5 μm, Kerr-based spectral broadening or self-phase modulation (SPM) is accompanied by an orchestra of different nonlinear phenomena arising from the semiconductor carrier dynamics [5][6][7]. Specifically we mention the absorption and dispersion of free carriers produced by two-photon absorption (TPA), which are not present in conventional silica-based devices. The net effect results in a depletion of the achievable spectral broadening for a Gaussian input pulse in comparison with the case when only SPM is acting [8][9][10].Additionally, the phenomenon under study is extremely sensitive to the input pulse characteristics due to the inherent nonlinear nature of the spectral broadening. In fact, up to some extent, pulse shaping techniques have demonstrated to be effective in controlling the nonlinear broadening in photonic crystal fibers [11,12] and other nonlinear materials [13][14][15], using both single-pass [15] and self-learning adaptive configurations [11][12][13][14]. Besides, these techniques offer valuable insight in understanding the pulse dynamics through propagation [11,16]. In this Letter, we show that the proper manipulation of the pulse phase enhances spectral broadening even in the presence of TPA and free-carrier absorption (FCA).Let us remind the reader that the dynamics of an optical pulse propagating in an SOI nanowaveguide can be described in mathematical terms by [9](1)where A is the electric-field envelope, ν 0 represents the carrier frequency, β 2 stands for the group velocity dispersion (GVD) parameter, n 2 is the Kerr coefficient, A eff is the effective area of the waveguide, γ 0 denotes the nonlinear coefficient of t...

show abstract

mentioning

confidence: 99%

Spectral broadening enhancement in silicon waveguides through pulse shaping

et al. 2012

View full text Add to dashboard Cite

show abstract

“…A specific version of such closed-loop search algorithms, genetic algorithms, has been successfully used in many applications other than pulse compression: optimization of laserinduced fluorescence [18], high-harmonic generation [19], molecular dynamics and photochemical reactions [20][21][22][23], etc. Recently, Omenetto et al used adaptive pulse shaping to suppress unwanted nonlinear effects [24], so that pulse propagation in fibers over long distances would not suffer from self-induced nonlinearities.…”

Section: Semi-analytical and Computational Modelsmentioning

confidence: 99%

Controlled supercontinuum generation for optimal pulse compression: a time-warp analysis of nonlinear propagation of ultra-broad-band pulses

Spanner

Pshenichnikov

Olvo³

et al. 2003

Appl Phys B

View full text Add to dashboard Cite

Citation for published version (APA): Spanner, M., Pshenichnikov, M., Olvo, N. V., & Ivanov, M. (2003). Controlled supercontinuum generation for optimal pulse compression: a time-warp analysis of nonlinear propagation of ultra-broad-band pulses. Applied Physics B-Lasers and Optics, 77(2-3), 329-336. https://doi.org/10.1007/s00340-003-1185-8 Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. ABSTRACT We describe the virtues of the pump-probe approach for controlled supercontinuum generation in nonlinear media, using the example of pulse compression by cross-phase modulation in dielectrics. Optimization of a strong (pump) pulse and a weak (probe) pulse at the input into the medium opens the route to effective control of the supercontinuum phases at the output. We present an approximate semi-analytical approach which describes nonlinear transformation of the input pulse into the output pulse. It shows how the input and the output chirps are connected via a time-warp transformation which is almost independent of the shape of the probe pulse. We then show how this transformation can be used to optimize the supercontinuum generation to produce nearly single-cycle pulses tunable from mid-infrared to ultraviolet.PACS 42.65.Re; 42.65.Ky

show abstract

“…Optical solitons have been experimentally observed and created [1]. The two most common approaches to constructing solitons are: pulse shaping at the input of the fiber to pre-compensate the effects of propagation, [9], [10] in a feed-forward manner, and dispersion management. Dispersion management acts as an open-loop regulation mechanism and uses alternating lengths of positive and negative dispersion fiber to keep the dispersion within a certain tolerance, as pictured in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

A theoretical approach to feedback control of optical soliton propagation

Koehn

Langbort

2010

Proceedings of the 2010 American Control Conference

View full text Add to dashboard Cite

Feedback control is applied to the problem of propagating ultra-short pulse width solitons in optical fibers. Assuming that fiber dispersion can be tuned quickly and continuously, a full-state feedback control law is derived, which achieves propagation of Gaussian solitons of any desired width and chirp. This is in contrast with traditional, open-loop, dispersion management. In this paper, a variational model is used for control design, and two cases -zero and non-zero chirp -are considered. In the first case, a stable fixed point is created in closed-loop; in the second, a controlled Hopf bifurcation creates a stable limit cycle. These control laws are simulated and compared to other existing methods.

show abstract

Adaptive control of femtosecond pulse propagation in optical fibers

Cited by 50 publications

References 12 publications

Spectral broadening enhancement in silicon waveguides through pulse shaping

Spectral broadening enhancement in silicon waveguides through pulse shaping

Controlled supercontinuum generation for optimal pulse compression: a time-warp analysis of nonlinear propagation of ultra-broad-band pulses

A theoretical approach to feedback control of optical soliton propagation

Contact Info

Product

Resources

About