Showing papers by "Guy Millot published in 2007"
TL;DR: In this paper, the authors provide an overview of self-similar pulse propagation and scaling in optical fiber amplifiers, and their use in the development of high-power ultrafast optical sources, pulse synthesis and all-optical pulse regeneration.
Abstract: Recent developments in nonlinear optics have led to the discovery of a new class of ultrashort pulse, the `optical similariton'. Optical similaritons arise when the interaction of nonlinearity, dispersion and gain in a high-power fibre amplifier causes the shape of an arbitrary input pulse to converge asymptotically to a pulse whose shape is self-similar. In comparison with optical solitons, which rely on a delicate balance of nonlinearity and anomalous dispersion and which can become unstable with increasing intensity, similaritons are more robust at high pulse powers. The simplicity and widespread availability of the components needed to build a self-similar amplifier capable of producing optical similaritons provides a convenient experimental platform to explore the fundamental nature of dynamical self-similarity. Here, we provide an overview of self-similar pulse propagation and scaling in optical fibre amplifiers, and their use in the development of high-power ultrafast optical sources, pulse synthesis and all-optical pulse regeneration.
344 citations
TL;DR: It is shown that a hybrid configuration combining dispersion decrease and gain has several benefits on the parabolic generated pulses.
Abstract: We experimentally demonstrate the possibility to generate parabolic pulses via a single dispersion decreasing optical fiber with normal dispersion. We numerically and experimentally investigate the influence of the dispersion profile, and we show that a hybrid configuration combining dispersion decrease and gain has several benefits on the parabolic generated pulses.
112 citations
TL;DR: In this article, the authors demonstrate all-fibered 20 GHz and 40 GHz picosecond pulse sources with duty cycles as low as 1/14, achieved via the high-quality compression of an initial sinusoidal beating through four segments of optical fibers.
Abstract: In this work, we demonstrate all-fibered 20-GHz and 40-GHz picosecond pulse sources with duty cycles as low as 1/14. The pulse train is achieved via the high-quality compression of an initial sinusoidal beating through four segments of optical fibers. General design rules are proposed and experimental results are in agreement with numerical predictions.
40 citations
02 Sep 2007
TL;DR: In this paper, the authors demonstrate all-fibered 20 GHz and 40 GHz picosecond pulse sources with duty cycles as low as 1/14, achieved via the high-quality compression of an initial sinusoidal beating through four segments of fibers.
Abstract: In this work, we demonstrate all-fibered 20-GHz and 40-GHz picosecond pulse sources with duty cycles as low as 1/14. The pulse train is achieved via the high-quality compression of an initial sinusoidal beating through four segments of fibers. Experimental results are in agreement with numerical predictions.
16 citations
TL;DR: In this article, a vertical access passive all-optical switching gate has been used to regenerate the zero levels of a 160-Gb/s bit pattern at 1561 nm, and autocorrelation function measurements show that an extinction up to 11.7 dB of the "ghost-pulses" can be achieved
Abstract: A vertical-access passive all-optical switching gate has been used to regenerate the zero levels of a "...01010101..." 160-Gb/s bit pattern at 1561 nm. Autocorrelation function measurements show that an extinction up to 11.7 dB of the "ghost-pulses" can be achieved
16 citations
TL;DR: In this article, the combined effects of Raman soliton self-frequency shift with either compression of a sinusoidal beating or modulation instability leads to the generation of frequency combs with a spectral width higher than 100 nm and a central frequency shifted towards higher wavelengths.
Abstract: It is experimentally shown that the combined effects of Raman soliton self-frequency shift with either compression of a sinusoidal beating or modulation instability leads to the generation of frequency combs with a spectral width higher than 100 nm and a central frequency shifted towards higher wavelengths.
8 citations
TL;DR: In this paper, the behavior of a quantum-well microcavity saturable absorber component cascaded into a 100-km SMF RZ transmission line was analyzed to annihilate the ghost-pulse phenomenon in the following simplified "...010101..." 2-bit pattern at 1555 nm.
1 citations
17 Jun 2007
TL;DR: In this paper, the frequency spacing between the harmonics can be tuned by simply changing the frequency separation between the two initial continuous waves, which can be achieved by either nonlinear compression of a sinusoidal beating or modulation instability.
Abstract: In this aim, we have experimentally implemented two methods, based on either the non-linear compression of a sinusoidal beating [Fatome et al, 2006] or the modulation instability [Mamyshev et al, 1990]. In both cases, we will generate in a single anomalous dispersive highly-nonlinear fiber, a frequency comb with a dominating wavelength (i.e. a wavelength with a higher spectral intensity) shifted toward higher wavelengths. The frequency spacing between the harmonics can be tuned by simply changing the frequency separation between the two initial continuous waves.
1 citations
14 Mar 2007
TL;DR: In this article, les demontrons experimentalement d'exploiter l'auto-glissement frequentiel Raman combine soit a la compression d'un battement sinusoidal, soit l'instabilite de modulation induite.
Abstract: Nous demontrons experimentalement la possibilite d'exploiter l'auto-glissement frequentiel Raman combine soit a la compression d'un battement sinusoidal, soit a l'instabilite de modulation induite. Les deux approches ont permis de generer un peigne de frequences de largeur spectrale superieure a 100 nm dont la frequence centrale s'est decalee vers les hautes longueurs d'ondes.
06 Apr 2007
TL;DR: In this article, the authors present theoretical and experimental studies of both scalar and polarization or modal pump-divided parametric amplification in photonic crystal fibers, where they discuss the possibility of widely tunable frequency conversion and four-wave mixing gain at visible wavelengths.
Abstract: We present theoretical and experimental studies of both scalar and polarization or modal pump-divided parametric
amplification in photonic crystal fibers. In the scalar case, we discuss broadband parametric amplification at telecom
wavelengths near 1550 nm. With a pump-divided scattering process, we discuss the possibility of widely tunable
frequency conversion and four-wave mixing gain at visible wavelengths. We confirmed the theory by experiments where
intense, linearly polarized pump pulses at wavelengths ranging from 532 to 625 nm led to the spontaneous generation of
modulation instability sidebands with frequency shifts ranging from 3 up to 63 THz. The observations were in good
agreement the experimental characterization and theoretical modelling ofthe linear and nonlinear properties of the PCF.
17 Jun 2007
TL;DR: In this article, the authors proposed a new passive and cost-effective approach allowing the generation of picosecond optical pulse trains with very low duty-cycle (around 1/15) at a repetition rate of 20 GHz.
Abstract: The current bandwidth limitations of optoelectronic devices do not enable the direct generation of pulses with temporal width below a few ps and actively mode-locked fiber lasers were found to be an efficient, but onerous option to overcome this limitation. As an alternative issue to conventional mode-locking operation, we propose here a new, passive and cost-effective approach allowing the generation of picosecond optical pulse trains with very low duty-cycle (around 1/15) at a repetition rate of 20 GHz.
17 Jun 2007
TL;DR: In this article, the authors analyzed the cascadability and reshaping properties of a quantum well microcavity saturable absorber (SA) device cascaded inside a RZ-signal SMF-based transmission line to annihilate the ghost-pulse phenomenon taking place in the "...010101..." 160-Gbit/s 2-bit pattern.
Abstract: In this prospective work, we analyze the cascadability and reshaping properties of a quantum well microcavity saturable absorber (SA) device cascaded inside a RZ-signal SMF-based transmission line to annihilate the ghost-pulse phenomenon taking place in the "...01010101..." 160-Gbit/s 2-bit pattern.
TL;DR: In this paper, the authors demonstrate all-fibered 20 GHz and 40 GHz picosecond pulse sources with duty cycles as low as 1/14, achieving high-quality compression of an initial sinusoidal beating through four segments of optical fibers.
Abstract: In this work, we demonstrate all-fibered 20-GHz and 40-GHz picosecond pulse sources with duty cycles as low as 1/14. The pulse train is achieved via the high-quality compression of an initial sinusoidal beating through four segments of optical fibers. We investigate the limits of the scalability to higher repetition rates.