Thierry Chartier

University of Rennes | UR1 · Ecole Nationale Supérieure des Sciences Appliquées et de Technologie de Lannion (ENSSAT)

We report on the modeling and characterization of a truly single-mode hollow-core antiresonant fiber with a transmission band covering part of the near-infrared spectral region. Measured losses are 0.075 dB/m and 0.052 dB/m at 1.55 μm and 2.0 μm respectively.

Self-seeded cavity lasers appear as attractive colorless sources for dense wavelength division multiplexed passive optical networks. Although this technology has already demonstrated high performance in a number of experiments, the strong multimode behavior of these kilometer-long cavities results in large relative intensity noise (RIN) that can be...

We demonstrate the interest of expanded beam microlenses (around 55 µm of mode field diameter) to relax positioning tolerances and to decrease reflectance in single mode fiber to fiber interconnexions. We also point out the interest of micro-lenses of very small mode field diameter (around 2 µm) to improve coupling efficiency in specialty fibers an...

We theoretically and experimentally study the principle of phase-sensitive frequency conversion in a highly-nonlinear fiber using three pump waves. This mechanism, originally demonstrated with four continuous-wave pumps and a signal wave, is based on four-wave mixing and enables to convert the two quadrature components of the signal to different fr...

We report on the development of a nanosecond green laser based on efficient frequency conversion of an Yb-doped fibre laser externally modulated by a semiconductor optical amplifier. The laser system uses commercially available fibers and operates with pulse durations in the range 3-40 ns and repetition rates in the range 50-800 kHz. A maximum conv...

Dense wavelength division multiplexing (DWDM) metropolitan networks are currently being extensively deployed with distances ranging from a couple of ten's kilometers to several hundred kilometers. 40 DWDM channels are commonly used; each of them is carrying today Ethernet or Fiber Channel traffics ranging from 1 to 10 Gb/s. This type of network req...

This work focuses on the influence of stress-rods on bending losses of polarization modes in microstructured optical fibers with large mode area. We perform detailed numerical simulations with a modal solver based on the finite element method that takes into account the stress distribution. We show that such fibers, in addition to guide a single-mo...

The present work concerns the study of pulsed laser systems containing a fiber amplifier for boosting optical output power. In this paper, this fiber amplification device is included into a MOPFA laser, a master oscillator coupled with fiber amplifier, usually a cladding-pumped high-power amplifier often based on an ytterbium-doped fiber. An experi...

A report is presented on four-wave-mixing-based all-optical time-domain demultiplexing of a 170.8 Gbit/s signal down to 42.7 Gbit/s in a chalcogenide GeAsSe microstructured fibre. The high nonlinearity of the fibre allows error-free and low power penalty operation with only 56 mW of total input average power.

We propose and demonstrate a nondestructive method for loss measurement in optical guided structures. In the proposed approach, the device under test does not require connectors at its ends, thus making this technique available for both optical fibers and integrated optical waveguides. The loss measurement is feasible over a broad range, from low (...

We report on all-optical wavelength conversion of a 56 Gb / s differential quadrature phase shift keying signal and a 42.7 Gb / s on-off keying signal. Wavelength conversion is based on four-wave mixing effect in a 1 m long highly nonlinear GeAsSe chalcogenide fiber. The high nonlinearity of the fiber allows low-power penalty operation with a total...

Session orale : Fibres microstructurées

We report on four-wave-mixing based all-optical wavelength conversion of a 56 Gb/s DQPSK signal and all-optical demultiplexing of a 170 Gb/s OOK signal in chalcogenide photonic crystal fibers. The high nonlinearity of the fibers allows error free and low power penalty operation with only 60 mW of total average power.

We demonstrated error-free four-wave-mixing-based wavelength conversion of a 42.7-Gbit/s RZ-33% signal in a 1-m long GeAsSe chalcogenide microstructured fiber with a total average power of 56 mW

A new and simple numerical method to measure simultaneously the dispersion and the third-order Kerr nonlinear coefficient in optical fibers is presented. This method is based on self-phase-modulation-induced spectral broadening experiments and an iterative numerical technique. A standard single mode fiber, a dispersion-shifted fiber and a highly no...

Perfos and the laboratory Glasses and Ceramics Group of University of Rennes 1 have worked together to develop a new fabrication technique for chalcogenide preforms based on the glass-casting process. Various fiber profiles have been designed by the Fresnel Institute and fiber losses have been significantly improved, approaching those of the materi...

We propose a new solution for modal decomposition in multimode fibers, based on a spectral and spatial imaging technique. The appearance of spurious modes in the spectral and spatial processing of the images at the output of the fiber under test when it has more than two modes is demonstrated theoretically. The new method, which allows us to identi...

We demonstrated error-free four-wave-mixing-based wavelength conversion of a 42.7-Gbit/s RZ-33% signal in a 1-m long GeAsSe chalcogenide microstructured fiber with a total average power of 56 mW.

We report a chalcogenide suspended-core fiber with ultra-high nonlinearity and low attenuation loss. The glass composition is As38Se62.With a core diameter as small as 1.13 µm, a record Kerr nonlinearity of 46 000 W–1km–1 is demonstrated with attenuation loss of 0.9 dB/m. Four-wave mixing is experimented by using a 1m-long chalcogenide fiber for 10...

Le présent travail concerne les lasers à fibre impulsionnels de puissance de type MOPFA (oscillateur maître suivi d’un amplificateur à fibre). Il vise dans un premier temps à exposer expérimentalement les différences notoires du faisceau laser émis, conditionnées par les caractéristiques spectrales et de cohérence de l’oscillateur laser maître, en...

session orale JNOG_5 "Effets non-linéaires"

Chalcogenide glasses are known for their high non-linear optical properties (100 - 1000 times as high as the non linearity of silica glass). To enhance the non-linear properties, As-Se suspended-core fibers were manufactured. First, high-purity glasses were elaborated and moulded to obtain high-quality preforms. After drawing, the diameter of the s...

We theoretically demonstrate the use of a dispersion-managed fiber as the nonlinear fiber of an all-optical regenerator at 160 Gbit/s. The regenerator improves the Q-factor of the signal by a factor of 3.2 dB.

Self-phase modulation and 10-GHz four-wave mixing are demonstrated in a low-loss and ultra-highly nonlinear suspended-core chalcogenide fiber. A record Kerr nonlinearity of 31 300 is measured and a direct evidence of fast response in time-resolved measurement of the nonlinear frequency conversion of high repetition rate is provided.

Microstructured optical fibers (MOFs) are traditionally prepared using the stack and draw technique. In order to avoid the interfaces problems observed in chalcogenide glasses, we have developed a new casting method to prepare the chalcogenide preform. This method allows to reach optical losses around 0.4 dB/m at 1.55 µm and less than 0.05 dB/m in...

We report a suspended-core chalcogenide fiber with a record Kerr nonlinearity of 31 300 W^-1 km^-1 and an attenuation of 4.6 dB/m. The dispersion, the effective area and the number of modes propagating in the fiber are investigated.

RÉSUMÉ Nous proposons une nouvelle méthode pour mesurer simultanément la dispersion chromatique du second ordre et le coefficient non-linéaire Kerr de fibres optiques. La méthode est basée sur l'automodulation de phase et une technique numérique itérative. MOTS-CLEFS : caractérisation de fibres optiques ; coefficient non-linéaire Kerr ; automodulat...

RÉSUMÉ Une fibre optique à coeur suspendu en verre de chalcogénure AsSe avec un coefficient non linéaire Kerr de 31 300 W -1 km -1 est présentée. Les effets d'automodulation de phase et de mélange à quatre ondes sont démontrés. La conversion de longueur d'onde par mélange à quatre ondes est obtenue avec une efficacité de conversion de l'ordre de −3...

Chalcogenide glasses are known for their large transparency in the mid-infrared and their high refractive index (>2). They present also a high non-linear coefficient (n2), 100 to 1000 times larger than for silica, depending on the composition. An original way to obtain single-mode fibers is to design microstructured optical fibers (MOFs). These fib...

We propose a real, highly nonlinear, As2Se3-based chalcogenide photonic crystal fiber in which a supercontinuum (SC) spanning more than 2 octaves is generated at lambda=2.8 mum in the femtosecond regime. The designed PCF is characterized for ultrabroadband mid-infrared SC generation in only few millimetres of fiber length. A full modal analysis of...

Chalcogenide glasses are known for their large transparency in the mid infrared and their high refractive index (>2). They present also a high non linear coefficient (n₂), 100 to 1000 times larger than for silica, depending on the composition. An original way to obtain single-mode fibers is to design microstructured optical fibers (MOFs)...

Chalcogenide glasses are based on a mixture of chalcogen elements (Sulphur, Selenium and Tellurium) and other elements such as Arsenic, Germanium, Antimony or Gallium. Compared to silica glasses, they offer several distinctive optical properties such as their transmission window which extends far into the infrared spectral region (up to 25μm for te...

A novel and simple procedure to improve the accuracy of the measurement of the third-order Kerr non-linear coefficient of optical fibers based on self-phase modulation is described. It includes an efficient method to identify the chirp of the input pulse. A standard single-mode fiber and a highly non-linear microstructure chalcogenide fiber have be...

We report the numerical and experimental studies of a spectrally filtered-based all-optical 2R regenerator at 170 Gbps. The fiber device is combined with a fast saturable absorber. BER assessment exhibits a receiver sensitivity improvement.

oral session C " Preparation and Property ", oral [TuA-16]

New glass-casting methods are being devised that create chalcogenide photonic-crystal fibers (PCF) with record high nonlinear coefficients. Chalcogenide glasses also exhibit an extremely high nonlinear refractive-index coefficient that can be two or three orders of magnitude greater than that of silica at 1.55 μm. These newly developed fibers enabl...

We report significant advances in the fabrication of low loss chalcogenide microstructured optical fiber (MOF). This new method, consisting in molding the glass in a silica cast made of capillaries and capillary guides, allows the development of various designs of fibers, such as suspended core, large core or small core MOFs. After removing the cas...

Both theoretical and experimental analysis of a new efficient method to measure the number and type of modes propagating in optical fibers are presented. This consists in measuring the intensity of the near field image at the end of a fiber while scanning the wavelength with a laser source signal. Modes are extracted from Fourier transformation of...

We demonstrate a simple method to measure the evolution of nonlinear effects along a pulse. An all-fiber acousto-optic modulator is synchronized to the pulse emission and inserted between the laser output and an optical spectrum analyzer. Thanks to this configuration, the application of a short modulator opening time (10 ns typically) compared to t...

In this talk, we review the linear properties of chalcogenide microstructured optical fibers (MOFs) of several types. We mainly focus our talk on mid-infrared applications of such fibers. We start with the general properties of solid core MOFs made of these high index glasses and compare them with the ones of silica. Then, we give some details conc...

A 170-Gb/s all-optical 2R regenerator made up of a fast saturable absorber and a highly nonlinear-fiber-based power limiter is reported for the first time. Bit-error-rate assessment of one of the four 42.5-Gb/s optical time-division-multiplexed tributaries shows a receiver sensitivity improvement.

Chalcogenide glasses are known for their large transparency in the mid infrared and their high refractive index (>2). They present also a high non linear refractive index (n2), 100 to 1000 times larger than for silica. An original way to obtain single-mode fibers is to design photonic crystal fibers (PCFs). Until now, chalcogenide PCFs are realized...

conference 7598 " Optical Components and Materials VII ", Topic " Optoelectronic Materials and Devices ", Session 5 " Optical Fibers and Devices II " [7598-22]

extension WO2010133488 (A1) le 25/11/2010

We report the numerical and experimental studies of a spectrally filtered fiber-based optical limiter at 170 Gbit/s. The device, including less than 1 km-long of highly nonlinear optical fiber and a 3 nm-width filter, exhibits good performance at an average input power of 14.5 dBm. No power penalty has been observed and a strong robustness against...

We demonstrate a simple technique to measure the modal content of a multi-mode optical fiber by using a tunable source and a camera, and processing the near-field images measured at the fiber output.

We report the characterizations of an AsSe chalcogenide holey fiber including loss, dispersion, effective area and nonlinear coefficient. The fiber exhibits a record Kerr nonlinearity of 15000 W^-1 km^-1, which allows great potential for nonlinear applications.

We report a new method to measure the third order Kerr coefficient of optical fibres. This method is based on the self-phase-modulation-induced spectral broadening of optical pulses.

We report on the experimental and theoretical study of a self-phase-modulation-based regenerator at 42.6 Gbit/s with a return-to-zero 33% format. We point out some detrimental effects such as intrachannel interactions and Brillouin scattering. An efficient solution, relying on a self-phase-modulation-based pulse compressor in combination with the r...

We report the experimental demonstration of an optical regenerator at 42.6 Gbit/s by using a self-phase-modulation-based pulse compressor and a self-phase-modulation-based regenerator. An improvement of the transmission distance is achieved.

We report the nonlinear characterization of a chalcogenide holey fiber, based on the AsSe glass composition. A nonlinear coefficient as high as 15 000 W^-1 km^-1 has been measured.

The all-optical regenerator based on self-phase modulation (SPM) and off-centered filtering has attracted much interest thank to its simplicity and efficiency. The regenerator includes a nonlinear fibre and an off- centered filter placed at the output of the fibre. Designing the regenerator consists to find the appropriate set of parameters for the...

Session affiches 14 « Effets non linéaires en optique guidée » [A5.6]

session orale 3 « Effets nonlinéaires » [Ma1.4], http://optiquelille2009.univ-lille1.fr/

In this paper, we have demonstrated all-fiber Q-switched cavities optimized for short and smooth output pulse generation. The great efficiency of small core diameter fibers allows reaching short pulses without using high pump power, preserving the setup simplicity of low power single transverse mode cavities.

Photonic-bandgap fibers (PBGF) are suitable for Raman-free propagation due to their intrinsic spectral filtering properties. The use of an all-solid PBGF for Raman filtering has been demonstrated. In this paper, we focus on the design of all-solid PBGFs for Raman-free propagation, and evaluate their performance by using an efficient spectrally-reso...

In this paper, we investigate the linear and nonlinear properties of GeSbS and AsSe chalcogenide photonic crystal fibers. Through several experimental setups, we have measured the second- and third-order chromatic dispersion, the effective area, losses, birefringence, the nonlinear Kerr coefficient as well as Brillouin and Raman scattering properti...

Symposium 25 " Glasses for Optoelectronic and Optical Applications ", Session " Glass Fibers " [PACRIM8-S25-039-2009]