Coraline Fortier

Strong infrared spectral broadening in low-loss As-S chalcogenide suspended core microstructured optical fibers

We report the fabrication and characterization of the first guiding chalcogenide As(2)S(3) microstructured optical fibers (MOFs) with a suspended core. At 1.55 microm, the measured losses are approximately 0.7 dB/m or 0.35 dB/m according to the MOF core size. The fibers have been designed to present a zero dispersion wavelength (ZDW) around 2 microm. By pumping the fibers at 1.55 microm, strong spectral broadenings are obtained in both 1.8 and 45-m-long fibers by using a picosecond fiber laser.

Microstructured chalcogenide optical fibers from As2S3 glass: towards new IR broadband sources

The aim of this paper is to present an overview of the recent achievements of our group in the fabrication and optical characterizations of As(2)S(3) microstructured optical fibers (MOFs). Firstly, we study the synthesis of high purity arsenic sulfide glasses. Then we describe the use of a versatile process using mechanical drilling for the preparation of preforms and then the drawing of MOFs including suspended core fibers. Low losses MOFs are obtained by this way, with background level of losses reaching less than 0.5 dB/m. Optical characterizations of these fibers are then reported, especially dispersion measurements. The feasibility of all-optical regeneration based on a Mamyshev regenerator is investigated, and the generation of a broadband spectrum between 1 µm and 2.6 µm by femto second pumping around 1.5 µm is presented.

Linear and Nonlinear Characterizations of Chalcogenide Photonic Crystal Fibers

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 properties.

Experimental investigation of Brillouin and Raman scattering in a 2SG sulfide glass microstructured chalcogenide fiber.

In this work, we investigate the Brillouin and Raman scattering properties of a Ge15Sb20S65 chalcogenide glass microstructured single mode fiber around 1.55 microm. Through a fair comparison between a 2-m long chalcogenide fiber and a 7.9-km long classical single mode silica fiber, we have found a Brillouin and Raman gain coefficients 100 and 180 larger than fused silica, respectively.

A Passive All-Optical Device for 2R Regeneration Based on the Cascade of Two High-Speed Saturable Absorbers

We discuss the design and realization of a passive all-optical device for 2R regeneration based on a dual-stage of high-speed microcavity saturable absorbers, one for noise reduction of digital zeros (SA-0), and the other for noise reduction of digital ones (SA-1). The numerical and experimental results showed that by using a simple combination of SA-0 and SA-1 devices, one can obtain an intensity transfer function with a large extinction ratio improvement of low power levels and a strongly nonlinear response reducing the noise of high power levels. The amplitude and phase characterization of a 40-GHz signal transmitted by this device, obtained by frequency-resolved optical gating measurements, reveals the intensity-dependant pulse-compression effect and the low chirp introduced by this device.

Characterization in intensity and phase of a passive all-optical device based on saturable absorbers for high bit rate 2R regeneration

We discuss the design and characterisations of a passive all-optical device for 2R regeneration based on a dual-stage of high-speed microcavity saturable absorbers. The measurement of signals at 40GHz by FROG technique reveals the low chirp introduced by this device.

On recent progress in all-fibered pulsed optical sources from 20 GHz to 2 THz based on multiple four wave mixing approach

In this paper, we report recent progress on the design of all-fibered ultra-high repetition-rate pulse sources for telecommunication applications around 1550 nm. Based on the nonlinear compression of an initial beat-signal in optical fibers through a multiple four-wave mixing process, we theoretically and experimentally demonstrate that this simple technique allows an efficient and accurate design of versatile pulse sources having repetition rates and pulse durations ranging from 20 GHz up to 2 THz and from 10 ps up to 110 fs, respectively.

Recent progress on the realization of chalcogenides photonic crystal fibers

In this work, we review recent progress on the realization of chalcogenides Photonic Crystal Fibers (PCFs). We present the fabrication of chalcogenide PCFs with a solid core for three different glass compositions containing a variety of chalcogens. We show that the Stack and Draw technique currently used for silica PCFs can be problematic in the case of chalcogenides glasses. We present correct PCF design enables a significant improvement of final fiber losses. We obtained a lowest attenuation of 3 dB/m at 1.55 μm, of 4.5 dB/m at 3.39 μm and 6 dB/m at 9.3 μm. We also present experimental demonstration of self phase modulation spectral broadening around 1,55 μm. Moreover, we investigate the Brillouin and Raman scattering properties of a GeSbS PCF.

Experimental investigation of Brillouin and Raman scattering in a Ge 15 Sb 20 S 65 microstructured chalcogenide fiber

We investigate the Brillouin and Raman properties of a Ge₁₅Sb₂₀S₆₅ chalcogenide microstructured fiber around 1550 nm. We have found Brillouin and Raman gain coefficients 100 and 180 larger than fused silica.

Practical design rules for ultra high-speed dense dispersion management telecommunication systems

In this work, we establish and analyze some practical design rules for the implementation of ultra-high speed (>160-Gbit/s) telecommunication systems based on dense dispersion management.