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Uniform passive fiber-ring cavities are macroscopic devices which are known to exhibit dissipative modulation instability (MI) when driven in the rather large dispersion regime [1]. In a previous study we showed that in this regime, a simple modulation of the dispersion along the length of the ring cavity is responsible for the appearance of a new domain of parametric instability, related to Faraday...
A major advantage of solid-state lasers emitting in the 1 μm wavelength range is the possibility of using optical fibers for flexible beam delivery. This is already state of the art in laser material macro-processing with multimode beams. For modern high-brightness lasers with a diffraction-limited beam the guiding is restrained to a few meters or low powers due to nonlinear effects, mainly to Stimulated...
Ultrashort pulse laser ablation is a useful tool in material processing and biomedical fields [1]. A key challenge to expanding the applications of laser ablation is delivering high peak power, ultrashort laser pulses beyond the reach of conventional microscope objectives. Optical fiber endoscopes are widely used to guide light in confined spaces. However, the endoscopic delivery of a focused ultrashort...
When a photosensitive (PS) fiber is exposed to UV-irradiation, a permanent refractive index change is induced in the core. As a result, according to Kramers-Kronig relations, the absorption coefficient (α) is also increased. This increment of the absorption can lead to a significant heating of the fiber when it is illuminated by a moderate optical power. Thermal effects may produce spectral changes...
Optical fibers technology has experienced a tremendous growth and advancement over the past several decades, not only in transmission systems for communications (where nowadays totally dominate especially at the high performances level) but also in the sensing field. For this reason, there is an ever increasing need to add new functionalities and improve the performances, through the integration on...
Analyzing and profiling the dopants in laser active materials, especially fibers and preforms is an important task. These information allows you to monitor the preform fabrication and drawn fibers and investigate their quality. It has been show that using micro-spectroscopy and fluorescence lifetime images (FLIM) can be used to detect and quantify erbium ions in silica samples [1]. The gathered lifetimes...
Superfluorescent fiber sources (SFS) find wide application in many areas of science and technology: in fiber-optic gyroscopes, ophthalmology, optical time-domain reflectometry, optical telecommunications and devices that need a signal with low temporal and high spatial coherence [1]. There is interest in development of new fiber sources operating in spectral IR regions, where rear-earth-doped fibers...
The large mismatch between the Mode Field Diameter (MFD) of conventional single-mode fibers (SMFs) and the MFD of highly nonlinear Photonic Crystal Fibers (PCFs), that can be down to 1.5 μm, or Large Mode Area PCF, that can be up to 25 μm, would require a substantial fiber mode size rescaling in order to allow an efficient direct coupling between PCFs and SMFs. Over the years different solutions have...
High quality sources of single and identical (indistinguishable) photons are essential for photonic quantum information processing including boson sampling, cluster-state quantum computing, and optical quantum repeaters. To enable the use of several single photon sources in parallel and to allow the implementation of complex photonic networks, it is essential that the single photon source can be integrated...
A fiber all optical phase shifter and switch near 1550nm is realized by depositing two-dimensional nanomaterial tungsten disulfide (WS2) to tapered fiber. The device has a slope efficiency of 0.0174π/mW.
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