The photosensitivity of GeS(x) binary glasses in response to irradiation femtosecond pulses at 800 nm is investigated. Samples with three different molecular compositions were irradiated under exposure conditions. material laser was characterized by both refractometry and micro-Raman spectroscopy. It shown that the relative content sulfur glass matrix influences photo-induced refractive index modification. At low content, positive negative changes can be obtained while high only a change...

Tellurite glass is proposed as a host for Yb 3+ , Tm and Ho triply doped optical fiber and, in this work, new multimode with triply-doped core was fabricated.We report results on the processing characterization of tellurite-based preforms fibers.Cr used tracer to assess quality uniformity across 60 mm length preform.By Raman fluorescence ions contained into core, we also mapped interface between cladding that reveals an around 45 µm 10.11 preform.For excited at 980 nm, generated white light...

We demonstrate a broadband As2S3-based fiber coupler operating up to the 5.4 μm wavelength range developed by using fused biconical tapering technique. During manufacturing process, real-time data monitoring of coupling ratio was at 2.64 μm. The measurement minimal excess loss less than 1 dB in 5-5.4 Also, bend numerically analyzed determine optimal geometric parameters.

We proposed a new concept of increasing the plasticity chalcogenide glasses while maintaining high glass transition temperature. The main idea this lies in formation Ag–Ag metallophilic interactions when silver is introduced into composition. This suggestion was confirmed by experimental study based on Ag2Se–Sb2Se3–GeSe2 system. It observed that introduction 40 mole percent Ag2Se composition leads to increase its 3.5 times, whereas temperature such remains higher than 200 °C. most typical...

We present the first study of photosensitivity GeS binary glasses in response to irradiation femtosecond pulses at 800 nm. A maximum positive refractive index change 3.5x10(-3) is demonstrated with possibility control waveguide diameter from ~8 ~50 µm by adjusting input pulse energy. It also that under different exposure conditions, a negative -7.5x10(-3) can be reached. The results clearly illustrate potential this family for fabrication mid-infrared waveguides.

It has been established that rare earth elements (REE), as alloying additives, are a significant source of hydrogen and oxygen impurity in glasses Ge – S As systems. A method developed includes loading germanium the form monosulfide high-temperature annealing REE their compounds sulfur vapor, reducing content absorbing impurities sulfide-germanium glasses. Samples especially pure Ge42.5S57.5 Ge35As10S55 composition doped with praseodymium up to 1450 ppm(at) were prepared. The...

The effect of iodine (I2) on the photoluminescence properties Tm3+ ions in As2S3 matrix was investigated. Results showed three strong emission bands at 1.22 µm (3H5→3H6), 1.46 (3H4→3F4) and 1.82 (3F4→3H6) under excitation wavelength 800 nm, indicating that I2 enables solubility glasses. concentration ratio were optimized it revealed increasing 4 times glass increases Tm times. effects fundamental properties, including optical, thermal structural characteristics, explored as well.

Values of glass transition temperature ( T g ) and linear expansion coefficient (α) for A s x S 100− glasses were measured in the range concentrations 35 × 42. Because importance formation region 42 optical fibers elaboration, special attention was made on high‐pure glasses. For 38, we measure with interval equal to 1 at.% arsenic. We also values 0.5 s. obtained nonlinear behavior , reflecting change molecular composition s‐ studied. The control such parameters is important produce specific...

Glasses having the composition (100 − x)As2P2S8−xGa2S3 with x ranging from 0 to 50% were investigated determine compositional effect on properties and local structure. The glass transition temperature (Tg) stability parameter against crystallization (Tx Tg) increased addition of Ga2S3. structure these glasses was probed by Raman scattering, Fourier transform infrared (FT-IR) 31P nuclear magnetic resonance. On basis observed vibrations strength 31P−31P homonuclear dipolar coupling, two...

Two-layer optical fibers have been fabricated from As-S chalcogenide glasses. The losses of these are 23 ± 8 dB/km at a wavelength 2.3 μm: record low for IR this type. Between 1.3 and 2.7 μm, the do not exceed 100 dB/km. At 2.94 μm an Er:YAG laser, 350 far-zone numerical aperture is 0.49 90% power level.

Main error sources and their contribution to the total of measuring optical loss spectrum by cut-back method are analyzed in mid-IR range (2-20 μm) for multimode fibers made from materials with high (2-4) refractive index values. It is shown that case insufficient fiber length, neglecting value leads a systematic overestimation measured losses: higher core material, greater an overestimation. The main errors typically introduced bad repeatability preparation quality ends lower...

For the first time molecular impurity composition of high-purity sulfur was investigated using gas chromatography-mass spectrometry method. The sample preparation consisted extracting impurities from samples during their vacuum distillation. mass sulfur, which used for extraction, up to 1 kg. Impurities were condensed in glass ampoules then carried them inlet dosing system spectrometer. separation, GS-GasPro capillary adsorption columns with a modified silica gel sorbent and...

The molecular composition of impurities in special purity selenium was studied for the first time using gas chromatography-mass spectrometry method. concentrate with boiling points below that obtained by its vacuum distillation. were condensed and frozen from vapor phase beyond zone complete condensation vapors. analysis samples performed an Agilent 6890 / 5973N spectrometer a quadrupole mass analyzer. samples' input into analytical device carried out system made stainless steel tubes. For...

This paper reports recent achievements in the field of infrared optical fibers based on vitreous arsenic chalcogenides (As<SUB>2</SUB>S<SUB>3</SUB>, As<SUB>2</SUB>Se<SUB>3</SUB>, As<SUB>2</SUB>Se<SUB>1.5</SUB>Te<SUB>1.5</SUB>). The minimum losses from sulfide, selenide and telluride are equal to 20 - 30 dB/km at 2.2 3.3 micrometers , 80 100 4.3 300 6.7 respectively. Among them double polymer coated two-layer arsenic-sulfide have lowest (20 25 dB/km) highest mechanical bending strength (1 1.5 GPa).

glasses and their parameters were investigated. The total losses in the emission region of CO lasers 8–10 dB/m, whereas