Ultrabroadband amplification and two-color CW lasing simultaneously near 1.9 μm 2.3 in a Tm3+-doped tellurite fiber were demonstrated experimentally, for the first time to best of our knowledge. A low-loss core from TeO2-ZnO-La2O3-Na2O glasses stable against crystallization was produced by special technique, providing low concentration hydroxyl groups. Supercontinuum highly GeO2 doped silica pumped an Er laser system used as seed amplifier. maximum gain 30 dB 7 measured at μm, respectively....

This Letter reports the experimental realization, for first time to our knowledge, of lasing in an erbium-doped tellurite fiber at 2.72 µm. The key successful implementation was use advanced technology obtaining ultra-dry preforms glasses, as well creation single-mode Er3+-doped tungsten-tellurite fibers with almost imperceptible absorption band hydroxyl groups, a maximum ∼3 linewidth output spectrum narrow 1 nm. Our experiments also confirm possibility pumping Er-doped low-cost high...

This letter demonstrates the passive Q-switching possibility of a 2.3 µm Tm-doped tellurite glass laser with help Fe2+:ZnS saturable absorber. In contrast to Cr2+—doped materials, this absorber is transparent at pump wavelengths (0.69 or 0.8 µm). Pulses as short 150–200 ns were formed.

A 2.3 µm laser action, as well a cascade and 1.9 lasing in diode-pumped tellurite glass fiber, is demonstrated for the first time.

In this paper we present for the first time 2.3 µm thulium doped tellurite glass fiber laser with practically significant output parameters. The 200 mW average and 400 peak powers at were obtained using a 30 cm long pumped by 794 nm coupled commercial diode.

A series of glass samples the tungsten–tellurite system TeO2-WO3-Bi2O3-(4-x) La2O3-xEr2O3, x = 0; 0.4; 0.5; 0.7; 1.2; 2; 4 mol%, CEr 0 - 15 × 1020 cm−3 were synthesized from high-purity oxides in an oxygen flow inside a specialized sealed reactor. In all series, extremely low content hydroxyl groups was achieved (~n 1016 cm−3, more than orders magnitude lower concentration erbium ions), which guarantees minimal effects on luminescence properties Er3+. The glasses are resistant to...

Tm3+ doped TeO2-based well-dehydrated glasses were synthesized and investigated. The analysis of their spectral relaxation properties have showed that these can be a suitable host for bulk fiber lasers emitting at ~2.3 µm wavelength (3H4–3H5 transition). Laser action in the glass sample was demonstrated.

A depressed cladding waveguide composed of 36 parallel tracks is inscribed in high purity 70TeO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -22WO xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> -8Bi O glass by femtosecond laser operating at 1030 nm. The Sellmeier formula for the refractive index investigated obtained range 1170-2350 module negative change a track found to increase with increasing wavelength 640-2000 shows single...

Compact fiber-based sources generating optical pulses with a broadband spectrum in the mid-IR range are demand for basic science and many applications. Laser systems producing tunable Raman solitons special soft-glass fibers of great interest. Here, we report experimental microstructured tellurite demonstrate by numerical simulation their applicability nonlinear soliton conversion mid-infrared (-IR) via self-frequency shift. The fiber dispersion nonlinearity calculated geometry. It is shown...

We propose two-color pump schemes for CW Er-doped tellurite fiber lasers and amplifiers in the 2.7–2.8 µm range at transition. The use of first wavelength 0.98 () or 1.56 second 1.7 allows obtaining gain relatively low powers. have performed a theoretical study laser operation under on basis experimentally measured parameters specially prepared from TeO2–ZnO–La2O3–Na2O glass. It has been shown numerically that, an optimal length, small-signal may exceed 18 dB generation be achieved with...

This paper presents an experimental study of broadband mid-IR amplification that is carried out, for the first time, to best our knowledge, in erbium-doped tungsten tellurite fiber. A simple, robust supercontinuum source based on a tapered germanate fiber developed as seed input region 1.5-3 µm. We show gain by factor 5 one pass can be achieved 2.7 µm range pumping low-cost, high-efficiency diode laser at 976 nm using high-purity glass fibers.

A study of high-purity TeO2-ZnO based tellurite glasses doped with Er3+, Dy3+ or Tm3+ that could be used as laser media in the 2-3 μm spectral range is presented. The are prepared by melting oxides mixture inside a silica glass reactor an atmosphere purified oxygen. low level hydroxyl groups absorption allowed to measure correctly luminescence decay characteristics dopants. rare-earth ions bands, spectra and kinetic emission from levels 4I11/2, 4I13/2 6H13/2 3H4, 3H5, 3F4 investigated....

The amplification of ultrashort signals in the range 2.7 – 3 μm active tellurite glass fibres with high Kerr nonlinearity and concentration erbium ions core is theoretically investigated under diode pumping at a wavelength 0.975 μm. possibility producing pulses energy ∼10 nJ duration smaller than 100 fs ∼20 dB gain shown. Moreover, using specially developed iterative computer algorithm, determining intensity phase generated by measuring their fundamental spectra two additional obtained means...

Optical fibers were produced from high-purity TeO2-WO3-La2O3-(Bi2O3) glasses. Total loss was less than 0.5 dB/m at 1.2-2.8 μm and about 2 maximum of OH-groups absorption 3 with further sharp increase.

The purpose of this paper was to develop fiber lasers in the 2.7–2.8 μm range based on tungsten–tellurite glass that is technically robust compared other fibers currently used laser engineering. Using an advanced technology for producing ultra-dry tellurite glasses, we manufactured Er3+-doped preforms with extremely low absorption and obtained active single-mode fibers. Based a 70 cm long fiber, developed oscillator pumped by low-cost, high-efficiency diode at 976 nm. At highest pump power,...

The TeO2–WO3–La2O3–Er2O3–Bi2O3 (TWLB+Er) glasses with 0–4 mol. % erbium oxide content and various hydroxyl group concentrations characterize by absorption of about 0,001–3 cm−1 at ~ 3 µm as well optical fibers were produced investigated. Stability against crystallization Tg value don't depend on Er concentration. Dependences intensity decay time luminescence bands 1.6 2.75 upon 0.975 excitation vs OH-groups studied.

Monolithic preforms of high-purity TeO2-WO3-La2O3-(Bi2O3) glasses were produced. Absorption hydroxyl groups was down to n×0.001 cm−1 at ~3 μm in both core and cladding. Optical fibers with loss less than 0.5 dB/m region 1.2–2.8 made from them.

The possibility of low-loss erbium or thulium doped tellurite fibers application for laser operation mainly in the 2-3 microns range was studied. High-purity samples were produced and characterized. Photoluminescence spectra measured, amplification seeded signal observed experimentally. Numerical simulations showed potential applicability designed interest.