Rare-earth ion doped TeO2 and GeO2 glasses as laser materials

We investigated the suitability of three ternary tellurite glass families for use as optical fibre materials. Systematically varied compositions were produced and the scalability of the glass volumes was assessed. Detailed thermal analysis was conducted to provide justification for the observed billet scaling results. Compositional trends in the linear and nonlinear refractive indices were measured and correlated to structural information gained from measured Raman spectra. Physical mechanisms are suggested to explain the observed trends. Finally we explore the suitability of these glasses for optical fibre fabrication.

Ternary tellurite glasses for the fabrication of nonlinear optical fibres

In this work, we report the experimental observation of supercontinua generation in two kinds of suspended-core microstructured soft-glass optical fibers. Low loss, highly nonlinear, tellurite and As2S3 chalcogenide fibers have been fabricated and pumped close to their zero-dispersion wavelength in the femtosecond regime by means of an optical parametric oscillator pumped by a Ti:Sapphire laser. When coupled into the fibers, the femtosecond pulses result in 2000-nm bandwidth supercontinua reaching the Mid-Infrared region and extending from 750 nm to 2.8 µm in tellurite fibers and 1 µm to 3.2 µm in chalcogenide fibers, respectively.

Mid-infrared 2000-nm bandwidth supercontinuum generation in suspended-core microstructured Sulfide and Tellurite optical fibers

article We report the results of a systematic study of the thermal and optical properties of a new family of tellurite glasses, TeO2-ZnO-BaO (TZBa), as a function of the barium oxide mole fraction and compare them with those of TeO2-ZnO-Na2O (TZN). The characteristic temperatures of this new glass family (glass transition, Tg, crystallization, Tx, and melting, Tm) increase significantly with BaO content and the glasses are more thermally stable (greater ΔT=Tx −Tg) than TZN glasses. Relative to these, Raman gain coefficient of the TZBa glasses also increases by approximately 40% as well as the Raman shift from ~680 cm −1 to ~770 cm −1 . The latter shift is

Thermal and optical properties of TeO2–ZnO–BaO glasses

High-power mid-infrared supercontinuum sources: Current status and future perspectives

By optimizing glass composition and using a multistage dehydration process, a ternary 80TeO2-10ZnO-10Na2O glass is obtained that shows excellent transparency in the wavelength range from 0.38 µm up to 6.10 µm. Based on this optimized composition, we report on the fabrication of a single-mode solid-core tellurite glass fiber with large mode area of 103 µm2 and low loss of 0.24~0.7 dB/m at 1550 nm. By using the continuous-wave self-phase modulation method, the non-resonant nonlinear refractive index n2 and the effective nonlinear parameter γ of this made tellurite glass fiber were estimated to be 3.8×10-19 m2/W and 10.6 W-1·km-1 at 1550 nm, respectively.

Solid-core tellurite glass fiber for infrared and nonlinear applications.

We report on the fabrication of a single-mode solid-core tellurite glass fiber with large mode area of 103 µm2 and low loss of 0.24∼0.7 dB/m at 1550 nm. By using the continuous-wave self-phase modulation method, the non-resonant nonlinear refractive index n 2 is estimated to be 3.8×10−19 m2/W at 1550 nm.

Elizabeth J. Bushong

Papers

Solid-core tellurite glass fiber for infrared and nonlinear applications.

Single-mode solid-core tellurite glass fiber with large mode area and low loss for infrared applications