Faraday rotation influence factors in tellurite-based glass and fibers

Abstract

The Faraday rotation influence factors in tellurite-based glass and fibers were studied by experiments and simulations. TeO 2 -ZnO-Na 2 O-BaO glass family was fabricated and characterized in terms of the thermal and magneto-optical properties. Two core-cladding pairs for two fibers were selected from fabricated glasses. The Verdet constants of the glasses and fibers were measured at different wavelengths using a homemade optical bench, and the Verdet constant of fiber was close to that of the bulk glass. The influence from external factors (wavelength, laser power and magnetic field) and internal factors (thermal expansion coefficient difference, refractive index and Verdet constant of core and cladding) on Faraday rotation in fibers was investigated and discussed, and the purpose of this study is to improve the Faraday rotation in tellurite fibers for MO device applications both from internal material property match and external parameter configuration in measurement.

Synthesis and characterization of a titanium phosphate‐tellurite glass for Faraday rotators

“…The values of the Verdet constant have significantly increased due to doping with Er 3+ ions, these values being comparable to those of the lanthanum‐doped tellurite glasses. Fibers based on tellurite glass with magneto‐optical properties have also been investigated for applications in the field of optical current transducers 36,37 …”

“…TeO 2 glasses can be classified into either Te‐rich glasses with around 50 mol% TeO 2 in binary and ternary systems with application in lasers, optical fibers, amplifiers, 1‐11 or into low‐Te glasses where TeO 2 is only added in low amounts as dopant 3,12‐15 . TeO 2 glasses are promising low phonon hosts for rare‐earth elements 1,16‐23 or present luminescence properties themselves 2 .…”

“…TeO 2 glasses are promising low phonon hosts for rare‐earth elements 1,16‐23 or present luminescence properties themselves 2 . Having a broadband NIR emission and a lifetime of tens of microseconds, Te glasses of different compositions (zinc oxide, phosphate, vanadate, borate, etc) may be promising material for fabricating broadband optical fibers, amplifiers, windows, lenses or tunable lasers in visible (Vis) 3‐10,24‐27 or in infrared (IR) domain 11,24,28 …”

“…Due to the high polarizability, high refractive indices, and good transparency of the Te 4+ ions in the wavelength range from the visible to the middle infrared domain, TeO 2 ‐based optical fibers, and glasses have the characteristics required for the development of efficient magneto‐optical (MO) components 29‐34 …”

Optical nonlinearities in microstructures produced by ultrashort laser pulses

“…[34][35] Furthermore, their physical properties can be tailored by modifying the glass matrix composition, by the addition of dopants, 36 and by thermal/chemical treatments. 37 For instance, glasses with interesting features like photoluminescence, [38][39] magneto-optical effect 40 and high nonlinear optical properties [41][42] have already been realized. The DLW technique with ultrashort laser pulses has been vastly applied to the fabrication of photonic devices in glassy materials.…”