Wavelength dispersion of Verdet constants in chalcogenide glasses for magneto-optical waveguide devices

Complex Faraday Rotation in Microstructured Magneto‐optical Fiber Waveguides

“…In all of the cases discussed here, the operating wavelength (vis-NIR) is on the low-frequency side of the electronic band gap, which is located at about 160 nm for the vitreous SiO 2 , [ 48 ] 350 nm for the terbium aluminosilicate, 400 nm for the tellurite glass and 580 nm for the chalcogenide glass. [ 49 ] As a result, the dispersion is normal (d n /d ω < 0) and the Verdet constant decreases at longer wavelengths (Figure 2 a).…”

Large phase shifts in As_2S_3 waveguides for all-optical processing devices

“…3(b). The calculation from the dispersion of the refractive index of As 2 S 3 films 12 and literature reports 7 indicate that line dispersion ␤ 2 of As 2 S 3 films at 1530 nm is about 4 ϫ 10 −3 to 6 ϫ 10 −3 ps 2 / cm and can be neglected. Therefore only the spectral broadening produced by SPM was considered in these simulations.…”

Optical Fibre Magnetic Field Sensors for Monitoring οf the State of Work of Electric Motors

“…For the light of a wavelength λ = 1550 nm the polarization rotation within the testing magnetic field induction range (0 ≤ B ≤ 30 mT) were immeasurably small. It is caused by a very strong dependence of the Verdet's constant value on wavelengths of light V = f (λ) [6,9]. (For λ = 1550 nm the Verdet constant V has above two order small value than for λ = 635 nm.)…”

“…Measurements of the magnetic field may be realized by means of the Hall generator (so-called -hallotron) [3][4][5][6]. However, the application of hallotrons is often troublesome because electric motors generate disturbing magnetic field which affects operation of the sensor.…”

“…The Department of Optoelectronics at the Silesian University of Technology in Gliwice, Poland and the Electrotechnical Institute in Warsaw have been cooperating for elaboration of a measuring system of magnetic field inside direct-current motors based on a magnetooptic effect [6][7][8][9][10][11][12][13][14]. Such kind of system consists of an optical sensor, in which changes of a state of polarization (SOP) of an electromagnetic wave result from changes of the * corresponding author; e-mail: kamil.barczak@polsl.pl intensity of magnetic field.…”