Fibers characterization

The group possesses an expertise and necessary instrumentation for investigation of conventional and specialty fibers (including photonic crystal fibers) and a variety of fiber-optic components and devices. These includes:

  • measurements of phase and group modal birefringence in a wide spectral range,
  • measurements of polarization mode dispersion and chromatic dispersion in a wide spectral range,
  • measurements of transmission losses, bending losses, and polarization dependent losses,
  • measurements of sensing characteristics of single mode and birefringent fibers (interferometric and polarimetric sensitivity) to different physical parameters like temperature, hydrostatic pressure, axial and transverse load,
  • measurements of sensing characteristics of Bragg gratings inscribed in specialty fibers,

We are also capable of fabrication and characterization of:

  • long period gratings of different types in silica conventional and photonic crystal fibers,
  • Bragg gratings and long period gratings in polymer conventional and photonic crystal fibers.

Numerical simulations

Significant part of our expertise is in simulations and modeling of photonic components using advanced numerical tools. These includes modeling of linear and nonlinear propagation and sensing characteristics in conventional and specialty fibres, Bragg gratings, long period gratings, and other fiber-optic and integrated components.

Using commercial and self developed software packages, we can simulate a wide range of linear and nonlinear propagation characteristics such as effective index, mode field distribution, confinement factor, mode effective area, chromatic dispersion, confinement and bending losses, polarization dependent losses, phase and group birefringence, generation of supercontinuum, four wave mixing, solitons propagation, third harmonic generation and other nonlinear processes. We can also model susceptibility of propagation characteristics to external physical parameters such as temperature, bending, twist, axial and transversal load, hydrostatic pressure, and others.