Disorder-induced single-mode transmission

Abstract

Localized states trap waves propagating in a disordered potential and play a crucial role in Anderson localization, which is the absence of diffusion due to disorder. Some localized states are barely coupled with neighbours because of differences in wavelength or small spatial overlap, thus preventing energy leakage to the surroundings. This is the same degree of isolation found in the homogeneous core of a single-mode optical fibre. Here we show that localized states of a disordered optical fibre are single mode: the transmission channels possess a high degree of resilience to perturbation and invariance with respect to the launch conditions. Our experimental approach allows identification and characterization of the single-mode transmission channels in a disordered matrix, demonstrating low losses and densely packed single modes. These disordered and wavelength-sensitive channels may be exploited to de-multiplex different colours at different locations.

Modal area statistics for transverse Anderson localization in disordered optical fibers

“…For a disordered optical fiber, the scaling characteristics of the MA-PDF with respect to the transverse dimensions of the fiber are completely different from the periodic case. Disorder-induced TAL localizes most of the guided modes across the transverse structure of the disordered fiber and each mode provides a narrow guiding channel [34]. Figure 3 shows the MA-PDF for a TALOF where all parameters involved in the disordered structure are exactly the same as Fig.…”

Disordered Anderson Localization Optical Fibers for Image Transport—A Review

“…In particular, Refs. [80], [81] recently pointed out that the presence of a strong disorder in TAL fibers can be exploited to obtain high-quality wavefronts. Abaie et al [81] showed, in agreement with the theoretical analysis of Ref.…”

Hyperuniformity in amorphous speckle patterns

“…Disorder [1] is generally considered detrimental for imaging or optical information transport, nevertheless, complex systems can disclose extraordinary physical properties, allowing the confinement of light [2], and enabling high resolution imaging techniques [3]. The task of driving light at the nanoscale is usually fulfilled by homogeneous waveguides or photonic crystals supporting a band gap [4]: completely ordered structures which allow to tailor the light flow.…”