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Complete Polarization Control for a Nanofiber Waveguide Using Directional Coupling

2019; American Physical Society; Volume: 11; Issue: 6 Linguagem: Inglês

10.1103/physrevapplied.11.064041

2331-7043

Fuchuan Lei, Georgiy Tkachenko, Jonathan M. Ward, Síle Nic Chormaic,

Advanced Fiber Optic Sensors

Though they are used widely across optics and photonics, nanofiber waveguides have a critical drawback: their inability to maintain the polarization state of guided light. This study reports a simple, very reliable method for complete polarization control via free-space compensation that is applicable to any nondichroic optical element, including adiabatically tapered single-mode nanofibers. Polarization control is realized by exploiting near-field directional coupling between two crossed nanofiber waveguides. These findings will have an impact on the vast range of systems based on optical nanofibers and evanescently coupled elements.