Submicron-diameter silica taper with a Bragg multilayer structure: observation for TE01 and HE11 mode guidance

Lin Ma; Yuji Matsuura

doi:10.1117/12.745762

21 November 2007 Submicron-diameter silica taper with a Bragg multilayer structure: observation for TE₀₁ and HE₁₁ mode guidance

Lin Ma, Yuji Matsuura

Author Affiliations +

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 67810S (2007) https://doi.org/10.1117/12.745762
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

We demonstrate confinement of light in a submicron-diameter silica core by adding a Bragg multilayer cladding. Simulation results show that silica core Bragg fibers with Si/SiO₂ multilayer claddings exhibit stronger mode confinement than air cladding silica fiber. The optical properties of Bragg fiber taper can be fine tuned via controlling taper diameter and multilayer structures. In experiment, TE₀₁ mode-shaped spots with full-width at half-maximum (FWHM) of 1.2 μm are observed for the first time to our knowledge in solid-core Bragg fibers. By adjusting the refractive index of high index layer, HE₁₁ mode-shaped spots with FWHM of 0.75 μm are generated by 1.1 μm-core Bragg fiber tapers. The proposed devices will be good candidates as polarization selection and mode conversion devices for nano-optical applications.

Citation Download Citation

Lin Ma and Yuji Matsuura "Submicron-diameter silica taper with a Bragg multilayer structure: observation for TE₀₁ and HE₁₁ mode guidance", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67810S (21 November 2007); https://doi.org/10.1117/12.745762

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