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Single-to-four core optical fiber coupling using a two-photon polymerization produced waveguide.
Optics Express
|June 11, 2024
Summary
Researchers developed a novel method for optical coupling using two-photon polymerization to create a waveguide manifold on a four-core fiber tip. This fast, low-cost technique shows potential for sensing and optical tweezer applications with low insertion loss.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- Traditional optical coupling methods for single-to-multi-core fibers involve complex fan-ins/fan-outs, free-space optics, or laser-inscribed waveguides.
- These methods can be costly and require delicate alignment procedures.
Purpose of the Study:
- To introduce a novel, fast, and low-cost method for optical coupling between single-core and multi-core optical fibers.
- To fabricate a waveguide manifold directly onto a four-core optical fiber tip using two-photon polymerization.
Main Methods:
- Utilized two-photon polymerization (TPP) to fabricate a waveguide manifold on a four-core optical fiber tip.
- Investigated the influence of numerical aperture (NA) mismatch on coupling performance.
- Measured insertion losses for the fabricated optical coupling structures.
Main Results:
- Successfully fabricated a waveguide manifold on a four-core fiber tip using TPP.
- Demonstrated that coupling performance is significantly influenced by the NA mismatch between the fabricated and coupled waveguides.
- Achieved insertion losses below 5 dB when the NA mismatch was minimized.
Conclusions:
- Two-photon polymerization offers a rapid and cost-effective approach for creating optical coupling solutions for multi-core fibers.
- The developed method shows promise for applications in optical sensing and optical tweezers.
- Further optimization can potentially reduce insertion losses even further.
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