"Vanishing-core" tapered coupler for interconnect applications
Citation
Neugroschl, D., Kopp, V. I., Singer, J., & Zhang, G. (2009). “Vanishing-core” tapered coupler for interconnect applications. In Photonics Packaging, Integration, and Interconnects IX, Vol. 7221, Article Number 72210G. SPIE. doi: 10.1117/12.808632
Keywords
- Vanishing-core tapered coupler
- All-fiber device
- Efficient coupling
- Low-numerical-aperture (NA) waveguide
- Standard silica fiber
- High-NA waveguide
- Dissimilar mode field profile
- Planar waveguide
- Laser diode
- Central core
- Secondary core
- Tapered end
- Lens-less
- Low-insertion-loss
- Index matching compounds
- Polarization selective coupling
- Polarizing coupling
- High density interconnects
- Passively aligned interconnects
- Silicon photonics
Brief
The article introduces a "vanishing-core" tapered fiber optic coupler that efficiently connects standard low-numerical-aperture waveguides to high-numerical-aperture waveguides or devices with dissimilar mode field profiles by allowing the central core to disappear at the tapered end, enabling lens-less coupling and integration with other fiber-based devices.
Summary
This article introduces a novel "vanishing-core" tapered fiber coupler for efficiently connecting standard optical fibers (low-NA) to high-NA waveguides like those in silicon photonics and planar devices. This all-fiber device simplifies coupling by eliminating the need for lenses and air gaps, leading to low insertion losses and enabling the use of index matching compounds. The coupler's design, with a disappearing central core in the tapered region, allows for effective light transfer between waveguides with different mode field sizes. It also offers advantages in polarization control and opens possibilities for high-density, passively aligned interconnects and integration with other fiber-based components like polarizers.
Origin: https://sci.bban.top/pdf/10.1117/12.808632.pdf#