Ultra-dense, laser-welded, multi-core fiber-optic interfaces

Area of Science:

• Optics and Photonics
• Materials Science
• Laser Technology

Background:

• Fiber-optic interface packing density is limited by cladding diameter.
• Current methods struggle to increase density without compromising performance.

Purpose of the Study:

• Investigate direct laser welding of multi-core fibers.
• Develop a method for constructing arbitrary-pitch arrayed optical interfaces.
• Overcome packing density limitations in fiber optics.

Main Methods:

• Applied submicron-precision laser welding to multi-core fibers.
• Utilized 4- and 7-core fiber configurations.
• Quantified beam quality preservation post-welding.

Main Results:

• Successfully constructed multi-core fiber interfaces using laser welding.
• Demonstrated preservation of individual core beam quality.
• Confirmed laser welding invariance to core radial distribution.

Conclusions:

• Direct laser welding is a viable technique for high-density fiber-optic interfaces.
• This method allows for arbitrary pitch construction while maintaining optical performance.
• Enables advanced optical interconnects with improved packing density.