Cladded self-written multimode step-index waveguides using a one-polymer approach.

Area of Science:

• Materials Science
• Optoelectronics
• Photonics

Background:

• Low-loss optical coupling is essential for advanced technologies like integrated circuits and polymer sensor networks.
• Reliable and efficient production methods are critical for fabricating these optical structures.
• Self-written waveguides offer a promising solution for creating optical connections.

Purpose of the Study:

• To present a simple and efficient one-polymer approach for self-written optical connections.
• To demonstrate fabrication of optical connections between various light-guiding structures.
• To reduce fabrication complexity compared to previous multi-material methods.

Main Methods:

• A two-step process involving cw laser writing in the blue wavelength range within a photopolymerizing mixture.
• Utilizing light self-focusing within the monomer resin to form waveguides.
• Subsequent UV curing to solidify the waveguide structure embedded in a rigid cladding.

Main Results:

• Successful fabrication of self-written optical connections using a single photopolymerizing resin.
• Demonstration of optical connections between single-mode and multi-mode optical fibers or waveguides.
• Evaluation of the influence of process parameters like writing speed and curing time on results.

Conclusions:

• The one-polymer approach significantly simplifies the fabrication of self-written optical connections.
• This method provides a viable route for producing robust optical waveguides for diverse applications.
• Further optimization of process parameters can enhance optical properties and coupling efficiencies.