Flexible polymeric rib waveguide with self-align couplers system

Area of Science:

• Optoelectronics
• Materials Science
• Biomedical Engineering

Background:

• Polymer-based waveguides offer advantages in flexibility and biocompatibility.
• Efficient light coupling is crucial for integrated optical systems.
• Cost-effective fabrication methods are needed for widespread adoption.

Purpose of the Study:

• To develop a polymeric rib waveguide with a U-shaped self-align fiber coupler system.
• To utilize a simple and cost-effective micromolding process.
• To evaluate the suitability of polydimethylsiloxane for optical sensing applications.

Main Methods:

• A micromolding process was employed using SU8 as the molding material.
• Polydimethylsiloxane was used as the waveguide material due to its optical and physical properties.
• A U-shaped self-align fiber coupler system was integrated into the waveguide design.

Main Results:

• The fabricated waveguide exhibited good optical transparency, low surface tension, biocompatibility, and durability.
• The micromolding technique minimized material and manufacturing costs.
• The self-align fiber coupler system facilitated fast and simple light coupling.

Conclusions:

• The developed polymeric waveguide system is a cost-effective and efficient solution for optical coupling.
• The flexible nature of polydimethylsiloxane makes the system suitable for wearable optical sensors.
• This fabrication technique holds promise for low-cost, high-performance optoelectronic devices.