Low attenuation soft and stretchable elastomeric optical waveguides

Low-attenuation polymeric waveguides transmit signals efficiently. Stretchable, cost-effective, and lightweight elastomeric optical waveguides (EOWs) were fabricated by one-step slow melt-extrusion, which induces slower crystallization kinetics and greater crystal nucleation to form uniform and greater defect-free crystals. Structurally homogeneous EOWs have attenuation coefficients of 0.194 dB/cm using a power meter and 0.268 dB/cm using time-of-flight sensor (ToFS). Higher AC in latter method is attributed to crosstalk and propagation of fewer modes in bent configuration. Softer and stretchable EOWs with higher optical transmittance could be used for wearable sensors and soft robotics.