Temperature Insensitive Vector Bending Sensor Based on Asymmetrical Cascading SMF-PCF-SMF Structure
A temperature insensitive vector curvature sensor of photonic crystal fiber (PCF) is presented based on core-offset Anti-Vibration Mount splicing and waist-enlarged fiber taper.Obvious red and blue shifts in transmission spectrum appear at two symmetrical bending directions with sensor length of 10, 13, 16, and 19 mm and vector curvature of 0.12-1.