Water waves detection by utilizing optical fiber surface microchannel sensor

The present study utilizing the laser technique to create the microchannel on the fiber surface to fabricate sensor for the water waves measuring purpose. The sensor fabrication involves specialized techniques of UV laser to process the fiber for creating a microchannel on the fiber surface. The sensor fabrication is result into partially removal of cladding of the fiber at specific portion of the fiber with measured dimensions. The partially removal of cladding lead to expose the fiber core region, where surrounding medium act as a temporary cladding. The presence of water waves has influence to change the refractive index of the surrounding medium dynamically. The continually change in refractive index affecting the light propagation to fluctuate in the optical power. These fluctuations in optical power are measured using a power meter connected to the fiber end. The results demonstrate that the sensor effectively detects the water waves by the optical power intensity variations. The water waves at the peak and trough of (4 to −4 cm) are detected by the optical power intensity fluctuations of 42.5 µW. Where, the sensor is highly sensitive to detect the water waves movement at the time interval of the 0.1 Second. The water waves detection at such a fast response attributes the sensor design which is greater achievement based on the polymer optical fiber sensor design.