Light sensor based on carbon tetrachloride-infiltrated side-hole fiber

Area of Science:

• Photonics and optical sensing
• Materials science
• Fiber optics

Background:

• Optical sensors are crucial for precise measurements in various scientific fields.
• Developing cost-effective and highly sensitive sensors remains an active area of research.
• Side-hole optical fibers offer unique platforms for creating novel sensing devices.

Purpose of the Study:

• To propose and demonstrate a high-sensitivity light sensor based on a side-hole optical fiber.
• To investigate the sensor's performance for temperature and laser light intensity measurements.
• To evaluate the sensor's fabrication feasibility and cost-effectiveness.

Main Methods:

• Filling a side-hole optical fiber with carbon tetrachloride using a selective glue coating method.
• Utilizing selective glue coating to create a liquid waveguide within the fiber.
• Analyzing the coupling between liquid waveguide modes and core propagation modes for spectral shifts.

Main Results:

• Achieved a temperature sensitivity of up to 46 nm/°C.
• Demonstrated laser light intensity measurement sensitivity of 0.114 nm/(mW/cm²).
• Observed resonant dips in the transmission spectrum due to mode coupling.

Conclusions:

• The developed side-hole optical fiber sensor exhibits high sensitivity and cost-effectiveness.
• The sensor is suitable for high-precision laser power measurement and optical modulation applications.
• This technology holds potential for laser manipulation and optical switching.