A High-Sensitive Pressure Sensor Using a Single-Mode Fiber Embedded Microbubble with Thin Film Characteristics.

Area of Science:

• Optoelectronics
• Fiber optics
• Sensor technology

Background:

• Traditional pressure sensors often face limitations in sensitivity, cost, or temperature stability.
• Developing robust and sensitive pressure sensing devices is crucial for various industrial and scientific applications.

Purpose of the Study:

• To propose and analyze a new fiber optic pressure sensor based on a silica hollow microbubble.
• To demonstrate a simple, low-cost, and controllable fabrication method for the proposed sensor.

Main Methods:

• Fabrication of a silica hollow microbubble using a commercial arc fusion splicer and pressure-assisted arc discharge.
• Integration of a single-mode fiber into the microbubble to create a fiber Fabry-Perot interferometer.
• Measurement of the reflected interference spectrum to analyze sensor performance.

Main Results:

• The fabricated sensor exhibits a high pressure sensitivity of 164.56 pm/kPa.
• The sensor demonstrates a low temperature sensitivity of 4 pm/°C, indicating temperature insensitivity.
• The fabrication process is confirmed to be simple, cost-effective, and easy to control.

Conclusions:

• The proposed fiber optic pressure sensor offers a promising solution for accurate pressure monitoring.
• The sensor's high sensitivity and temperature insensitivity make it suitable for demanding environments.
• The straightforward fabrication method facilitates potential for widespread adoption and further development.