Fabrication and diameter analysis of a single-ended SMF tip structure

Area of Science:

• Optoelectronics
• Nanotechnology
• Biomedical Engineering

Background:

• Surface plasmon resonance (SPR) combined with optical fiber technology offers sensitive detection of various parameters.
• Developing highly sensitive optical fiber biosensors is crucial for advanced diagnostics.
• Existing hybrid optical fiber structures aim to improve biosensor sensitivity.

Purpose of the Study:

• To fabricate a novel optical fiber tip structure for enhanced biosensing.
• To investigate the efficiency of wet etching for creating sensitive fiber structures.
• To enable rapid and precise detection of chemical, biochemical, and biological parameters.

Main Methods:

• Fabrication of an optical fiber tip structure on single-mode fiber (SMF).
• Utilizing a 40% hydrofluoric acid solution for wet etching at room temperature.
• Measuring the diameter of the fabricated fiber tip using a compound microscope.

Main Results:

• Successful fabrication of a tapered optical fiber tip structure.
• The wet etching method proved efficient for creating the desired fiber geometry.
• The fabricated structure is suitable for developing highly sensitive optical fiber biosensors.

Conclusions:

• Wet etching is an effective method for fabricating sensitive optical fiber tip structures.
• The developed structure holds promise for advancing optical fiber-based biosensor technology.
• This approach facilitates precise detection of chemical and biological analytes.