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Related Experiment Video

Updated: Oct 20, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

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Published on: September 30, 2019

Optical Fiber Based Mach-Zehnder Interferometer for APES Detection.

Huitong Deng¹, Xiaoman Chen¹, Zhenlin Huang¹

¹Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China.

Sensors (Basel, Switzerland)

|September 10, 2021

Summary

This summary is machine-generated.

This study presents a 3-aminopropyl-triethoxysilane (APES) fiber-optic sensor using a Mach-Zehnder interferometer (MZI). Optimized APES concentrations were determined for enhanced MZI biosensor performance.

Keywords:

APES detection Mach-Zehnder Interferometer condensation reaction optical fiber biosensor

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Last Updated: Oct 20, 2025

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

Area of Science:

Optoelectronics
Biosensing Technology
Materials Science

Background:

Fiber-optic sensors offer label-free detection capabilities.
Mach-Zehnder interferometers (MZIs) are sensitive to external environmental changes.
Surface functionalization is crucial for tailoring sensor specificity and performance.

Purpose of the Study:

To demonstrate a novel fiber-optic sensor utilizing 3-aminopropyl-triethoxysilane (APES) functionalization.
To investigate the relationship between APES concentration and MZI sensor performance.
To optimize APES coating for enhanced MZI biosensor sensitivity.

Main Methods:

Fabrication of a Mach-Zehnder interferometer (MZI) using a core-offset fusion single mode fiber (SMF) structure (3.0 cm length).
Functionalization of the MZI surface with varying concentrations of 3-aminopropyl-triethoxysilane (APES).
Measurement of transmission variations and resonance dip wavelength shifts to correlate APES amount with MZI interference.

Main Results:

The APES coating induced measurable changes in the MZI's interference pattern.
A direct relationship was established between the amount of APES and the resonance dip wavelength shift.
Optimized APES concentrations were found to be 3 mL for 1% solution and 1.5 mL for 2% solution for the 3.0 cm MZI.

Conclusions:

The APES-functionalized MZI fiber-optic sensor demonstrates a viable platform for sensitive detection.
Optimizing APES concentration is critical for maximizing the performance of MZI-based biosensors.
This approach provides a foundation for developing advanced fiber-optic biosensing applications.