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Updated: Nov 11, 2025

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

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Published on: May 11, 2014

Interferometric optical fiber sensor for optoacoustic endomicroscopy.

Okan Ülgen^1,2, Rami Shnaiderman^1,2, Christian Zakian^1,2

¹Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, Munich, Germany.

Journal of Biophotonics

|March 27, 2021

Summary

We developed a low-cost method to create optical fiber ultrasound sensors using UV-curable adhesives and silver deposition. These high-performance, disposable sensors offer superior detection for biomedical applications.

Keywords:

Fabry-Pérot interferometer endomicroscopy optical fiber sensor optical resonator optoacoustic imaging ultrasound transducer

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Last Updated: Nov 11, 2025

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Area of Science:

Biomedical Engineering
Optical Sensing
Acoustic Detection

Background:

Optical fiber sensors offer robust, miniaturized detection of wideband ultrasound with high sensitivity and electromagnetic interference immunity.
Current limitations in cost-effective manufacturing hinder the widespread adoption of optical fiber ultrasound sensors in biomedical fields.

Purpose of the Study:

To develop and optimize a simple, low-cost manufacturing method for optical fiber-based ultrasound sensors.
To enable the production of high-quality Fabry-Pérot interferometers on optical fiber tips for acoustic sensing.

Main Methods:

Micro-manipulation of UV-curable optical adhesives.
Electroless chemical silver deposition to create high-quality mirrors for optical cavities.
Fabrication of Fabry-Pérot interferometer sensors on optical fiber tips.

Main Results:

Successful development of a cost-effective manufacturing process for optical fiber ultrasound sensors.
Characterization revealed a sensor with a low Noise Equivalent Pressure (NEP) and a broad detection bandwidth (25 MHz).
The developed sensor demonstrated performance exceeding conventional piezoelectric transducers in optoacoustic imaging.

Conclusions:

The novel manufacturing process enables the creation of high-performance, low-cost optical fiber acoustic detectors.
The affordability of these sensors makes them suitable for disposable use in biomedical applications.
This advancement can significantly broaden the application of optical fiber sensors in ultrasound detection.