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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

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Versatile Multimodality Imaging System Based on Detectorless and Scanless Optical Feedback Interferometry-A

Massimo Brambilla¹, Lorenzo Luigi Columbo¹, Maurizio Dabbicco¹

¹Dipartimento di Fisica "Michelangelo Merlin", Università degli Studi e Politecnico di Bari, and IFN CNR, sede di Bari, via Amendola 173, 70126 Bari, Italy.

Sensors (Basel, Switzerland)

|October 23, 2020

Summary

Optical feedback interferometry offers versatile sensing and imaging applications. This review highlights its potential for new developments across various wavelengths and laser types.

Keywords:

laser self-mixing optical feedback interferometry semiconductor lasers

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Area of Science:

Optics and Photonics
Interferometry
Sensing and Imaging Technologies

Background:

Fifteen years of research in optical feedback interferometry (OFI) are reviewed.
OFI demonstrates significant versatility and largely untapped potential.
The compendium aims to guide readers toward new OFI developments.

Purpose of the Study:

To provide a comprehensive overview of optical feedback interferometry research.
To highlight the broad applicability of OFI in sensing and imaging.
To inspire specialists with novel applications and future research directions.

Main Methods:

Review of research spanning fifteen years in optical feedback interferometry.
Exploration of diverse wavelengths (0.4-120 μm) and semiconductor laser types (Fabry-Perot, DFB, VCSEL, QCL).
Investigation of unconventional applications including multi-axis displacement, ablation front monitoring, and self-referenced measurements.

Main Results:

Demonstration of OFI's adaptability across a wide spectrum of wavelengths and laser sources.
Successful implementation of OFI in advanced sensing and imaging techniques.
Identification of novel applications such as structured light feedback imaging and compressive sensing.

Conclusions:

Optical feedback interferometry is a highly versatile technology with extensive potential for sensing and imaging.
The diverse range of wavelengths, laser types, and applications showcases OFI's adaptability.
Further research in OFI promises significant advancements in scientific and technological fields.