Work

Rapid spectral shaping for time domain and swept source full field OCT

Year: 2025

Type: article

Abstract: Full-field optical coherence tomography (FFOCT) has recently regained attention thanks to the development of high-resolution dynamic OCT and cross-talk-free swept source FFOCT. However, the choice of wavelength and axial resolution is often a limiting factor with few existing commercial solutions. Here, we developed a novel method to provide rapid spectral shaping for FFOCT imaging. Combining a supercontinuum laser, a fast controllable acousto-optic tunable filter (AOTF), and a multimode fiber with passive and active mode mixing, we obtained an extremely flexible light source compatible with FFOCT. By tuning the AOTF frequency and integrating the resulting wavelength over one camera exposure time, it becomes possible to build any spectrum of interest in the 575-1000 nm range in time domain FFOCT. Alternatively, the designed source module enables achieving swept source FFOCT at up to 100 kfps at an unprecedented axial resolution of 1.1 μm .

Source: Biomedical Optics Express

DOI: 10.1364/boe.574799

Authors: Dimitri Roueff, Pedro Mecê, Olivier Thouvenin

Institutions: Centre National de la Recherche Scientifique, Université Paris Sciences et Lettres, Institut Langevin, ESPCI Paris

Language: English

Topic: Optical Coherence Tomography Applications

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,913

Funder: Agence Nationale de la Recherche