Optical Coherence Spectro-Tomography by all-Optical Depth-Wavelength analysis

Luc Froehly (1) , Malha Ouadour (1) , Luca Furfaro (1) , Patrick Sandoz (1) , Tijani Gharbi (1) , Philippe Leproux (2) , Guillaume Huss (2) , Vincent Couderc (2)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 PHOTONIQUE

Current spectroscopic optical coherence tomography (OCT) methods rely on a posteriori numerical calculation. We present an alternative for accessing optically the spectroscopic information in OCT, i.e. without any post-processing, by using a grating based correlation and a wavelength demultiplexing system. Conventional A-scan and spectrally resolved A-scan are directly recorded on the image sensor. Furthermore, due to the grating based system, no correlation scan is necessary. In the frame of this paper we present the principle of the system as well as first experimental results.

Mots clés: Tomographie optique spectroscopique; réseau de diffraction; corrélation

Domaines: Optique [physics.optics]

Luc Froehly, Malha Ouadour, Luca Furfaro, Patrick Sandoz, Tijani Gharbi, et al.. Optical Coherence Spectro-Tomography by all-Optical Depth-Wavelength analysis. 2006. ⟨hal-00115283⟩