title: Dual femtosecond laser multiheterodyne optical coherence tomography.
abstract: A time domain optical coherence tomography (OCT) system without moving parts is described, which is based on multiheterodyning utilizing two mode-locked femtosecond lasers. By synchronizing the two lasers to slightly different repetition rates and coupling to an interferometric OCT setup, we obtain amplitude-modulated beat signals representing the structure of the specimen under investigation. Our system is suitable for biological imaging as well as technical applications. We demonstrate high axial imaging depths of 150 mm with up to 5000 axial scans per second, achieving equivalent path scanning velocities of 750 m/s.
authors.affiliation: Institut für Halbleitertechnik, Rheinisch-Westfälische Technische Hochschule Aachen, Sommerfeldstrasse 24, Aachen, Germany. kray@iht.rwth-aachen.de
authors.forename: Stefan
authors.initials: S
authors.lastname: Kray
authors.forename: Felix
authors.initials: F
authors.lastname: Spöler
authors.forename: Michael
authors.initials: M
authors.lastname: Först
authors.forename: Heinrich
authors.initials: H
authors.lastname: Kurz