13.4 MHz FDML Laser for Intra-Surgical Optical Coherence Tomography


Fourier domain mode locked (FDML) lasers are rapidly swept laser sources which are predominantly used for optical coherence tomography (OCT), a non-invasive depth resolving imaging modality [1]. State of the art FDML lasers achieve sweep repetition rates up to 5.2 MHz enabling MHz-OCT with video update rates and meter long coherence lengths allowing for working distances of several centimeters [2], [3]. Recently, researchers are pursuing the goal to implement MHz-OCT into surgical microscopes assisting the surgeon to get intra-operative guidance and identification of tumor infiltration [4]. During surgery, high resolution OCT-volumes (>1024x1024 A-Scans) with video update rates (>24 fps) are required which is a speed beyond the standard MHz-OCT capabilities. These prerequisites demand A-Scan rates exceeding 10 MHz. To meet these requirements, we present an FDML laser with 13.4 MHz sweep repetition rate sweeping over 113 nm centered at 1300 nm.
Original languageEnglish
Title of host publication2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
Number of pages1
Publication date04.2023
Publication statusPublished - 04.2023


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