21 February 2017 Analysis of FDML lasers with meter range coherence
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FDML lasers provide sweep rates in the MHz range at wide optical bandwidths, making them ideal sources for high speed OCT. Recently, at lower speed, ultralong-range swept-source OCT has been demonstrated using a tunable vertical cavity surface emitting laser (VCSEL) and also using a Vernier-tunable laser. These sources provide relatively high sweep rates and meter range coherence lengths. In order to achieve similar coherence, we developed an extremely well dispersion compensated Fourier Domain Mode Locked (FDML) laser, running at 3.2 MHz sweep rate and 120 nm spectral bandwidth. We demonstrate that this laser offers meter range coherence and enables volumetric long range OCT of moving objects.
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Tom Pfeiffer, Tom Pfeiffer, Wolfgang Draxinger, Wolfgang Draxinger, Wolfgang Wieser, Wolfgang Wieser, Thomas Klein, Thomas Klein, Markus Petermann, Markus Petermann, Robert Huber, Robert Huber, } "Analysis of FDML lasers with meter range coherence", Proc. SPIE 10053, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXI, 100531T (21 February 2017); doi: 10.1117/12.2254792; https://doi.org/10.1117/12.2254792

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