Ultra low noise fourier domain mode locked laser for high quality megahertz optical coherence tomography

T. O.M. Pfeiffer, Markus Petermann, Wolfgang Draxinger, Christian Jirauschek, Robert Huber

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

We investigate the origin of high frequency noise in Fourier domain mode locked (FDML) lasers and present an extremely well dispersion compensated setup which virtually eliminates intensity noise and dramatically improves coherence properties. We show optical coherence tomography (OCT) imaging at 3.2 MHz A-scan rate and demonstrate the positive impact of the described improvements on the image quality. Especially in highly scattering samples, at specular reflections and for strong signals at large depth, the noise in optical coherence tomography images is significantly reduced. We also describe a simple model that suggests a passive physical stabilizing mechanism that leads to an automatic compensation of remaining cavity dispersion in FDML lasers.

Original languageEnglish
Article number#328420
Pages (from-to)4130-4148
Number of pages19
JournalBiomedical Optics Express
Volume9
Issue number9
DOIs
StatePublished - 1 Sep 2018

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