Ultra low noise Fourier domain mode locked laser for high quality megahertz optical coherence tomography | Zendy

Tom Pfeiffer | Zendy; Markus Petermann | Zendy; Wolfgang Draxinger | Zendy; Christian Jirauschek | Zendy; Robert Huber | Zendy

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

Author(s) -

Tom Pfeiffer,

Markus Petermann,

Wolfgang Draxinger,

Christian Jirauschek,

Robert Huber

Publication year - 2018

Publication title -

biomedical optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.362

H-Index - 86

ISSN - 2156-7085

DOI - 10.1364/boe.9.004130

Subject(s) - optical coherence tomography , optics , coherence (philosophical gambling strategy) , laser , image quality , noise (video) , fourier transform , physics , materials science , computer science , artificial intelligence , quantum mechanics , image (mathematics)

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.

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