Cavity length control for Fourier domain mode locked (FDML) lasers with μm precision

Simon Lotz, Christin Grill, Madita Gob, Wolfgang Draxinger, Jan Philip Kolb, Robert Huber*

*Korrespondierende/r Autor/-in für diese Arbeit
1 Zitat (Scopus)

Abstract

In highly dispersion compensated Fourier domain mode locked (FDML) lasers, an ultra-low noise operation can only be achieved by extremely precise and stable matching of the filter tuning period and light circulation time in the cavity. We present a robust and high precision closed-loop control algorithm and an actively cavity length controlled FDML laser. The cavity length control achieves a stability of ∼0.18 mHz at a sweep repetition rate of ∼418 kHz which corresponds to a ratio of 4×10-10. Furthermore, we prove that the rapid change of the cavity length has no negative impact on the quality of optical coherence tomography using the FDML laser as light source.

OriginalspracheEnglisch
ZeitschriftBiomedical Optics Express
Jahrgang12
Ausgabenummer5
Seiten (von - bis)2604-2616
Seitenumfang13
DOIs
PublikationsstatusVeröffentlicht - 05.2021

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