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

doi:10.1364/BOE.422898

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^*

^*Corresponding author for this work

Institute of Biomedical Optics

6 Citations (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.

Original language	English
Journal	Biomedical Optics Express
Volume	12
Issue number	5
Pages (from-to)	2604-2616
Number of pages	13
DOIs	https://doi.org/10.1364/BOE.422898
Publication status	Published - 05.2021

Funding

Funded by European Union (ERC CoG no. 646669); German Research Foundation (HU1006/6 270871130, EXC 2167-390884018); German Federal Ministry of Education and Research (BMBF no. 13GW0227B: "Neuro-OCT") and the state of Schleswig-Holstein, Germany (Excellence Chair Program by the universities of Kiel and Luebeck).

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

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10.1364/BOE.422898

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title = "Cavity length control for Fourier domain mode locked (FDML) lasers with μm precision",

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.",

author = "Simon Lotz and Christin Grill and Madita Gob and Wolfgang Draxinger and Kolb, \{Jan Philip\} and Robert Huber",

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T1 - Cavity length control for Fourier domain mode locked (FDML) lasers with μm precision

AU - Lotz, Simon

AU - Grill, Christin

AU - Gob, Madita

AU - Draxinger, Wolfgang

AU - Kolb, Jan Philip

AU - Huber, Robert

PY - 2021/5

Y1 - 2021/5

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85105281965

U2 - 10.1364/BOE.422898

DO - 10.1364/BOE.422898

M3 - Journal articles

AN - SCOPUS:85105281965

SN - 2156-7085

VL - 12

SP - 2604

EP - 2616

JO - Biomedical Optics Express

JF - Biomedical Optics Express

IS - 5

ER -

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

Abstract

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