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

被引：5
|
作者：
Lotz, Simon [1 ,2 ]
Grill, Christin [1 ]
Goeb, Madita [1 ]
Draxinger, Wolfgang [1 ]
Kolb, Jan Philip [1 ]
Huber, Robert [1 ]
机构：
[1] Univ Lubeck, Inst Biomed Opt, Peter Monnik Weg 4, D-23562 Lubeck, Germany
[2] Med Laserzentrum Lubeck GmbH, Peter Monnik Weg 4, D-23562 Lubeck, Germany
来源：
BIOMEDICAL OPTICS EXPRESS | 2021年 / 12卷 / 05期
基金：
欧洲研究理事会;
关键词：
OPTICAL COHERENCE TOMOGRAPHY; HEARTBEAT OCT; MEGAHERTZ OCT; LOCKING; NOISE; 3D; THERMOMETRY;
D O I：
10.1364/BOE.422898
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
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 similar to 0.18 mHz at a sweep repetition rate of similar to 418 kHz which corresponds to a ratio of 4x10(-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. (c) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：2604 / 2616
页数：13
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