Towards phase-stabilized Fourier domain mode-locked frequency combs

Christin Grill, Torben Blömker, Mark Schmidt, Dominic Kastner, Tom Pfeiffer, Jan Philip Kolb, Wolfgang Draxinger, Sebastian Karpf, Christian Jirauschek, Robert Huber*

*Corresponding author for this work
7 Citations (Scopus)


Fourier domain mode-locked (FDML) lasers are some of the fastest wavelength-swept light sources, and used in many applications like optical coherence tomography (OCT), OCT endoscopy, Raman microscopy, light detection and ranging, and two-photon microscopy. For a deeper understanding of the underlying laser physics, it is crucial to investigate the light field evolution of the FDML laser and to clarify whether the FDML laser provides a frequency comb structure. In this case, the FDML would output a coherent sweep in frequency with a stable phase relation between output colours. To get access to the phase of the light field, a beat signal measurement with a stable, monochromatic laser is performed. Here we show experimental evidence of a well-defined phase evolution and a comb-like structure of the FDML laser. This is in agreement with numerical simulations. This insight will enable new applications in jitter-free spectral-scanning, coherent, synthetic THz-generation and as metrological time-frequency ruler.

Original languageEnglish
Article number212
JournalCommunications Physics
Issue number1
Publication statusPublished - 12.2022

Research Areas and Centers

  • Academic Focus: Biomedical Engineering

DFG Research Classification Scheme

  • 205-32 Medical Physics, Biomedical Engineering


Dive into the research topics of 'Towards phase-stabilized Fourier domain mode-locked frequency combs'. Together they form a unique fingerprint.

Cite this