Fourier Domain Mode Locked Laser and Its Applications

Dongmei Huang, Yihuan Shi, Feng Li*, Alex Wai

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

11 Citations (Scopus)


The sweep rate of conventional short-cavity lasers with an intracavity-swept filter is limited by the buildup time of laser signals from spontaneous emissions. The Fourier domain mode-locked (FDML) laser was proposed to overcome the limitations of buildup time by inserting a long fiber delay in the cavity to store the whole swept signal and has attracted much interest in both theoretical and experimental studies. In this review, the theoretical models to understand the dynamics of the FDML laser and the experimental techniques to realize high speed, wide sweep range, long coherence length, high output power and highly stable swept signals in FDML lasers will be discussed. We will then discuss the applications of FDML lasers in optical coherence tomography (OCT), fiber sensing, precision measurement, microwave generation and nonlinear microscopy.

Original languageEnglish
Article number3145
Number of pages35
Issue number9
Early online date20 Apr 2022
Publication statusPublished - May 2022

Scopus Subject Areas

  • Analytical Chemistry
  • Information Systems
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

User-Defined Keywords

  • swept laser
  • Fourier domain mode-locking
  • instability
  • frequency/time discretization
  • laser and optics system


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