An integrated dual-path mode-locked fiber laser source for dual-comb measurements

Abstract

This invention discloses an integrated dual-mode-locked fiber laser source for dual-comb measurements, comprising: a pump source, a wavelength division multiplexer (WDM), a rare-earth ion-doped fiber, a first optical circulator, and a second optical circulator. The pump source is coupled to the rare-earth ion-doped fiber via the WDM. The first and second optical circulators are respectively connected to the two ends of the rare-earth ion-doped fiber. The first optical circulator forms a first resonant cavity with a first group of mode-locking elements, and the second optical circulator forms a second resonant cavity with a second group of mode-locking elements. The first and second resonant cavities are optically isolated from each other by the directional transmission characteristics of the first and second optical circulators, and share the pump source and the rare-earth ion-doped fiber to synchronously output two mode-locked pulses. This invention can generate two highly coherent mode-locked pulses with independently adjustable parameters using a single pump source and a single gain medium, exhibiting high integration, good stability, and strong practicality.

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