Related Experiment Video
Updated: May 5, 2026
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
Stable dual-wavelength-switchable ultra-narrow linewidth thulium-holmium co-doped fiber laser based on a
None:
This paper proposes and evaluates a stable dual-wavelength-switchable, ultra-narrow linewidth, single-longitudinal-mode (SLM) thulium-holmium co-doped fiber laser (THDFL) based on self-injection locking (SIL) mechanism. A mode-selection filter is manufactured to ensure stable SLM output over 60 minutes. In addition, the SIL mechanism allows the THDFL to generate laser emission with an ultra-narrow linewidth, leading to a linewidth (measured by the β-separation line method) of 0.09 kHz at an integration time of 0.002 s. By tuning the polarization controller, THDFL can generate stable ultra-narrow linewidth SLM outputs at 1941.76 nm and 1942.17 nm, with optical signal-to-noise ratio greater than 72 dB. Moreover, when the frequency is equal to 500 kHz (or higher), the measured relative intensity noise is less than -130 dB/Hz. Finally, key performance parameters, including the relationship between the linewidth and both the delay fiber length and the injection power, are studied.
