All-fiber wavelength-tunable Ytterbium-doped mode-locked lasers based on fiber loop mirror

All-fiber wavelength-tunable fiber laser is a desirable light source architecture in many fields owing to their low cost, compactness and easy integration. However, most of them have independent filter elements and saturated absorption elements, which will undoubtedly increase the redundancy of laser. In this paper, we realize an all-fiber wavelength-tunable Ytterbium (Yb)-doped laser with the tunable central wavelength from 1023 nm to 1076 nm based on fiber loop mirror (FLM). The fiber loop (FLM) fused with two segments of polarization-maintaining fibers (PMF) acts as both a comb filter and a saturable absorber (SA). We believe that lasers with a simple structure and wide wavelength tuning range will have potential applications in sensing, communication, spectroscopy, and medicine.