Wavelength Tunable Pulsed Lasers Enabled by a Versatile Metafiber Functioning as Both Saturable Absorber and Filter (Adv. Sci. 3/2026)

Wavelength Tunable Pulsed Lasers A 3D metafiber that simultaneously functions as a saturable absorber and a spectral filter is inserted into the laser cavity, enabling Q-switched pulse generation and wavelength-tunable operation. This structure avoids the structural complexity of traditional hybrid systems while ensuring stable laser operation, offering a promising route for high-performance wavelength-tunable pulsed lasers. More details can be found in the Research Article by Bo Fu, Lei Zhang, Min Qiu, and co-workers (DOI: 10.1002/advs.202511572).