Research of Fiber Pulse Laser Generation with Oblique Grown PbSe Nanosheets Saturable Absorber (Invited)

Based on the saturable absorption properties of narrow band gap semiconductor PbSe,saturable absorber devices are achieved by physical vapor deposition using pure PbSe powder as the precursor and transferred by optical fiber probe. And pulse fiber lasers with different wavelengths are built. By using a simple ring cavity in near infrared,the stable mode-locked output is realized with almost unchanged devices in the range of near-infrared 1 similar to 2 mu m, and the central wavelengths are 1060.46 nm, 1563.24 nm and 1908.34 nm respectively, the fundamental frequencies are 0.593 MHz, 13.59 MHz and 10.25 MHz separately, and the pulse widths are 30.53 ns, 4.26 ns and 1 ns respectively. This result expands the applications of the new nanocrystalline material lead selenide compound, provides a solution for the wavelength regulation of pulsed fiber laser, and satisfies the application requirements of multi-wavelength tunable laser in biomedical, monitoring and other places.