Ultrafast Photonics of Ternary Re_xNb_(1–x)S₂ in Fiber Lasers

Abstract

Two-dimensional (2D) transition metal chalcogenides (TMCs) become more attractive upon addition of a third element owing to their unique structure and remarkable physical and chemical properties, which endow these materials with considerable potential for applications in nanoscale devices. In this work, a Re x Nb(1–x)S2-based saturable absorber (SA) device for ultrafast photonics applications is studied. The device is assembled by placing Re x Nb(1–x)S2 nanosheets with a thickness of 1–3 nm onto a microfiber to increase their compatibility with an all-fiber laser cavity. The prepared Re x Nb(1–x)S2-based device exhibits a modulation depth of 24.3%, a saturation intensity of 10.1 MW/cm2, and a nonsaturable loss of 28.5%. Furthermore, the Re x Nb(1–x)S2-based device is used to generate ultrashort pulses in an erbium-doped fiber (EDF) laser cavity. At a pump power of 260 mW, the EDF laser operates in a conventional soliton mode-locked region. The pulse width is 285 fs, and the repetition frequency is 61.993 MHz. In particular, the bound-state soliton mode-locking operation is successfully obtained in a pump power range of 300–900 mW. The bound-state pulses are formed by doubling identical solitons with a temporal interval of 0.8 ps. The output power is as high as 47.9 mW, and the repetition frequency is 123.61 MHz. These results indicate that the proposed Re x Nb(1–x)S2-based SAs have comparable properties to currently used 2D SAs and provide a basis for their application in the field of ultrafast photonics.

MOF‐Derived Porous Dodecahedron rGO‐Co3O4 for Robust Pulse Generation

“…In the past few years, some emerging materials, such as perovskites [ 1 ] and two‐dimensional materials (bismuthene, [ 2 ] graphene, [ 3 ] SnSe 2 , [ 4 ] transition metal chalcogenides, [ 5 ] etc. ), owing to their fascinating chemical and physical properties, have been in a state of vigorous development and rapid advances for applications in optoelectronics, biology, catalysis and energy.…”

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SnSe 2 , [4] transition metal chalcogenides, [5] etc. ), owing to their fascinating chemical and physical properties, have been in a state of vigorous development and rapid advances for applications in optoelectronics, biology, catalysis and energy.

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Advanced Biomaterials for Regulating Polarization of Macrophages in Wound Healing

“…In recent years, scholars have incorporated some inorganic ions into biological materials to improve their inflammatory microenvironment and angiogenesis, such as, calcium (Ca), Zirconium (Zr), lithium (Li), Europium (Eu), cobalt (Co), copper (Cu), and strontium (Sr). [ 127–129,145–147 ] Libin Pang et al. [ 147 ] developed a composite system (SF‐MA‐BS) consisting of borosilicate (BS) and silk fibroin (SF) hydrogels modified with methacryloyloxy (MA), as shown in Figure A.…”

“…[ 127–129,145–147 ] Libin Pang et al. [ 147 ] developed a composite system (SF‐MA‐BS) consisting of borosilicate (BS) and silk fibroin (SF) hydrogels modified with methacryloyloxy (MA), as shown in Figure A. SF is a bio‐compatible amino acid polymer that is similar in structure and composition to natural ECM.…”

“…Reproduced with permission. [ 147 ] Copyright 2021, American Chemical Society. B) Graphical abstract: Monodisperse strontium‐containing bioactive glass microspheres (SrBGM) remarkably boost early vascularization by modulating macrophage phenotype; macrophage polarization and promotion of angiogenic potential after 3 days of culture with control, BGM, SrBGM, and SrCl2.…”