Ternary Transition Metal Dichalcogenides for High Power Vector Dissipative Soliton Ultrafast Fiber Laser

Abstract

2D ternary transition metal dichalcogenides (TMDCs) have been studied widely by researchers from the fields of nanotechnology to materials science because of the extraordinary chemical/physical characteristics, and significant potential in nanoscale device applications. Here, the application of Nb x Re (1−x) S 2 nanosheets in ultrafast photonics is studied. The few-layer Nb x Re (1−x) S 2 nanosheets are fabricated through liquid phase exfoliation method and a Nb x Re (1−x) S 2 -microfiber device is constructed by depositing these nanosheets onto the tapered region of a microfiber. After incorporating the Nb x Re (1−x) S 2 -microfiber saturable absorber (SA) into a net positive dispersion Er-doped fiber (EDF) laser cavity, the generation of stable dissipative soliton pulses with a pulse duration of 1.03 ps proved as polarization-locked vector solitons upon further study. With pump power growing to 900 mW, the average output power increases to 116.9 mW without pulse splitting. Besides, the pulse width can be compressed to 149.6 fs outside the cavity by using a single-mode fiber. Compared with previous works based on 2D materials-based saturable absorbers, the Nb x Re (1−x) S 2 -based mode-locked fiber laser proposed herein, reveals superior comprehensive performance.

Efficient Saturable Absorber Based on Ferromagnetic Insulator Cr2Ge2Te6 in Er-Doped Mode-Locked Fiber Laser

“…Many studies examining ultrafast fiber lasers based on 2D TMDs as SAs have been reported [ 34 , 35 , 36 , 37 ]. However, TMDs devices are not suited for the mid-infrared region, since the intrinsic energy bandgap of TMDs is limited from 1 to 2 eV [ 38 ]. BP has attracted great interest in both potential applications and academic research recently, benefiting from its remarkable characteristics.…”

Yttrium Oxide (Y2O3) as a Pulse Initiator in a Mode-Locking Erbium-Doped Fiber Laser

“…This is because the addition of the third element owing to their unique structure and remarkable physical and chemical properties endow these materials with considerable potential for applications in nanoscale devices. Re x Nb (1−x) S 2 -based saturable absorber (SA) and Nb x Re (1−x) S 2 nanosheets are the examples that have been used for SA in the generation of ultrashort pulses in EDF laser cavity [16,17]. Recently, Liu et al demonstrated the soliton mode-locked using a tapered fiber based saturable absorber as an enhancement to nonlinearity with different thickness of Y 2 O 3 layer, namely 5 nm, 8 nm, and 20 nm acting as a material for an ultrafast laser generation [18].…”

Intense continuous‐wave laser and mode‐locked pulse operation from Yb3+‐doped oxyfluoride glass–ceramic fibers

“…High‐performance glass fiber laser has gained increasing attention due to its unique superiorities, including high beam quality, adequate reliability, and good heat dissipation, showing potential applications in material processing, optical communication, nonlinear optics, and quantum optics 1–4 . Compared with a continuous wave (CW) fiber laser, ultrashort pulsed fiber laser with high peak power, high output energy, high repetition frequency, and wide frequency spectrum has attracted great attention because of its widespread applications in micromachining, optical information processing, biomedicine, and spectroscopy 5–8 . The ultrafast laser operating at ∼1 µm is located in the near‐infrared‐Ⅱ biological window (900–1700 nm) and has low optical attenuation for most biological specimens; thus it can increase two‐photon excitation imaging rate to obtain high contrast image in deep specimens 9 .…”

“…[1][2][3][4] Compared with a continuous wave (CW) fiber laser, ultrashort pulsed fiber laser with high peak power, high output energy, high repetition frequency, and wide frequency spectrum has attracted great attention because of its widespread applications in micromachining, optical information processing, biomedicine, and spectroscopy. [5][6][7][8] The ultrafast laser operating at ∼1 µm is located in the near-infrared-II biological window (900-1700 nm) and has low optical attenuation for most biological specimens; thus it can increase two-photon excitation imaging rate to obtain high contrast image in deep specimens. 9 Among the active centers, rare-earth (RE) ion Yb 3+ can achieve efficient ∼1-µm laser output because of the 2 F 5/2 → 2 F 7/2 transition.…”