Titanium Disulfide Based Saturable Absorber for Generating Passively Mode-Locked and Q-Switched Ultra-Fast Fiber Lasers

Shang, Xinxin; Guo, Lin; Zhang, Hua Nian; Li, Deng Wang; Yue, Qing Yang

doi:10.3390/nano10101922

Cited by 71 publications

(18 citation statements)

References 56 publications

(55 reference statements)

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“…One is introducing the nonlinear polarization evolution (NPE) effect to the fiber laser by using a polarization-dependent component, such as a polarizer [5], tapered fiber [6][7][8], or D-shaped fiber [9]. The other is dispersion management with significantly increased cavity length [10][11][12][13][14][15][16][17][18][19][20]; however, the repetition frequency of the laser is greatly reduced. In addition to the dispersion and nonlinearity, the parameters of the SA can also affect the performance of the QS and ML laser.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Evolution from Q-Switching to Mode-Locking in an Erbium-Doped Fiber Laser Using Tungsten Trioxide Saturable Absorber

et al. 2022

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Passively Q-switching and mode-locking technologies can generate short pulses with durations that differ by several orders of magnitude widely used in different applications. Recently, Q-switching and mode-locking realized in an identical laser cavity with saturable absorbers was reported. The analysis of pulse conversion is helpful for us to further understand the pulse dynamics of a laser. In this paper, the pulse evolution from Q-switching, Q-switched mode-locking to mode-locking, is demonstrated by using a tungsten trioxide saturable absorber in a ring-cavity erbium-doped fiber laser. Firstly, self-started Q-switching at 1563 nm is observed, the repetition rate continuously increases, and the duration decreases when the pump power increased. Then, with an adjusting intra-cavity state of polarization under a high pump power level, stable Q-switched mode-locking pulses evolved from Q-switching, are observed. The amplitude of the emerged pulse sequence with a period of 36.8 ns, determined by cavity length, is modulated by the Q-switched envelope with the period of 10.3 μs. By optimizing the intracavity polarization carefully, stable continuous wave mode-locking operation is achieved eventually. To the best of our knowledge, this is the first experimental demonstration of Q-switching and mode-locking, respectively, in an identical transition-metal-oxides-based pulsed fiber laser without modification of cavity structure.

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Section: Introductionmentioning

confidence: 99%

Revealing the Evolution from Q-Switching to Mode-Locking in an Erbium-Doped Fiber Laser Using Tungsten Trioxide Saturable Absorber

et al. 2022

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“…However, the absorption of monolayer graphene is 2.3%, limiting its application and development in the field of optoelectronics [ 8 ]. Afterwards, transition metal disulfides (TMDs) [ 9 , 10 , 11 , 12 , 13 , 14 ], topological insulators [ 15 , 16 , 17 , 18 , 19 , 20 ], black phosphorus [ 21 , 22 , 23 , 24 ] and other 2D layered materials [ 25 , 26 , 27 , 28 , 29 , 30 ] with excellent saturable absorption have also been adopted in ultrafast photonics. These two-dimensional materials have a similar layered structure, in that the layers are connected through van der Waals forces, which provides the possibility to obtain single or multiple layers from the bulk materials.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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A ferromagnetic insulator Cr2Ge2Te6 as a saturable absorber in an Er-doped fiber laser (EDFL) was demonstrated. In this work, a CGT-PVA composite film was successfully fabricated using the liquid-phase exfoliation method and employed in an EDFL. The modulation depth and saturation intensity of the SA are 4.26% and 89.40 MW/cm2, respectively. Stable pulses with a minimum pulse width of 978.5 fs when the repetition rate was 3.25 MHz were recorded experimentally. Furthermore, stable solitons still need to be obtained when the pulse energy in the cavity is as high as 11.6 nJ. The results fully suggest that CGT has outstanding nonlinear absorption properties, which may have broad potential applications in ultrafast photons.

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“…Following the demand for stability and robustness in practical applications, real SA choosing is important [40][41][42][43][44]. GaS is an indirect bandgap semiconductor which possesses a crystal lattice with a hexagonal structure, each layer consisting of two Ga and two S closed-packed sublayers in the stacking sequence of S-Ga-Ga-S along the c axis [45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hexagonal Structured GaS Nanosheets for Robust Femtosecond Pulse Generation

Guo

Liu

et al. 2022

Nanomaterials

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Gallium sulfide (GaS), with a hexagonal structure, has received extensive attention due to its graphene-like structure and derived optical properties. Here, high-quality GaS was obtained via chemical vapor synthesis and then prepared as a saturable absorber by the stamp-assisted localization-transfer technique onto fiber end face. The stability of the material and the laser damage threshold are maintained due to the optimized thickness and the cavity integration form. The potential of the GaS for nonlinear optics is explored by constructing a GaS-based Erbium-doped mode-locked fiber laser. Stable femtosecond (~448 fs) mode-locking operation of the single pulse train is achieved, and the robust mode-locked operation (>30 days) was recorded. Experimental results show the potential of GaS for multi-functional ultrafast high-power lasers and promote continuous research on graphene-like materials in nonlinear optics and photonics.

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Titanium Disulfide Based Saturable Absorber for Generating Passively Mode-Locked and Q-Switched Ultra-Fast Fiber Lasers

Cited by 71 publications

References 56 publications

Revealing the Evolution from Q-Switching to Mode-Locking in an Erbium-Doped Fiber Laser Using Tungsten Trioxide Saturable Absorber

Revealing the Evolution from Q-Switching to Mode-Locking in an Erbium-Doped Fiber Laser Using Tungsten Trioxide Saturable Absorber

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

Synthesis of Hexagonal Structured GaS Nanosheets for Robust Femtosecond Pulse Generation

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