MoS<sub>2</sub> nano-flake doped polyvinyl alcohol enabling polarized soliton mode-locking of a fiber laser

Chen, Ting-Hui; Lin, Chun‐Yen; Lin, Yung-Hsiang; Chi, Yu‐Chieh; Cheng, Chih-Hsien; Luo, Zhengqian

doi:10.1039/c6tc02623k

Cited by 19 publications

(6 citation statements)

References 56 publications

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“…The polarization angles of QWPs were adjusted to self-start the EDFL pulsation. Subsequently, the angles of HWPs were detuned to realize the tolerance of polarization angle for enabling the passive mode-locking [44,45]. 2g related vibrational mode attributed to an in-plane motion of Mo atoms, whereas another vibrational mode for A 1g related Raman scattering peak located at 405 cm −1 originates from the out-ofplane vibration of S atoms [29].…”

Section: Optimization Of Hybrid Npr and Sa Mode-locking Through Numer...mentioning

confidence: 99%

Incorporating MoS₂ saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers

et al. 2018

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Stabilized hybrid mode-locking of erbium-doped fiber laser (EDFL) by incorporating strong MoS2 saturable absorber and weak nonlinear polarization rotation (NPR) is demonstrated. At threshold condition, the MoS2 starts the mode-locking of EDFL to provide a 680 fs wide pulsewidth with a time-bandwidth product of 0.407. With only the unintentionally weak NPR effect, the fluctuated EDFL pulsewidth ranged between 377 and 382 fs is observed with a tolerant half-wave-plate orientation angle of θHWP =21°. Adding MoS2 enhances the self-amplitude modulation (SAM) and shortens a pulsewidth to 305–330 fs with an allowable θHWP increasing up to 76°, implying the enhanced stabilization of passively mode-locking in EDFL. Enduing the weak NPR with strong saturable absorption (SA) effect significantly makes up the maximal SAM coefficient from 4.02 × 10−4 to 1 × 10−3, whereas the self-phase modulation (SPM) coefficient remains unaltered as that without adding the MoS2. The MoS2 saturable absorber additively offsets SAM beyond its threshold to enlarge the polarization tolerance without altering the SPM. Adjusting the polarization controller with unintentional polarization dependence affects the NPR induced polarization dependent loss so as to strengthen the SAM for mandatory mode-locking optimization of EDFL.

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Section: Optimization Of Hybrid Npr and Sa Mode-locking Through Numer...mentioning

confidence: 99%

Incorporating MoS₂ saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers

et al. 2018

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“…Passively mode-locked fiber lasers self-started by exploiting a variety of saturable absorbers (SAs) have been investigated for decades [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. These SAs include carbon-based materials, such as carbon nanotubes (CNTs) [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ], graphene [ 18 , 19 , 20 , 21 , 22 , 23 ], graphite [ 24 , 25 , 26 , 27 , 28 ] and charcoal nanoparticles [ 29 , 30 , 31 ], and topological insulators, such as molybdenum disulfide (MoS 2 ) [ 32 , 33 , 34 , 35 ], antimony telluride (Sb 2 Te 3 ) [ 36 ], Bi 2 Te 3 [ 37 , 38 , 39 ], and bismuth selenide (Bi 2 Se 3 ) [ 40 , 41 ], etc. In addition to the well-known slow and fast SAs for fiber lasers, recently, germanium (Ge) was also considered as another promising candidate to serve as a fast SA due to its ultrafast recovery time (sub-picosecond degree) and nonlinear saturable absorption [ 42 , 43 , ...…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature PECVD Growth of Germanium for Mode-Locking of Er-Doped Fiber Laser

et al. 2022

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A low-temperature plasma-enhanced chemical vapor deposition grown germanium (Ge) thin-film is employed as a nonlinear saturable absorber (SA). This Ge SA can passively mode-lock the erbium-doped fiber laser (EDFL) for soliton generation at a central wavelength of 1600 nm. The lift-off and transfer of the Ge film synthesized upon the SiO2/Si substrate are performed by buffered oxide etching and direct imprinting. The Ge film with a thickness of 200 nm exhibits its Raman peak at 297 cm−1, which both the nanocrystalline and polycrystalline Ge phases contribute to. In addition, the Ge thin-film is somewhat oxidized but still provides two primary crystal phases at the (111) and (311) orientations with corresponding diffraction ring radii of 0.317 and 0.173 nm, respectively. The nanocrystalline structure at (111) orientation with a corresponding d-spacing of 0.319 nm is also observed. The linear and nonlinear transmittances of the Ge thin-film are measured to show its self-amplitude modulation coefficient of 0.016. This is better than nano-scale charcoal and carbon-black SA particles for initiating the mode-locking at the first stage. After the Ge-based saturable absorber into the L-band EDFL system without using any polarized components, the narrowest pulsewidth and broadest linewidth of the soliton pulse are determined as 654.4 fs and 4.2 nm, respectively, with a corresponding time–bandwidth product of 0.32 under high pumping conditions.

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“…Compared with the actively Q-switched and mode-locked lasers, which frequently depend on an acousto-optic modulator (AOM) [10] or an electro-optic modulator (EOM) [11] for pulsed operation, the passive ones that use low-dimensional nanomaterials as saturable absorbers (SAs) possess the merits of cost effectiveness, low optical loss, simplicity, and ease of integration into a laser system [12][13][14][15]. As deeply studied SAs, low-dimensional nanomaterials such as graphene [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], topological insulators (TIs) [32][33][34][35][36][37][38][39][40], MXenes [41][42][43][44][45][46], transition-metal dichalcogenides (TMDs) [47][48][49][50][51][52][53][54][55]…”

Section: Introductionmentioning

confidence: 99%

Visible-wavelength pulsed lasers with low-dimensional saturable absorbers

et al. 2020

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Abstract The recent renaissance in pulsed lasers operating in the visible spectral region has been driven by their significant applications in a wide range of fields such as display technology, medicine, microscopy, material processing, and scientific research. Low-dimensional nanomaterials as saturable absorbers are exploited to create strong nonlinear saturable absorption for pulse generation at visible wavelengths due to their absorption peaks located in visible spectral region. Here we provide a detailed overview of visible-wavelength pulsed lasers based on low-dimensional nanomaterials, covering the optical properties and various integration strategies of these nanomaterials saturable absorbers, and their performance from solid-state as well as fiber pulsed lasers in the visible spectral range. This emerging application domain will undoubtedly lead to the rapid development of visible pulsed lasers.

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MoS₂ nano-flake doped polyvinyl alcohol enabling polarized soliton mode-locking of a fiber laser

Abstract: Hybrid mode-locking of non-polarized Er-doped fiber laser with nonlinear saturable absorption of MoS2 nano-flake doped ultrathin polyvinyl alcohol film is demonstrated to obtain 330-fs pulsewidth.

Cited by 19 publications

References 56 publications

Incorporating MoS₂ saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers

Incorporating MoS₂ saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers

Low-Temperature PECVD Growth of Germanium for Mode-Locking of Er-Doped Fiber Laser

Visible-wavelength pulsed lasers with low-dimensional saturable absorbers

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MoS2 nano-flake doped polyvinyl alcohol enabling polarized soliton mode-locking of a fiber laser

Abstract: Hybrid mode-locking of non-polarized Er-doped fiber laser with nonlinear saturable absorption of MoS2 nano-flake doped ultrathin polyvinyl alcohol film is demonstrated to obtain 330-fs pulsewidth.

Cited by 19 publications

References 56 publications

Incorporating MoS2 saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers

Incorporating MoS2 saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers

Low-Temperature PECVD Growth of Germanium for Mode-Locking of Er-Doped Fiber Laser

Visible-wavelength pulsed lasers with low-dimensional saturable absorbers

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MoS₂ nano-flake doped polyvinyl alcohol enabling polarized soliton mode-locking of a fiber laser

Incorporating MoS₂ saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers

Incorporating MoS₂ saturable absorption with nonlinear polarization rotation for stabilized mode-locking fibre lasers