Route to Larger Pulse Energy in Ultrafast Fiber Lasers

Zhao, Lei; Li, Daojing; Li, Lei; Wang, Xuan; Geng, Ying; Shen, Deyuan; Su, Lei

doi:10.1109/jstqe.2017.2771739

Cited by 20 publications

(10 citation statements)

References 70 publications

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“…Besides the DSR pulse exhibiting square wave envelope, some other related pulse envelopes have also been observed, such as that with a tilt-top [38,39]. For some other particular pulses, although they, strictly speaking, could not be identified as in the DSR regime, there were some similarities between them and the DSR pulse in envelop, like the chair-like pulses [40], step-like pulses [41], etc.…”

Section: Introductionmentioning

confidence: 99%

Tunable and switchable harmonic h-shaped pulse generation in a 303 km ultralong mode-locked thulium-doped fiber laser

Zhao

et al. 2019

Photon. Res.

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We experimentally demonstrated a type of tunable and switchable harmonic h-shaped pulse generation in a thulium-doped fiber (TDF) laser passively mode-locked by using an ultra-long nonlinear optical loop mirror (NOLM). The total cavity length was ~3.03 km, the longest ever built for a TDF laser to our best knowledge, which resulted in an ultra-large anomalous dispersion over -200 ps 2 around the emission wavelength. The produced hshaped pulse could operate either in a fundamental or in a high-order harmonic mode-locking (HML) state depending on pump power and intra-cavity polarization state (PS). The pulse duration, no matter of the operation state, was tunable with pump power. However, pulse breaking and self-organizing occurred, resulting in high order HML, when the pump power increased above a threshold. At a fixed pump power, the order of HML was switchable from one to another by manipulating the PS. Switching from 8 th up to 48 th order of HML was achieved with a fixed pump power of ~4.15 W. Our results revealed the detailed evolution and switching characteristics of the HML and individual pulse envelope with respect to both the pump power and PS. We have also discussed in detail on the mechanisms of both the h-shaped pulse generation and the switching of its HML. This contribution would be helpful for further in-depth study on the underlain dynamics of long duration, particular-envelope pulses with ultra-large anomalous dispersion and ultra-long roundtrip time.

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Section: Introductionmentioning

confidence: 99%

Tunable and switchable harmonic h-shaped pulse generation in a 303 km ultralong mode-locked thulium-doped fiber laser

Zhao

et al. 2019

Photon. Res.

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“…The simulation results from Fig. 1c, d show that the 635 nm mode-locked pulses have a constant amplitude, a linearly broadening pulse duration and a narrow spectral peak profile with steep edges, which are the typical features of the DSR regime 26,32 .…”

Section: Numerical Simulationsmentioning

confidence: 87%

Towards visible-wavelength passively mode-locked lasers in all-fibre format

et al. 2020

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Mode-locked fibre lasers (MLFLs) are fundamental building blocks of many photonic systems used in industrial, scientific and biomedical applications. To date, 1-2 μm MLFLs have been well developed; however, passively modelocked fibre lasers in the visible region (380-760 nm) have never been reported. Here, we address this challenge by demonstrating an all-fibre visible-wavelength passively mode-locked picosecond laser at 635 nm. The 635 nm mode-locked laser with an all-fibre figure-eight cavity uses a Pr/Yb codoped ZBLAN fibre as the visible gain medium and a nonlinear amplifying loop mirror as the mode-locking element. First, we theoretically predict and analyse the formation and evolution of 635 nm mode-locked pulses in the dissipative soliton resonance (DSR) regime by solving the Ginzburg-Landau equation. Then, we experimentally demonstrate the stable generation of 635 nm DSR mode-locked pulses with a pulse duration as short as~96 ps, a radio-frequency signal-to-noise ratio of 67 dB and a narrow spectral bandwidth of <0.1 nm. The experimental results are in excellent agreement with our numerical simulations. In addition, we also observe 635 nm noise-like pulse operation with a wide (>1 nm) and modulated optical spectrum. This work represents an important step towards miniaturized ultrafast fibre lasers in the visible spectral region.

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“…These waves can preserve their overall shapes during propagation by adjusting their amplitudes and widths to accommodate gradual longitudinal variations in system parameters [1][2][3]. Much attention in the optics literature has been paid to similaritons in fiber lasers [3][4][5][6][7] and amplifiers [8,9], dispersion-decreasing fibers [10][11][12], and tapered inhomogeneous nonlinear waveguides [13][14][15][16][17][18]. Generic theoretical models governing the dynamics of similaritons tend to be based on the well-known nonlinear Schrödinger (NLS) equation [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…arbitrary real constants. The two-similariton solution (8) is, in essence, a nonlinear superposition of two one-similariton solutions(6). It can be seen from Eqs.…”

mentioning

confidence: 99%

“…The propagation of bright similariton(6) and dark similariton(14) with the parameters (a) and (c) 11 0The other parameters are specified in the text.The numerical evolution of the similaritons under amplitude fluctuation [(e) and (g)] and perturbation of white noise [(f) and (h)], where the parameters are the same as in (a) and (c), correspondingly. The insets are the comparison of numerical [blue circle (dot) lines] and exact profiles (red solid lines) at z 40  .…”

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confidence: 99%

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Ultrashort nonautonomous similariton solutions and the cascade tunneling of interacting similaritons

Yang

Gao

Jia

et al. 2020

Optics Communications

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Similarity transformation and Hirota bilinearization are deployed to derive exact bright and dark ultrashort one-and two-similariton solutions of a nonautonomous cubic-quintic nonlinear Schrödinger equation. Such wave packets may emerge when group-velocity dispersion and cubic-quintic self-phase modulations are balanced by Raman self-frequency shift in the presence of an external harmonic trap and linear gain or loss. The solutions presented here can be used to investigate the compression, amplification and interaction phenomena associated with bright and dark similaritons in inhomogeneous fiber systems. Furthermore, the dynamics of the characteristic parameters of the similaritons are studied analytically, and similariton stability in a distributed system is tested through extensive computations. As an example application, the tunneling behavior of bright and dark similaritons through cascade dispersion barriers and dispersion wells on an exponential background is investigated, and some interesting novel features are uncovered which are expected to facilitate the control of bright and dark ultrashort similariton in experimental scenarios. Keywords two-similariton, interaction, Raman effect, harmonic potential, cascade tunneling () () () () () () () 0 zz z z w z z w z z p z z w z

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Route to Larger Pulse Energy in Ultrafast Fiber Lasers

Cited by 20 publications

References 70 publications

Tunable and switchable harmonic h-shaped pulse generation in a 303 km ultralong mode-locked thulium-doped fiber laser

Tunable and switchable harmonic h-shaped pulse generation in a 303 km ultralong mode-locked thulium-doped fiber laser

Towards visible-wavelength passively mode-locked lasers in all-fibre format

Ultrashort nonautonomous similariton solutions and the cascade tunneling of interacting similaritons

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