Passively Mode-Locked Fiber Lasers Based on Nonlinearity at 2-<i>μ</i>m Band

Ma, Wanzhuo; Jia, Qiang; Su, Qingchao; Liu, Peng; Zhang, Peng

doi:10.1109/jstqe.2017.2783047

Cited by 31 publications

(19 citation statements)

References 75 publications

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“…Therefore, it was possible to generate many Kelly sidebands when the phase-matching conditions were well satisfied in the laser cavity. Note that there are several reports on obtaining many Kelly peaks in passively mode-locked Tm-doped fiber lasers 51 – 53 . The temporal shape and spectrum of the output pulses exhibited little change when the pump power was changed from 224 to 297 mW.…”

Section: Resultsmentioning

confidence: 99%

Nonlinear optical property measurements of rhenium diselenide used for ultrafast fiber laser mode-locking at 1.9 μm

Lee

Kwon

Kim

et al. 2021

Sci Rep

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An experimental investigation into the nonlinear optical properties of rhenium diselenide (ReSe2) was conducted at a wavelength of 1.9 μm using the open-aperture and closed-aperture Z-scan techniques for the nonlinear optical coefficient (β) and nonlinear refractive index (n2) of ReSe2, respectively. β and n2 measured at 1.9 μm were ~ − 11.3 × 103 cm/GW and ~ − 6.2 × 10–2 cm2/GW, respectively, which to the best of our knowledge, are the first reported measurements for ReSe2 in the 1.9-μm spectral region. The electronic band structures of both ReSe2 and its defective structures were also calculated via the Perdew–Becke–Erzenhof functional to better understand their absorption properties. A saturable absorber (SA) was subsequently fabricated to demonstrate the usefulness of ReSe2 for implementing a practical nonlinear optical device at 1.9 μm. The 1.9-μm SA exhibited a modulation depth of ~ 8% and saturation intensity of ~ 11.4 MW/cm2. The successful use of the ReSe2-based SA for mode-locking of a thulium–holmium (Tm–Ho) co-doped fiber ring cavity was achieved with output pulses of ~ 840 fs at 1927 nm. We believe that the mode-locking was achieved through a hybrid mechanism of saturable absorption and nonlinear polarization rotation.

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Section: Resultsmentioning

confidence: 99%

Nonlinear optical property measurements of rhenium diselenide used for ultrafast fiber laser mode-locking at 1.9 μm

Lee

Kwon

Kim

et al. 2021

Sci Rep

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show abstract

“…However, an NLP bunch can have relatively long ns duration and the square pulse profile is similar to optical pulses generated at dissipative soliton resonance (DSR). These two regimes have recently been presented in the same thulium/holmium co-doped fiber laser based on NALM and the difference between DSR and NLP generations was discussed [27].…”

Section: Introductionmentioning

confidence: 86%

Noise-Like Pulse Generation Using Polarization Maintaining Mode-Locked Thulium-Doped Fiber Laser With Nonlinear Amplifying Loop Mirror

Michalska

Świderski

2019

IEEE Photonics J.

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We investigate noise-like pulse (NLP) generation in a mode-locked thuliumdoped fiber laser with nonlinear amplifying loop mirror (NALM) and different net anomalous dispersions. The all-polarization maintaining (PM) fiber oscillator generates pulse trains with a frequency adjustable in the range of 4.06-20.4 MHz by utilizing different lengths of PM passive fiber in the NALM loop. An NLP with a coherence spike width of 232 fs was generated at 1993.6 nm with a 3-dB spectral width of 32.6 nm when the net cavity dispersion was −0.711 ps 2 .

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“…Square‐wave noise‐like pulse (NLP), composed of many sub‐stochastic short pulses, has potential applications in micromachining, supercontinuum generation, and optical coherence tomography, due to characteristics of low coherence and high energy. [ 1–3 ] In recent years, square‐wave NLP has been generated both in normal and anomalous regimes, [ 4–9 ] using traditional mode locking techniques, such as nonlinear polarization rotation (NPR), [ 4,5 ] nonlinear optical loop mirror, [ 6 ] nonlinear amplifying loop mirror, [ 5,7,8 ] as well as novel methods, such as 2D materials due to the rapid development of this new field. [ 9–11 ] Most of these works used rare earth doped fibers to provide optical gain limited in particular wavelength range, while Raman fiber lasers can exactly make up for this weakness.…”

Section: Introductionmentioning

confidence: 99%

Raman Gain Square‐Wave Noise‐Like Pulse Laser Pumped by a Random Fiber Laser

2021

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Mode locking of a long‐cavity Raman fiber laser pumped by a low‐noise random fiber laser (RFL) is demonstrated experimentally, where tunable square‐wave noise‐like pulse (NLP) is generated through nonlinear polarization rotation technology. Pulse duration can be tuned from 26 to 134 ns by controlling the polarization state or pump power at a repetition rate of 93 kHz. A signal‐to‐noise ratio of 64 dB is obtained due to the low‐noise characteristic of RFL. In addition, up to 24th high‐order harmonic mode‐locked square‐wave NLP is observed, which has not been reported in mode‐locked Raman fiber lasers with large normal dispersion. This approach not only provides a good temporal stable pump source for mode locking of Raman fiber lasers, but also enriches the methods of laser pulse generation and regulation.

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Passively Mode-Locked Fiber Lasers Based on Nonlinearity at 2-μm Band

Cited by 31 publications

References 75 publications

Nonlinear optical property measurements of rhenium diselenide used for ultrafast fiber laser mode-locking at 1.9 μm

Nonlinear optical property measurements of rhenium diselenide used for ultrafast fiber laser mode-locking at 1.9 μm

Noise-Like Pulse Generation Using Polarization Maintaining Mode-Locked Thulium-Doped Fiber Laser With Nonlinear Amplifying Loop Mirror

Raman Gain Square‐Wave Noise‐Like Pulse Laser Pumped by a Random Fiber Laser

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