Generation of Multiwavelength Noise-Like Square-Pulses in a Fiber Laser

Liu, Hao; Zheng, Xiaoting; Zhao, Nian; Ning, Qiu-Yi; Li, Meng; Luo, Zhi‐Chao; Luo, Ai‐Ping; Xu, Wen‐Cheng

doi:10.1109/lpt.2014.2344505

Cited by 28 publications

(14 citation statements)

References 25 publications

(22 reference statements)

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“…7(d), shows a double structure with a short peak riding long pedestal, which is typical of NLPs. The characteristics of the square pulses reported in this work are similar to those reported before by other authors [29,30]. Finally, Fig.…”

Section: Soliton Regime (Sr)supporting

confidence: 91%

Long cavity ring fiber mode-locked laser with decreased net value of nonlinear polarization rotation

Rodríguez-Morales¹,

Armas-Rivera²,

Ibarra-Escamilla³

et al. 2019

Opt. Express

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We investigate a new configuration of a mode-locked fiber laser by using a nonlinear polarization rotation-based design to generate soliton pulses with low repetition rate. Unlike with previously reported configurations, we introduce a Faraday mirror after the first half of the cavity length to counteract the nonlinear polarization rotation effects. The total cavity length is 437 m including a 400-m long twisted SMF-28 fiber. The fiber was twisted to cancel the linear birefringence and to ensure that the polarization ellipticity is not altered as the pulse travels along the fiber. The strict control of polarization yields a stable relation between the polarization state of the pulses propagating in the cavity and the regimes of generation. Depending on the polarization state we observed three different emission regimes, the single soliton regime (SR), conventional noise-like pulses (NLP) and noise-like square-waveform pulse (NLSWP). In the SR, a 467.2 kHz train of solitons was obtained with pulse duration of 2.9 ps at 1558.7 nm. IntroductionUltrafast lasers have attracted significant interest due to their potential for applications like surgery [1], high-precision micromachining [2] and multiphoton microscopy (MPM) [3]. In the last case the fiber soliton sources can be especially useful because of their capacity of generating ultrashort pulses in the wavelength range from 1530 nm to 2000 nm using Er, Tm, Ho doped fibers and the effect of soliton self-frequency shift [4]. A high-repetition train of ultrashort pulses causes the effect of thermal accumulation [5,6] which can be beneficial in some cases, however it is undesirable for applications such as MPM. The repetition rate can be reduced by using pulse pickers such as Pockels cells or acousto-optic modulators, however this method is energetically inefficient and increases the complexity of the setup. Because the repetition rate of a mode-locked laser is inversely proportional to its resonator length, the repetition rate can be reduced simply by lengthening the cavity. In contrast to solid-state lasers, which require critical alignment, fiber lasers are more prone to achieve lower repetition rates with the convenience and simplicity of elongating a fiber cavity.The long cavity lasers were studied mainly with the purpose to increase the pulse energy in the configurations with net-normal dispersion. For example, Kobtsev et al. [7]

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Section: Soliton Regime (Sr)supporting

confidence: 91%

Long cavity ring fiber mode-locked laser with decreased net value of nonlinear polarization rotation

Rodríguez-Morales¹,

Armas-Rivera²,

Ibarra-Escamilla³

et al. 2019

Opt. Express

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show abstract

“…However, the generation of DSR pulse requires rigorous cavity parameter selections, which makes it inconvenient to be achieved in fiber lasers. Later then, it was found that the NL pulse packet also could possess a rectangular envelope and exhibit similar pulse dynamics of the DSR pulse [17]. Nevertheless, it should be noted that the NL wave packet is not a single pulse but consists of a bunch of short pulses with stochastic duration and peak power.…”

Section: Introductionmentioning

confidence: 99%

Flexible generation of coherent rectangular pulse from an ultrafast fiber laser based on dispersive Fourier transformation technique

Wang¹,

Liu²,

Huang³

et al. 2015

Opt. Express

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We propose a new solution to flexibly generate the coherent rectangular pulse from an ultrafast fiber laser based on the dispersive Fourier transformation (DFT) technique. The rectangular dissipative soliton (DS) spectra emitted from a net-normal dispersion mode-locked fiber laser is mapped into a time-domain coherent rectangular waveform through the DFT technique. The rectangular pulse can be broadened flexibly with the adjustments of the pump power. The coherence and shot-to-shot fluctuations of the achieved rectangular pulses are further verified by the Mach-Zehnder interference experiment and the recorded single-shot pulse train, respectively. The results demonstrate that the combination of DS mode-locked laser and DFT technique might be indeed an effective and flexible way to achieve highly coherent rectangular pulses.

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“…Therefore, passively mode-locked fiber lasers become an ideal test-bed for the investigation on the formation and characteristics of the multi-wavelength soliton pulses. So far, various multi-wavelength mode-locking operation, such as tunable and switchable multi-wavelength dissipative solitons [12][13][14], dual-wavelength conventional solitons [2], multi-wavelength conventional solitons [15,16], multi-wavelength noise-like square-pulses [17], dual-wavelength harmonic mode locking pulses [18], and dual-wavelength bound-state solitons [5], have been observed in fiber lasers. However there are many interesting soliton interactions [19,20] have not been reported in multi-wavelength passively mode-locked fiber lasers.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Bound-Soliton States in a Dual-Wavelength Mode-Locked Fiber Laser Based on Bi2Se 3

Song

Tian

et al. 2017

IEEE Photonics J.

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Wavelength switchable and dual-wavelength soliton operations are demonstrated in an erbium-doped fiber laser with three pieces of TI Bi 2 Se 3 polyvinyl alcohol (Bi 2 Se 3 -PVA) film. Wavelength switchable operation from 1532 to 1557 nm could be achieved just by adjusting the pump power. With the appropriate settings of PC and pump power, a novel dual-wavelength soliton operation was observed. The dual-wavelength pulses operate at different mode-locked states. One is the single pulse mode-locking operation at 1532 nm, and the other one is the bound-soliton states at 1557 nm. However, the dual-wavelength soliton operation cannot be stable for a long time. The numerical results demonstrate that the separations of bound pulses have small variation and the different phase of bound pulses appear jumping change of . Index Terms-Fiber lasers, Mode-locked lasers, Bound solitons, Dual-wavelength solitons, Topological insulator.

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Generation of Multiwavelength Noise-Like Square-Pulses in a Fiber Laser

Cited by 28 publications

References 25 publications

Long cavity ring fiber mode-locked laser with decreased net value of nonlinear polarization rotation

Long cavity ring fiber mode-locked laser with decreased net value of nonlinear polarization rotation

Flexible generation of coherent rectangular pulse from an ultrafast fiber laser based on dispersive Fourier transformation technique

Analysis of Bound-Soliton States in a Dual-Wavelength Mode-Locked Fiber Laser Based on Bi2Se 3

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