A comparative study of an Yb-doped fiber gain-managed nonlinear amplifier seeded by femtosecond fiber lasers

Tomaszewska-Rolla, Dorota; Lindberg, Robert; Pašiškevičius, Valdas; Laurell, Fredrik; Soboń, Grzegorz

doi:10.1038/s41598-021-04420-3

Cited by 16 publications

(3 citation statements)

References 24 publications

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“…Broadband seed lasers have undergone dramatic development [12,13], although their amplification is restricted by the gain-narrowing effect. Some methods have been put forward to solve this problem, such as gain-managed nonlinear broadening [14,15]. For the stretcher, several kinds of wavelength-dispersive components have been employed, such as passive fiber, transmissive gratings, dispersive mirrors, and chirped bragger grating [3,11,16,17].…”

Section: Introductionmentioning

confidence: 99%

Wavelength-Tunable Chirped Pulse Amplification System (1720 nm–1800 nm) Based on Thulium-Doped Fiber

Liu,

Gumenyuk

2024

Photonics

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Chirped pulse amplification (CPA) has been a commonly used methodology to obtain powerful ultrashort laser pulses ever since its first demonstration. However, wavelength-tunable CPA systems are much less common. Wavelength-tunable ultrashort and intense laser pulses are desirable in various fields such as nonlinear spectroscopy and optical parametric amplification. In this work, we report a 1720 nm–1800 nm tunable CPA system based on Tm-doped fiber. The tunable CPA system contains a seed laser, a pulse stretcher, two cascaded amplifiers and a pulse compressor. The dispersion-managed seed laser cavity emits wavelength-tunable laser pulses with pulse durations of several ps and spectral widths from 25 nm to 34 nm. After being stretched temporally to tens of ps, the laser pulses are then amplified in two-stage amplifiers and compressed in a Treacy-type compressor. At 1720 nm, the maximum average power of 126 mW is obtained with a pulse duration of 507 fs; at 1800 nm, the maximum average power of 264 mW is obtained with a pulse duration of 294 fs. The pulse repetition rates are around 22.7 MHz. We perform an analysis of the system design based on numerical simulations and go on to suggest further steps for improvement. To the best of our knowledge, this is the first demonstration of a tunable CPA system beyond 1.1 μm. Considering the specific wavelength range, this wavelength-tunable CPA system is highly desirable for biomedical imaging, sensing, and parametric amplifiers.

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Section: Introductionmentioning

confidence: 99%

Wavelength-Tunable Chirped Pulse Amplification System (1720 nm–1800 nm) Based on Thulium-Doped Fiber

Liu,

Gumenyuk

2024

Photonics

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“…Due to its high surface-area-tovolume ratio, the fiber laser system overcomes heat dissipation problems, provides higher average power, and realizes stable and alignment-free operation. There are many research efforts working on the fiber amplification theoretical model [24][25][26][27][28][29][30][31][32][33]. Early studies focused on the steady-state of the fiber system [24][25][26][27][28], and recent studies show more complicated works were centered on the behavior of the pulse amplification by combining the laser rate and Ginzburg-Landau equations [29][30][31][32][33], which took nonlinearity and dispersion into consideration.…”

Section: Introductionmentioning

confidence: 99%

“…There are many research efforts working on the fiber amplification theoretical model [24][25][26][27][28][29][30][31][32][33]. Early studies focused on the steady-state of the fiber system [24][25][26][27][28], and recent studies show more complicated works were centered on the behavior of the pulse amplification by combining the laser rate and Ginzburg-Landau equations [29][30][31][32][33], which took nonlinearity and dispersion into consideration. However, there is not too much theoretical research working on the dual-wavelength fiber amplifier due to the complexity of gain competition during amplification and amplified spontaneous emission (ASE) between the two wavelength regions.…”

Section: Introductionmentioning

confidence: 99%

Modeling of a dual-wavelength fiber amplification system for further mid-infrared generation

Su¹,

Xu²,

Zheng³

et al. 2022

J. Opt.

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A dual-wavelength, two-stage Yb-doped fiber amplification system is theoretically studied for further mid-infrared generation. In this amplification system, two sections of double-clad single-mode Yb-doped fiber are used as the gain medium, and the spectrum in the wavelength range 1000-1120 nm is simulated. For the simulation of the preamplification stage, a 975 nm diode laser with a power of 6.5 W is used to pump the preamplification stage by the counter-pumping scheme, and the measured dual-wavelength seed spectra are used. For the main amplification stage simulation, the gain fiber length is 1.7 m, and a 975 nm, 7.5 W diode laser is used as the pump source. Results show that for the two-stage amplification process, the maximum value of the dual-wavelength power product can be obtained in the main amplification stage with a 1.7 m gain fiber when the 2.2 m Yb-doped fiber is selected for the preamplification stage with the counter-pumping scheme. Under the above condition, the total average power of the seed signal after amplification is calculated to be 3.2 W, with negligible ASE noise. In addition, we have compared the theoretically calculated spectral results with the experimental results of the actual main amplification stage.

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1 MW Peak‐Power Mamyshev Oscillator Started by a Passively Q‐Switched Microchip Laser

Gotti,

Carrà,

Pizzurro

et al. 2024

Advanced Photonics Research

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Ultrafast fiber lasers (UFLs) have become an attractive alternative to solid‐state lasers (SSL) due to their excellent beam quality, compactness, environmental stability, and easy thermal management. In the last decade, a significant research effort is spent to identify UFL architectures providing pulse energy, duration, and peak power comparable to those of complex and expensive, Ti:sapphire laser systems and semiconductor saturable absorber mirrors mode‐locked, Yb‐doped SSL. Lately, Mamyshev oscillators (MOs), relying on offset spectral filtering combined with nonlinear spectral broadening by self‐phase modulation, emerge as a promising solution and are rapidly becoming the state of the art for high energy/peak power UFLs based on large‐mode‐area (LMA) fibers. The focus of this work is the first demonstration of starting of the mode‐locking regime in an LMA MO with an affordable passively Q‐switched microchip laser. This solution was previously demonstrated only in low‐power MO based on single‐mode fibers, which are intrinsically easier to seed, if compared to high‐gain LMA UFLs, because of the lower amplified spontaneous emission noise floor. This starting technique in an easy‐to‐implement ring LMA MO at 1 μm is tested. The oscillator provides ≈50 nJ pulses at 12 MHz repetition rate with a minimum pulse duration of ≈50 fs after compression, resulting in MW peak power.

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A comparative study of an Yb-doped fiber gain-managed nonlinear amplifier seeded by femtosecond fiber lasers

Cited by 16 publications

References 24 publications

Wavelength-Tunable Chirped Pulse Amplification System (1720 nm–1800 nm) Based on Thulium-Doped Fiber

Wavelength-Tunable Chirped Pulse Amplification System (1720 nm–1800 nm) Based on Thulium-Doped Fiber

Modeling of a dual-wavelength fiber amplification system for further mid-infrared generation

1 MW Peak‐Power Mamyshev Oscillator Started by a Passively Q‐Switched Microchip Laser

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