Power Scaling of Narrow-Linewidth Fiber Amplifier Seeded by Yb-Doped Random Fiber Laser

Li, Tenglong; Li, Yang; Ke, Weiwei; Zha, Congwen; Peng, Wanjing; Sun, Yunxu; Ma, Yanxing

doi:10.1109/jstqe.2018.2814791

Cited by 19 publications

(8 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pump threshold of the RFL seed is about 1 W; with the scaling of the pump power, the output power grows rapidly to ~600 mW. Then a one-stage amplification chain, similar to the structure of the pre-amplifier in [16,24], is utilized to scale the RFL seed power to ~27 W.…”

Section: Methodsmentioning

confidence: 99%

“…In the amplifier, employing large mode area (LMA) fibers is a simple and practical way. Based on commercial off-the-shelf (COTS) 20/400 µm fibers, several amplifiers with linewidths of tens of gigahertz at a 2 kW power level have been demonstrated [13][14][15][16]. Unfortunately, such systems have limited room for power scaling owing to severe SBS or SRS effects, so it is necessary to utilize fibers with a larger core diameter of 25 µm or 30 µm to lower the power density.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

3.5 kW bidirectionally pumped narrow-linewidth fiber amplifier seeded by white-noise-source phase-modulated laser

Zha

Sun

et al. 2018

Laser Phys.

Self Cite

View full text Add to dashboard Cite

We demonstrate an all-fiber narrow-linewidth amplifier employing a bidirectional pump scheme and cascaded white-noise-source phase-modulated seed laser. The stimulated Raman scattering effect in the amplifier is investigated by substituting different types of seed lasers. The influence of pump distributions and seed injection power on mode instability (MI) in the amplifier is also experimentally investigated. As a result, a 3 dB linewidth of 0.175 nm and a beam quality of M 2 ≈ 1.5 are obtained at the output of ~3 kW, without observation of MI and stimulated Brillouin scattering effect. With the further increase of pump power, MI occurs as the output exceeds 3.17 kW, along with beam quality degradation. Optical efficiency decreases to 71.5% at the ultimate output of 3.5 kW. Therefore MI becomes the main limitation to further power scaling.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3.5 kW bidirectionally pumped narrow-linewidth fiber amplifier seeded by white-noise-source phase-modulated laser

Zha

Sun

et al. 2018

Laser Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Another method is to employ the MOPA structure, which is straightforward and effective. Through this way, the output power of RFL has been gradually scaled to more than 2 kW through the LD pumping scheme [60]. However, the beam quality would degrade owing to the onset of the TMI effect.…”

Section: Random Fiber Lasermentioning

confidence: 99%

New avenues for high-power high-brightness tandem-pumped fiber lasers

Xiao

et al. 2023

Advanced Fiber Laser Conference (AFL2022)

View full text Add to dashboard Cite

The tandem pumping technique has been proven effective in power scaling of fiber lasers, which enabled the most powerful high-brightness fiber lasers to date. However, further performance improvement of tandem-pumped fiber lasers is challenged by the contradiction between nonlinearity suppression and good beam quality maintaining. To address these challenges, researchers from worldwide devoted to expediting the development of high-power tandem-pumped fiber lasers, and a series of new results and new applications emerged in recent years. This paper will highlight the recent advances in the enabling techniques of high-brightness tandem-pumped fiber lasers and the new applications of tandem pumping since the first review paper on this topic in 2017 [J. Opt. Soc. Am. B 34(3): A29-A36 (2017)]. A brief outlook on the further development of tandem pumping technique is also given.

show abstract

“…Narrow linewidth fiber lasers have important applications in the fields of nonlinear frequency conversion [1] and power combining fields (spectral beam combing [2,3], coherent beam combing [4,5], etc). High-power narrow-linewidth fiber lasers generally use the seed power amplification structure, the seed sources mainly include single-frequency seed [6], single-frequency phase modulation seeds (white noise [7][8][9], pseudo-random binary sequence [10][11][12], sinusoidal [13], etc) or other seeds (fiber oscillator (FO) [14][15][16], superfluorescence [17], random laser [18], etc). The power scaling of a narrow linewidth fiber amplifier is mainly limited by the nonlinear effects and the mode instability (MI) effects.…”

Section: Introductionmentioning

confidence: 99%

Influence of injected signal polarization on SBS, SRS, spectral broadening, and self-pulsing properties in high-power fiber amplifier

Wang¹,

Peng²,

Feng³

et al. 2022

Laser Phys. Lett.

Self Cite

View full text Add to dashboard Cite

In this paper, we construct a narrow-linewidth amplifier based on polarization-maintaining (PM) fiber, which can be injected by a fiber oscillator seed or white noise signal phase-modulated seed. The stimulated Brillouin scattering (SBS), SRS, spectral broadening, self-pulsing properties of the fiber amplifier when its’ injected signal is 0° or 45° relative to the slow axes of the PM fiber are studied. It is indicated that when the injected signal is launched at 45° relative to the slow axes, the nonlinear effects are significantly suppressed compared with the case of the injected signal is launched parallel to the slow axis. The spectral broadening rate is reduced from 0.14 pm W−1 to 0.0747 pm W−1, the ratio of Raman to laser peak intensity is increased from 20 dB to 30 dB, the SBS threshold is increased by >24%, and the self-pulsing threshold is increased by 28.7%. It is worth noting that the nonlinear properties corresponding to the injected polarization state in our experiment are quite different from some earlier works.

show abstract

Power Scaling of Narrow-Linewidth Fiber Amplifier Seeded by Yb-Doped Random Fiber Laser

Cited by 19 publications

References 36 publications

3.5 kW bidirectionally pumped narrow-linewidth fiber amplifier seeded by white-noise-source phase-modulated laser

3.5 kW bidirectionally pumped narrow-linewidth fiber amplifier seeded by white-noise-source phase-modulated laser

New avenues for high-power high-brightness tandem-pumped fiber lasers

Influence of injected signal polarization on SBS, SRS, spectral broadening, and self-pulsing properties in high-power fiber amplifier

Contact Info

Product

Resources

About