High-power ns-pulse fiber laser sources for remote sensors

Teodoro, Fabio Di; Belden, Paul M.; Ionov, Pavel; Werner, Nicolette

doi:10.1016/j.yofte.2014.08.007

Cited by 10 publications

(4 citation statements)

References 45 publications

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“…Our experimental results, performed with both continuous-wave (CW) excitation at a wavelength of 1064 nm and 200-ns pulses at 1550 nm, confirm that our method is effective, robust, and generally applicable to different settings. It will enable power scaling of light delivery and amplification for various applications, e.g., directed energy and long-range remote sensing [39,40,41,32]. , producing a single spot in the far-field intensity pattern at multimode fiber output (a3).…”

Section: Introductionmentioning

confidence: 99%

Suppressing Stimulated Brillouin Scattering by Selective Mode Excitation in Multimode Fibers

Chen¹,

Wisal²,

Ahmadi³

et al. 2022

Conference on Lasers and Electro-Optics

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Section: Introductionmentioning

confidence: 99%

Suppressing Stimulated Brillouin Scattering by Selective Mode Excitation in Multimode Fibers

Chen¹,

Wisal²,

Ahmadi³

et al. 2022

Conference on Lasers and Electro-Optics

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“…Our experimental results, performed with both continuous-wave (CW) excitation at wavelength λ = 1064 nm and 186-ns pulses at 1550 nm, confirm that our method is effective, robust, and generally applicable to different settings. It will enable power scaling of light delivery and amplification for various applications, e.g., directed energy and longrange remote sensing 37,[44][45][46] .…”

mentioning

confidence: 99%

Mitigating stimulated Brillouin scattering in multimode fibers with focused output via wavefront shaping

Chen,

Nguyen,

Wisal

et al. 2023

Nat Commun

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The key challenge for high-power delivery through optical fibers is overcoming nonlinear optical effects. To keep a smooth output beam, most techniques for mitigating optical nonlinearities are restricted to single-mode fibers. Moving out of the single-mode paradigm, we show experimentally that wavefront-shaping of coherent input light to a highly multimode fiber can increase the power threshold for stimulated Brillouin scattering (SBS) by an order of magnitude, whilst simultaneously controlling the output beam profile. The SBS suppression results from an effective broadening of the Brillouin spectrum under multimode excitation, without broadening of transmitted light. Strongest suppression is achieved with selective mode excitation that gives the broadest Brillouin spectrum. Our method is efficient, robust, and applicable to continuous waves and pulses. This work points toward a promising route for mitigating detrimental nonlinear effects in optical fibers, enabling further power scaling of high-power fiber systems for applications to directed energy, remote sensing, and gravitational-wave detection.

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“…High-power nanosecond pulsed laser sources with a single frequency have many important applications, such as material processing, remote sensing, laser radar, nonlinear frequency generation, and coherent beam combination [1][2][3][4][5] . However, for lasers whose bandwidth is narrow compared to the Brillouin linewidth (∼50-100 MHz), also considered as a single frequency, the output amplifier power is clamped when electrostriction creates an acoustic wave in the fiber, leading to backward stimulated Brillouin scattering (SBS) of the signal power [6] .…”

mentioning

confidence: 99%

Stimulated Brillouin scattering threshold dependent on temporal characteristics in a kilowatt-peak-power, single-frequency nanosecond pulsed fiber amplifier

Zhao

Wang

et al. 2016

Chin. Opt. Lett.

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The stimulated Brillouin scattering (SBS) threshold affected by repetition rate and pulse duration in a singlefrequency nanosecond pulsed fiber amplifier is studied. The experimental results demonstrate that the SBS threshold can be improved either by reducing the repetition rate or by narrowing the pulse duration; however, the average power may be limited in some cases. Otherwise, two evaluation methods for the SBS threshold in the fiber amplifier are compared and discussed, aiming to obtain a more accurate description for the SBS threshold in our single-frequency amplifier system.

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High-power ns-pulse fiber laser sources for remote sensors

Cited by 10 publications

References 45 publications

Suppressing Stimulated Brillouin Scattering by Selective Mode Excitation in Multimode Fibers

Suppressing Stimulated Brillouin Scattering by Selective Mode Excitation in Multimode Fibers

Mitigating stimulated Brillouin scattering in multimode fibers with focused output via wavefront shaping

Stimulated Brillouin scattering threshold dependent on temporal characteristics in a kilowatt-peak-power, single-frequency nanosecond pulsed fiber amplifier

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