Raman Amplification in Multimode Fiber

Polley, A.; Ralph, Stephen E.

doi:10.1109/lpt.2006.890752

Cited by 30 publications

(12 citation statements)

References 10 publications

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“…First, because the effective modal area of each mode in the GIMF scales only as square root of the core area, the effective nonlinearity of some propagating modes is comparable with conventional single-mode fibers 9 . Second, a relatively high GeO 2 content in the core of the standard telecommunication GIMF used in our experiments results in a higher peak Raman gain coefficient compared with silica-core fibers 10 . The pump used in our experiment is a frequencydoubled, Q-switched, Nd:YLF laser operating at 523 nm wavelength, and its 8-ns duration pulses are coupled to the input tip of the fiber using a microscope objective.…”

mentioning

confidence: 89%

“…The most notable feature we want to stress is that a GIMF can be used as a device that not only shifts the pump wavelength toward the red side through SRS but also performs the beam cleanup owing to the fact that different-order Raman peaks generally propagate in different modes of the fiber. The main reason for the Raman beam cleanup is that the lower order modes generally have a larger Raman gain because of their greater overlap with the higher concentration of GeO 2 near the center of the GIMF core 10 . A detailed analysis of SRSinduced beam cleanup in graded-index multimode optical fibers can be found in Ref.…”

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confidence: 99%

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Stimulated Raman scattering cascade spanning the wavelength range of 523 to 1750 nm using a graded-index multimode optical fiber

Pourbeyram¹,

Agrawal²,

Mafi³

2013

Applied Physics Letters

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Stimulated Raman scattering cascade spanning the wavelength range of 523 to 1750 nm using a graded-index multimode optical fiber We report on the generation of a Raman cascade spanning the wavelength range of 523 to 1750 nm wavelength range, in a standard telecommunication graded-index multimode optical fiber. Despite the highly multimode nature of the pump, the Raman peaks are generated in specific modes of the fiber, confirming substantial beam cleanup during the stimulated Raman scattering process.

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confidence: 89%

mentioning

confidence: 99%

Stimulated Raman scattering cascade spanning the wavelength range of 523 to 1750 nm using a graded-index multimode optical fiber

Pourbeyram¹,

Agrawal²,

Mafi³

2013

Applied Physics Letters

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“…[1][2][3]. This technique is demonstrated in single-mode fiber both theoretically and experimentally [4,5].…”

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confidence: 99%

Temperature dependence of sapphire fiber Raman scattering

Liu

Tian

et al. 2015

Opt. Lett.

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Anti-Stokes Raman scattering in sapphire fiber has been observed for the first time. Temperature dependence of Raman peaks' intensity, frequency shift, and linewidth were also measured. Three anti-Stokes Raman peaks were observed at temperatures higher than 300°C in a 0.72-m-long sapphire fiber excited by a second-harmonic Nd YAG laser. The intensity of anti-Stokes peaks are comparable to that of Stokes peaks when the temperature increases to 1033°C. We foresee the combination of sapphire fiber Stokes and anti-Stokes measurement in use as a mechanism for ultrahigh temperature sensing.

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“…If its power becomes strong enough, this process can generate a cascade SRS of multiple Stokes bands with its order increasing with fiber-length 18 . SRS cascades were demonstrated first using single mode 36 and smallcore 37 fibers, and later on using large core MMF [38][39][40][41] and highly customized fibers 42 . Considering single mode propagation, the number of Stokes bands depends primarily on the input power.…”

Section: Srs and Fwm In Fibersmentioning

confidence: 99%

Wave-front shaping for nonlinear light propagation in multimode fibers

2017

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Recent remarkable progress in wave-front shaping has enabled control of light propagation inside linear media to focus and image through scattering objects. In particular, light propagation in multimode fibers comprises complex intermodal interactions and rich spatiotemporal dynamics. Control of physical phenomena in multimode fibers and its applications is in its infancy, opening opportunities to take advantage of complex mode interactions. In this work, we demonstrate a wave-front shaping approach for controlling nonlinear phenomena in multimode fibers. Using a spatial light modulator at the fiber's input and a genetic algorithm optimization, we control a highly nonlinear stimulated Raman scattering cascade and its interplay with four wave mixing via a flexible implicit control on the superposition of modes that are coupled into the fiber. We show for the first time versatile spectrum manipulations including shifts, suppression, and enhancement of Stokes and anti-Stokes peaks. These demonstrations illustrate the power of wave-front shaping to control and optimize nonlinear wave propagation.

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Raman Amplification in Multimode Fiber

Cited by 30 publications

References 10 publications

Stimulated Raman scattering cascade spanning the wavelength range of 523 to 1750 nm using a graded-index multimode optical fiber

Stimulated Raman scattering cascade spanning the wavelength range of 523 to 1750 nm using a graded-index multimode optical fiber

Temperature dependence of sapphire fiber Raman scattering

Wave-front shaping for nonlinear light propagation in multimode fibers

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