Excitation of individual Raman Stokes lines in the visible regime using rectangular-shaped nanosecond optical pulses at 530 nm

Chen, Kang Kang; Alam, Shaif-ul; Horák, Péter; Codemard, Christophe A.; Malinowski, A.; Richardson, David J.

doi:10.1364/ol.35.002433

Cited by 18 publications

(3 citation statements)

References 6 publications

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“…As seen in Fig.7, for both lengths of fiber, the spectrum appears much flatter than that of the first order Raman Stokes. This is very different from the discrete cascaded Raman lines observed in a 1km-long silica glass fiber [17]. We attribute such a continuum rather than discrete Raman Stokes lines here to (1) the much higher Raman gain coefficient and much broader Raman bands of tellurite glass compared to those of silica and (2) the nature of the multiple Raman peaks of tellurite glass.…”

Section: Generation Of Higher-order Raman Stokes and Antistokes Inmentioning

confidence: 56%

1.06 $\mu$m Picosecond Pulsed, Normal Dispersion Pumping for Generating Efficient Broadband Infrared Supercontinuum in Meter-Length Single-Mode Tellurite Holey Fiber With High Raman Gain Coefficient

Shi

Feng

Horák

et al. 2011

J. Lightwave Technol.

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Abstract-We investigate efficient broadband infrared supercontinuum generation in meter-length single-mode smallcore tellurite holey fiber. The fiber is pumped by 1.06μ μ μ μm picosecond pulses in the normal dispersion region. The high Raman gain coefficient and the broad Raman gain bands of the tellurite glass are exploited to generate a cascade of Raman Stokes orders, which initiate in the highly normal dispersion region and quickly extend to longer wavelengths across the zero dispersion wavelength with increasing pump power. A broadband supercontinuum from 1.06μ μ μ μm to beyond 1.70μ μ μ μm is generated. The effects of the pump power and of the fiber length on the spectrum and on the power conversion efficiency from the pump to the supercontinuum are discussed. Power scaling indicates that using this viable normal dispersion pumping scheme, 9.5W average output power of infrared supercontinuum and more than 60% conversion efficiency can be obtained from a 1m-long tellurite fiber with a large-mode-area of 500μ μ μ μm 2 .

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Section: Generation Of Higher-order Raman Stokes and Antistokes Inmentioning

confidence: 56%

1.06 $\mu$m Picosecond Pulsed, Normal Dispersion Pumping for Generating Efficient Broadband Infrared Supercontinuum in Meter-Length Single-Mode Tellurite Holey Fiber With High Raman Gain Coefficient

Shi

Feng

Horák

et al. 2011

J. Lightwave Technol.

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“…Selective excitation of Raman Stokes wavelengths can be realized by using a flat-topped rectangular pump pulse, since all points across the pulse experience identical Raman gain. Using this concept, selective excitation of individual Raman Stokes lines of up to the ninth order has been reported previously by our group [5]. However, it was found that with increased pump peak power, the suppression ratio of each excited Stokes line decreased and also the spectral bandwidths of the Stokes lines were broadened by other nonlinear effects.…”

Section: Introductionmentioning

confidence: 61%

High repetition rate, high pulse energy, Raman shifted wavelength selectable fiber laser source in the visible

Alam

Kang

et al. 2016

Lasers Congress 2016 (ASSL, LSC, LAC)

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“…Actually, some early studies on the wavelength conversion in visible or near-infrared region have verified that rectangular pulse was superior to promote pump energy transfer [21][22][23][24], comparing to Gaussian pump pulse. Since it offered the nearly consistent Raman gain across the temporal profile.…”

Section: Introductionmentioning

confidence: 99%

Efficient Raman pulse fiber laser pumped by a dissipative soliton resonance pulse near 2 μm

Liu¹,

Li²,

Luo³

et al. 2023

Preprint

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A high-efficiency Raman conversion from 1.987 μm to 2.177 μm is demonstrated experimentally in 45 m GeO2-doped silica fiber, adopting a dissipative soliton resonance (DSR) rectangular pulse as the pump. Over the entire spectral distribution, the spectral purity of the first-order Raman pulse is up to 96.8%, suggesting a nearly complete pump depletion before the onset of cascaded Raman shifts. The corresponding pump-to-Raman conversion efficiency of 67.4% is the highest up to date in this spectral region. Meanwhile, a large Raman pulse energy of 1.03 μJ was obtained at the repetition rate near MHz level, corresponding to 0.893 W average power. In the total output, the Raman-dominated spike has a Full Width Half Maximum (FWHM) of 1.18 ns far narrower than DSR’s pulse duration of 10.25 ns. The results indicate that DSR is a promising candidate for developing efficient Raman nanosecond pulse fiber laser in mid-infrared (MIR) region.

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Excitation of individual Raman Stokes lines in the visible regime using rectangular-shaped nanosecond optical pulses at 530 nm

Cited by 18 publications

References 6 publications

1.06 $\mu$m Picosecond Pulsed, Normal Dispersion Pumping for Generating Efficient Broadband Infrared Supercontinuum in Meter-Length Single-Mode Tellurite Holey Fiber With High Raman Gain Coefficient

1.06 $\mu$m Picosecond Pulsed, Normal Dispersion Pumping for Generating Efficient Broadband Infrared Supercontinuum in Meter-Length Single-Mode Tellurite Holey Fiber With High Raman Gain Coefficient

High repetition rate, high pulse energy, Raman shifted wavelength selectable fiber laser source in the visible

Efficient Raman pulse fiber laser pumped by a dissipative soliton resonance pulse near 2 μm

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