A 1.3 kW Raman fiber laser

Zhang, Lei; Jiang, Huawei; Feng, Yan

doi:10.1364/fbta.2014.ff4b.1

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…The numerical aperture is 0.275, which corresponds to a peak refractive-index difference to the pure-silica cladding of 0.026. From this, the Raman gain coefficient g R can be estimated to 1.19 × 10 −13 m/W in the center of the core for unpolarised light at 975 nm [10,11]. The propagation loss was measured to 1.7 dB/km at the pump wavelength and 1.5 dB/km at the Stokes wavelength of 1019 nm.…”

Section: Multimode Raman Gain Fibermentioning

confidence: 99%

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High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

et al. 2015

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We describe novel fiber Raman lasers pumped directly by spectrally combined high power multimode laser diodes at ∼975 nm and emitting at ∼1019 nm. With a commercial multimode graded-index fiber, we reached 20 W of laser output power with a record slope efficiency of 80%. With an in-house double-clad fiber, the beam quality improved to M 2 = 1.9, albeit with lower output power and slope efficiency due to higher fiber loss. We believe this is the first publication of a fiber Raman laser cladding-pumped directly by diodes.

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Section: Multimode Raman Gain Fibermentioning

confidence: 99%

“…As an example, a YDFL-pumped fiber Raman laser reached 1.3 kW of CW output power at 1120 nm with high overall conversion efficiency [11]. Still, the use of a two-stage pumping scheme makes the FRLs more complex and is only practical for certain wavelengths.…”

Section: Introductionmentioning

confidence: 99%

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

et al. 2015

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“…Raman fiber lasers have gained attention in recent years due to their broad gain bandwidth and wavelength-insensitive pumping [1][2][3][4][5][6][7]. With low heat loads due to the inherently small quantum defect and long fiber lengths, they are expected to be highly resistant to thermal degradation and transverse modal instabilities (TMI) [1,4,8].…”

Section: Introductionmentioning

confidence: 99%

Cladding-pumped Raman laser with M² of 1.3 and 400 µJ first Stokes energy

et al. 2023

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Cladding-pumped Raman lasers have often been cited for their potential for brightness enhancement, but so far have never achieved high power and beam quality simultaneously. By utilizing a novel fiber geometry with a larger cladding to core ratio than current high power Raman fiber lasers for brightness enhancement (BE-RFLs), a noise-seeded Raman fiber laser pumped by a 100 ns pulsed laser with record beam quality is achieved with M 2 = 1.3 and 0.4 mJ 1 st Stokes output, with an instantaneous brightness enhancement of 60. The results here support the hypothesis that the limiting factor to high beam quality in BE-RFLs is Raman conversion in the pump cladding, rather than higher order core modes as in most conventional fiber lasers.

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Cladding-pumped Raman laser with M^2 of 1.3 and 400 µJ first Stokes energy

Richardson¹,

Roumayah²,

Anderson³

et al. 2023

Preprint

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Cladding-pumped Raman lasers have often been cited for their potential for brightness enhancement, but so far have never achieved high power and beam quality simultaneously. By utilizing a novel fiber geometry with a larger cladding to core ratio than current high power Raman fiber lasers for brightness enhancement (BE-RFLs), a noise-seeded Raman fiber laser pumped by a 100 ns pulsed laser with record beam quality is achieved with M^2 = 1.3 and 0.4 mJ 1st Stokes output, with an instantaneous brightness enhancement of 60. The results here support the hypothesis that the limiting factor to high beam quality in BE-RFLs is Raman conversion in the pump cladding, rather than higher order core modes as in most conventional fiber lasers.

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A 1.3 kW Raman fiber laser

Cited by 3 publications

References 2 publications

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

Cladding-pumped Raman laser with M² of 1.3 and 400 µJ first Stokes energy

Cladding-pumped Raman laser with M^2 of 1.3 and 400 µJ first Stokes energy

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A 1.3 kW Raman fiber laser

Cited by 3 publications

References 2 publications

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

High-Power Continuous-Wave Directly-Diode-Pumped Fiber Raman Lasers

Cladding-pumped Raman laser with M2 of 1.3 and 400 µJ first Stokes energy

Cladding-pumped Raman laser with M^2 of 1.3 and 400 µJ first Stokes energy

Contact Info

Product

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Cladding-pumped Raman laser with M² of 1.3 and 400 µJ first Stokes energy