High-power Cascaded Raman Fiber Laser with 41-W output power at 1480-nm band

Emori, Yoshihiro; Tanaka, Kenichi; Headley, C.; Fujisaki, Akira

doi:10.1109/cleo.2007.4452389

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…In practice, however, when operating a cascaded Raman at modest power levels of up to a few tens of watts, the lasers operate stably without any effort at isolation between the rare-earth cavity and the Raman cavity [17,18]. Even at 40 W output power, a 1480 nm Raman laser could operate stably without isolation between the cavities [19]. At higher operating powers, however, the stability of the system can suffer substantially due to feedback [20,21].…”

Section: Raman Wavelength Conversionmentioning

confidence: 99%

“…One significant limitation of early high-power Raman lasers operating at 1480 nm that used conventional Raman fibers in the Raman cavity was unwanted scattering into the next Stokes order at 1583 nm [19]. For example, for 125 m of Raman fiber in the cascaded Raman fiber laser (CRFL), the 1583 nm peak was only 15 dB below the 1480 nm peak at 41 W of output power.…”

Section: Cascaded Raman Lasers Using Filter Fibersmentioning

confidence: 99%

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Raman fiber lasers

Supradeepa

Feng

Nicholson³

2017

J. Opt.

174

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High-power fiber lasers have seen tremendous development in the last decade, with output powers exceeding multiple kilowatts from a single fiber. Ytterbium has been at the forefront as the primary rare-earth-doped gain medium owing to its inherent material advantages. However, for this reason, the lasers are largely confined to the narrow emission wavelength region of ytterbium. Power scaling at other wavelength regions has lagged significantly, and a large number of applications rely upon the diversity of emission wavelengths. Currently, Raman fiber lasers are the only known wavelength agile, scalable, high-power fiber laser technology that can span the wavelength spectrum. In this review, we address the technology of Raman fiber lasers, specifically focused on the most recent developments. We will also discuss several applications of Raman fiber lasers in laser pumping, frequency conversion, optical communications and biology.

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Section: Raman Wavelength Conversionmentioning

confidence: 99%

Section: Cascaded Raman Lasers Using Filter Fibersmentioning

confidence: 99%

Raman fiber lasers

Supradeepa

Feng

Nicholson³

2017

J. Opt.

174

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“…In fact, there is no restriction on the higher order of SRS signals in theory, and a fifth order Raman fiber laser has already been realized in experiment [18]. But in silicon the transparent waveband is only in the mid-infrared, from 3 to 6 µm, so the SRS signal can only go up to sixth order.…”

Section: Modelmentioning

confidence: 99%

Mid-infrared light generation by high order SRS effect in silicon ring cavity

Zhang¹,

Feng²,

Zhang³

et al. 2011

J. Opt.

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We have numerically investigated the generation of a fourth order stimulated Raman scattering (SRS) signal in a silicon ring cavity. Output power saturation of the silicon Raman laser has been observed. The influences of effective free carrier life, length of ring cavity and coupling ratio on the signal generation are discussed based on our simulation work. Finally, we put forward a double ring cavity scheme to improve the output characteristics of the silicon Raman laser.

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“…For example, in the case of 1117nm to 1480nm, the conversion efficiency has been < 48% while the quantum limited conversion efficiency is 75% [1]. This number dropped further to < 40% in early demonstrations for power scaling for a Raman laser with 40W at 1480nm [11], due to unwanted scattering of the 1480nm light to the next Stokes wavelength at 1590nm. This resulted in the use of short and suboptimal lengths of Raman fiber reducing the efficiency.…”

Section: Introductionmentioning

confidence: 99%

A high efficiency architecture for cascaded Raman fiber lasers

Supradeepa¹,

Nichsolson²,

Headley³

et al. 2013

Opt. Express

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We demonstrate a new high efficiency architecture for cascaded Raman fiber lasers based on a single pass cascaded amplifier configuration. Conversion is seeded at all intermediate Stokes wavelengths using a multi-wavelength seed source. A lower power Raman laser based on the conventional cascaded Raman resonator architecture provides a convenient seed source providing all the necessary wavelengths simultaneously. In this work we demonstrate a 1480nm laser pumped by an 1117nm Yb-doped fiber laser with maximum output power of 204W and conversion efficiency of 65% (quantum-limited efficiency is ~75%). We believe both the output power and conversion efficiency (relative to quantum-limited efficiency) are the highest reported for cascaded Raman fiber lasers.

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High-power Cascaded Raman Fiber Laser with 41-W output power at 1480-nm band

Abstract: A cascaded Raman laser with 41-W CW output at 1480-nm band was demonstrated by a 65-m silica-based highly nonlinear fiber as the Raman gain medium.

Cited by 11 publications

References 5 publications

Raman fiber lasers

Raman fiber lasers

Mid-infrared light generation by high order SRS effect in silicon ring cavity

A high efficiency architecture for cascaded Raman fiber lasers

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