110 W fibre laser

Dominic, V.; MacCormack, Stuart; Waarts, R.; Sanders, S.; Bicknese, S.; Dohle, Rainer; Wolak, E.; Yeh, Ping-Cheng; Zucker, Erik

doi:10.1049/el:19990792

Cited by 206 publications

(42 citation statements)

References 2 publications

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“…There is a growing interest in the use of guided-wave geometries for high-power laser operation, in both fiber 1,2 and planar 3,4 formats. The use of high-power diode pump lasers requires multimode waveguides for the confinement of these non-diffraction-limited light sources, but most applications require fundamental-mode laser operation.…”

Section: Introductionmentioning

confidence: 99%

Spatial dopant profiles for transverse-mode selection in multimode waveguides

et al. 2002

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We theoretically investigated the effect of the spatial distribution of the active-ion concentration in multimode step-index waveguides on transverse-mode selection for continuous-wave laser operation. We found that uniform doping of a central portion of as much as 60% of the full waveguide core width is highly effective for the selection of fundamental-mode operation, even under highly saturated, high-power conditions. Profiling the dopant distribution to match that of the particular mode desired was also found to be effective, especially if it is the saturated inversion profile that is matched to the shape of the mode.

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Section: Introductionmentioning

confidence: 99%

Spatial dopant profiles for transverse-mode selection in multimode waveguides

et al. 2002

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“…For laser systems with power up to about 100 W, the approach involving co-doping of the medium with Nd 3+ /Yb 3+ ions seems to be particularly attractive [14][15][16]. In such a configuration, neodymium ions function as donors, supplying a portion of their excitation energy in the course of Nd 3+ →Yb 3+ resonant energy transfer.…”

Section: Broadband Luminescence At 1µm Wavelength In Ndmentioning

confidence: 99%

Active optical fibres for application in laser and broadband ASE sources

Dorosz¹,

Dorosz²,

Zając³

et al. 2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The article brings into focus the present state of technology employing active fibres doped with rare earth (RE) ions for applications requiring power supply of several dozen watts and broadband ASE sources. Current trends in development of glasses and in construction of active fibres used in fibre sources of radiation within VIS-NIR range are presented. Technological constraints in the doping of fibre core glasses are discussed, with particular consideration of optimal RE concentration for technical applications. Characteristics of glasses are offered, and the glasses are used for manufacturing optical fibres with luminescence within the visible as well as near-and mid-infrared ranges. Also, requirements and luminescence properties concerning glasses co-doped with e.g. Nd 3+ /Yb 3+ ,Tm 3+ /Ho 3+ and Yb 3+ /Tb 3+ are discussed. Results of research on the impact of technological parameters of glass matrices on luminescence properties of core glasses and optical fibres are quoted. For the doped glasses of which luminescence in a wide spectral range is desired, conditions for their processing into optical fibre systems are mentioned. Additionally, the impact of phonon energy in the glass on producing emission in a specified spectral range is analyzed. Furthermore, the article presents directions of technological studies to solve problems persisting in the phase of glass matrix design, as well as in determining the influence of fibre drawing process on the luminescence properties of core glasses and optical fibres, confirming the differences in luminescence stemming from the drawing process. Finally, some original designs of core glasses and active multicore fibre systems devised for construction of fibre radiation sources are presented.

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“…DCFs are preferred for high power operation, the large inner cladding allowing propagation of the multimode pump beam around the doped active core and multiple crossing across it. Continuous wave (CW) operation with output powers exceeding 110 W has been demonstrated using DCF [33].…”

Section: Tunable 1083 Nm Fiber Lasersmentioning

confidence: 99%

A broadband ytterbium-doped tunable fiber laser for 3He optical pumping at 1083�nm

Tastevin

Grot

Courtade

et al. 2004

Applied Physics B: Lasers and Optics

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Large amounts of hyperpolarized 3 He gas with high nuclear polarization rates are required for use in neutron spin filters or nuclear magnetic resonance imaging of human lung. Very high efficiency can be obtained by metastability exchange optical pumping using multimode lasers to excite the 2 3 S-2 3 P transition at 1083 nm. Broadband Ytterbium-doped tunable fiber lasers have been designed for that particular application. Different options for the architecture of the fiber oscillator are presented and compared. Emphasis is given to a linear cavity configuration that includes a high reflectivity fiber mirror and a low reflectivity tunable fiber Bragg grating. Optical measurements are performed to finely characterize the spectral behavior of the lasers. Atomic response is also quantitatively probed to assess the optimal design of the oscillator for optical pumping. Multimode operation matching the 2 GHz Doppler-broadened helium resonance line and tunability over more than 200 GHz are demonstrated. Boosting the output of this fiber laser with a Yb-doped fiber power amplifier, allfiber devices are built to provide robust, high power turn-key sources at 1083 nm for improved production of laser polarized 3 He. 42.55.Wd; 32.80.Bx PACS

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110 W fibre laser

Cited by 206 publications

References 2 publications

Spatial dopant profiles for transverse-mode selection in multimode waveguides

Spatial dopant profiles for transverse-mode selection in multimode waveguides

Active optical fibres for application in laser and broadband ASE sources

A broadband ytterbium-doped tunable fiber laser for 3He optical pumping at 1083�nm

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