Fabrication of Yb-doped silica glass through the modification of MCVD process

Sekiya, Edson Haruhico; Barua, Pranabesh; Saito, Kazuya; Ikushima, Akira J.

doi:10.1016/j.jnoncrysol.2008.04.045

Cited by 49 publications

(35 citation statements)

References 16 publications

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“…As described in the earlier reported results, this process suffers from poor repeatability [12], [22], "clogged" delivery lines due to condensation of precursor materials [22], [23], shorter usable preform length [13], [14], lower RE concentrations [12], [13], non-uniform RE distribution along the length of the preform [15] and higher OH − content in the fibers [11], [18]. So, the prime target of this study was to demonstrate a standardized process technology to fabricate LC, low numerical aperture (NA) and high Yb-doped fibers for laser applications with higher reproducibility.…”

Section: A Optimization Of the Process Parametersmentioning

confidence: 90%

An Optimized Vapor Phase Doping Process to Fabricate Large Core Yb-Doped Fibers

Saha

Pal

et al. 2015

J. Lightwave Technol.

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The paper demonstrates a standardized process of vapor phase doping to fabricate large core Yb-doped preforms with longer useful length in reproducible manner. The optimization of the process led to successful achievement of Yb-doped core thickness of 4.5 mm (in 14.8 mm of preform diameter) by depositing up to 30 number of core layers with controlled amount of generated precursor vapors. The influence of the process parameters was studied rigorously to enhance the useful preform length up to 380 mm. A combination of Yb and Al in different proportions was doped into the core with uniform dopant concentration along the length by adjusting few process parameters efficiently. The Al 2 O 3 concentration up to the level of 17.8 mol% has been achieved successfully which resulted in NA of 0.31. This is the highest ever doping of Al in passive fibers by any modified chemical vapor deposition process. The Yb 2 O 3 content in the active fibers is as high as 0.47 mol%.

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Section: A Optimization Of the Process Parametersmentioning

confidence: 90%

An Optimized Vapor Phase Doping Process to Fabricate Large Core Yb-Doped Fibers

Saha

Pal

et al. 2015

J. Lightwave Technol.

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“…So, researchers tried to find an approach to deposit Yb 2 O 3 just like SiO 2 and GeO 2 . As the development of material science, an organic Yb compound called Yb(DPM) 3 (DPM = dipivaloymethanate ligand (C 11 H 19 O 2 )) [9] was chosen because it is volatile when being heated above 200 • C. Sekiya et al set two furnaces for Yb(DPM) 3 and AlCl 3 . High purity of He went through the furnace to carry Yb(DPM) 3 and AlCl 3 , which were in gas phase, into the substrate tube.…”

Section: Fabrication Technology Of Yb 3+ Doped Fibersmentioning

confidence: 99%

Development and prospect of high-power doped fibers

Wang

Chen

2018

High Pow Laser Sci Eng

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Ytterbium-doped fibers have become the optimum gain media of high-power fiber lasers thanks to a simple energy structure, which strongly reduces the excited state absorption, and a low quantum defect and a high optic-optic conversion efficiency, which means the low thermal load. In this paper, we take a review of the current state of the art in terms of Yb 3+ doped fibers for high-power fiber lasers, including the development of the fabrication techniques. The research work to overcome the challenges for Yb 3+ doped fibers, which affect the stability of output power and beam quality, will be demonstrated. Direction of further research is presented and the goal is to look for a fiber design, to boost single fiber output power, stabilize the laser power and support robust single-mode operation.

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“…Silica preforms exhibiting uniform dopant concentrations in both radial and longitudinal directions have been successfully prepared with good reproducibility [13]. For example, a Yb-doped silica fiber was prepared using this technique with a background loss at 25 dB·km −1 at 1200 nm, which showed lasing up to 200 W with a slope efficiency of about 80% [14].…”

Section: Silica-based Optical Fibersmentioning

confidence: 99%

Glass and Process Development for the Next Generation of Optical Fibers: A Review

Ballato

Ebendorff‐Heidepriem

Zhao

et al. 2017

Fibers

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Applications involving optical fibers have grown considerably in recent years with intense levels of research having been focused on the development of not only new generations of optical fiber materials and designs, but also on new processes for their preparation. In this paper, we review the latest developments in advanced materials for optical fibers ranging from silica, to semi-conductors, to particle-containing glasses, to chalcogenides and also in process-related innovations.

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Fabrication of Yb-doped silica glass through the modification of MCVD process

Cited by 49 publications

References 16 publications

An Optimized Vapor Phase Doping Process to Fabricate Large Core Yb-Doped Fibers

An Optimized Vapor Phase Doping Process to Fabricate Large Core Yb-Doped Fibers

Development and prospect of high-power doped fibers

Glass and Process Development for the Next Generation of Optical Fibers: A Review

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