Dr. Mike Durkin Profile

Dr. Mike Durkin

at TRUMPF Laser UK Ltd.

SPIE Involvement:

Author

Publications (5)

Proceedings Article | 12 March 2024 Presentation + Paper

Splice optimisation between dissimilar fibres in the presence of dopant diffusion

Vincenzo Scarnera, Christophe Codemard, Mike Durkin, Michalis Zervas

Proceedings Volume 12865, 1286515 (2024) https://doi.org/10.1117/12.3003118

KEYWORDS: Dopants, Diffusion, Multimode fibers, Refractive index, Modeling, Fiber lasers, Single mode fibers

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Proceedings Article | 2 March 2020 Paper

Multi-kilowatt fibre laser with azimuthal mode output beam for advanced material processing

Natasha Vukovic, Jaclyn Chan, Christophe Codemard, Michalis Zervas, Stephen Keen, Rongshen Chen, Richard Jesset, Iain Botheroyd, Mike Durkin, Mark Greenwood

Proceedings Volume 11266, 1126618 (2020) https://doi.org/10.1117/12.2545666

KEYWORDS: Laser cutting, Fiber lasers, Materials processing, Laser processing, High power fiber lasers, High power lasers, Optical fibers, Beam controllers, Laser applications, Laser development

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Proceedings Article | 11 February 2011 Paper

Distribution of photodarkening-induced loss in Yb-doped fiber amplifiers

Michalis Zervas, Fabio Ghiringhelli, Michael Durkin, Ian Crowe

Proceedings Volume 7914, 79140L (2011) https://doi.org/10.1117/12.877868

KEYWORDS: Amplifiers, Fiber amplifiers, Fiber lasers, Ytterbium, Laser systems engineering, Continuous wave operation, Signal attenuation, Laser applications, Cladding

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Proceedings Article | 23 February 2006 Paper

High peak power high rep-rate pulsed fiber laser for marking applications

M. N. Zervas, M. Durkin, F. Ghiringhelli, K. Vysniauskas, L. Hickey, A. Gillooly, P. Turner, B. Kao

Proceedings Volume 6102, 61020Q (2006) https://doi.org/10.1117/12.645553

KEYWORDS: Laser marking, Pulsed laser operation, Laser applications, Pulsed fiber lasers, Amplifiers, Fiber amplifiers, Q switched lasers, Fiber lasers, Ytterbium, Absorption

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Proceedings Article | 7 June 2004 Paper

Latest development of high-power fiber lasers in SPI

Stephen Norman, Mikhail Zervas, Andrew Appleyard, Michael Durkin, Ray Horley, Malcolm Varnham, Johan Nilsson, Yoonchan Jeong

Proceedings Volume 5335, (2004) https://doi.org/10.1117/12.537739

KEYWORDS: Fiber lasers, Laser applications, Diodes, High power fiber lasers, Optical amplifiers, Laser systems engineering, Cladding, Structured optical fibers, Continuous wave operation, Reliability

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High Power Fiber Lasers (HPFLs) and High Power Fiber Amplifiers (HPFAs) promise a number of benefits in terms of their high optical efficiency, degree of integration, beam quality, reliability, spatial compactness and thermal management. These benefits are driving the rapid adoption of HPFLs in an increasingly wide range of applications and power levels ranging from a few Watts, in for example analytical applications, to high-power >1kW materials processing (machining and welding) applications. This paper describes SPI’s innovative technologies, HPFL products and their performance capabilities. The paper highlights key aspects of the design basis and provides an overview of the applications space in both the industrial and aerospace domains. Single-fiber CW lasers delivering 1kW output power at 1080nm have been demonstrated and are being commercialized for aerospace and industrial applications with wall-plug efficiencies in the range 20 to 25%, and with beam parameter products in the range 0.5 to 100 mm.mrad (corresponding to M² = 1.5 to 300) tailored to application requirements. At power levels in the 1 - 200 W range, SPI’s proprietary cladding-pumping technology, GTWave^TM, has been employed to produce completely fiber-integrated systems using single-emitter broad-stripe multimode pump diodes. This modular construction enables an agile and flexible approach to the configuration of a range of fiber laser / amplifier systems for operation in the 1080nm and 1550nm wavelength ranges. Reliability modeling is applied to determine Systems martins such that performance specifications are robustly met throughout the designed product lifetime. An extensive Qualification and Reliability-proving programme is underway to qualify the technology building blocks that are utilized for the fiber laser cavity, pump modules, pump-driver systems and thermo-mechanical management. In addition to the CW products, pulsed fiber lasers with pulse energies exceeding 1mJ with peak pulse powers of up to 50kW have been developed and are being commercialized. In all cases reducing the total “cost of ownership” for customers and end users is our primary objective.

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