Latest developments in 790nm-pumped Tm-doped fibre laser systems for DIRCM applications

2008 ◽  
Author(s):  
G. Frith ◽  
T. McComb ◽  
B. Samson ◽  
W. Torruellas ◽  
A. Carter ◽  
...  
Keyword(s):  
Fibre Laser ◽  
Laser Systems

scholarly journals Ultra-fast fibre laser systems based on SESAM technology: new horizons and applications

2004 ◽  
Vol 6 ◽  
pp. 177-177 ◽  
Author(s):  
Oleg Okhotnikov ◽  
Anatoly Grudinin ◽  
Markus Pessa
Keyword(s):  
Fibre Laser ◽  
New Horizons ◽  
Fast Fibre ◽  
Laser Systems

Development of fibre laser systems for ring-down and intracavity gas spectroscopy in the near-IR

2004 ◽  
Vol 15 (8) ◽  
pp. 1621-1628 ◽  
Author(s):  
George Stewart ◽  
Peter Shields ◽  
Brian Culshaw
Keyword(s):  
Fibre Laser ◽  
Near Ir ◽  
Laser Systems

Fibre laser cutting: Beam absorption characteristics and gas-free remote cutting

2009 ◽  
Vol 224 (5) ◽  
pp. 1007-1018 ◽  
Author(s):  
A Mahrle ◽  
M Lütke ◽  
E Beyer
Keyword(s):  
Laser Cutting ◽  
Beam Quality ◽  
Sheet Thickness ◽  
Practical Experience ◽  
Fibre Laser ◽  
Experimental Fact ◽  
Attractive Alternative ◽  
Fibre Lasers ◽  
Laser Systems ◽  
Absorption Characteristics

Laser cutting is still the most common industrial application of CO 2 laser systems but currently available high-power fibre lasers seem to be an attractive alternative to the established CO 2 laser sources for several cutting tasks. Practical experience has shown that fibre lasers enable significantly increased travel rates in the case of inert-gas fusion cutting. This advantage in achieving higher cutting speeds in comparison to CO 2 laser cutting is however a clear function of the sheet thickness to be cut. In the first part of this article, possible reasons for this experimental fact are derived from a thermodynamic analysis of the process with consideration of the specific beam absorption characteristics under cutting conditions. After that, in the second part, a quite new laser cutting variant, namely the gas-free remote cutting process that considerably benefits from the high beam quality of fibre laser systems, is presented.

scholarly journals High power red and near-IR generation using four wave mixing in all integrated fibre laser systems

2010 ◽  
Vol 18 (15) ◽  
pp. 16193 ◽  
Author(s):  
Laure Lavoute ◽  
Jonathan C. Knight ◽  
Pascal Dupriez ◽  
William J. Wadsworth
Keyword(s):  
High Power ◽  
Four Wave Mixing ◽  
Fibre Laser ◽  
Wave Mixing ◽  
Near Ir ◽  
Laser Systems

scholarly journals Characterisation of Laser System Power Draws in Materials Processing

2020 ◽  
Vol 4 (2) ◽  
pp. 48
Author(s):  
Nicholas Goffin ◽  
Lewis C. R. Jones ◽  
John Tyrer ◽  
Jinglei Ouyang ◽  
Paul Mativenga ◽  
...  
Keyword(s):  
Laser Processing ◽  
High Speed ◽  
Manufacturing Industry ◽  
Laser System ◽  
Processing System ◽  
Fibre Laser ◽  
Beam Power ◽  
Total System ◽  
Laser Systems ◽  
System Power

Due to their high speed and versatility, laser processing systems are now commonplace in many industrial production lines. However, as the need to reduce the environmental impact from the manufacturing industry becomes more urgent, there is the opportunity to evaluate laser processing systems to identify opportunities to improve energy efficiencies and thus reduce their carbon footprint. While other researchers have studied laser processing, the majority of previous work on laser systems has focused on the beam–material interaction, overlooking the whole system viewpoint and the significance of support equipment. In this work, a methodical approach is taken to design a set of energy modelling terminologies and develop a structured power metering system for laser systems. A 300 W fibre laser welding system is used to demonstrate the application of the power characterization system by utilizing a purpose-built power meter. The laser is broken down according to sub-system, with each part analysed separately to give a complete overall power analysis, including all auxiliary units. The results show that the greatest opportunities for efficiency improvements lie in the auxiliary units that support the laser devices as these were responsible for a majority of the electrical draw; 63.1% when the laser was operated at 240 W, and increasing as the beam power reduced. The remaining power draw was largely apportioned to electrical supply inefficiencies. In this work, the laser device delivered a maximum of 6% of the total system power. The implications of these results on laser processing system design are then discussed as is the suitability of the characterization process for use by industry on a range of specific laser processing systems.

New Laser Machine Tools for Processing Carbon Fibre Reinforced Plastic (CFRP)

2011 ◽  
Vol 496 ◽  
pp. 30-35
Author(s):  
Paul W French ◽  
Alexander Wolynski ◽  
Mo Naeem ◽  
Martin C Sharp
Keyword(s):  
Material Processing ◽  
Carbon Fibre ◽  
Laser System ◽  
Fibre Laser ◽  
Laser Material Processing ◽  
Laser Material ◽  
Reinforced Plastic ◽  
Laser Systems ◽  
Carbon Fibre Reinforced Plastic ◽  
The Uk

The interest in laser material processing of Carbon Fibre Reinforced Plastic (CFRP) over the past few years has increased, especially in the aerospace industry. A number of different laser groups around the world are investigating different laser sources for the express reason of developing a laser material processing centre for machining CFRP for the aerospace and automotive industry. This paper reports on the work of two such groups, in the UK and Germany, who are using fibre laser technology and a diode pumped solid state laser system. The initial results from the two studies are reported and show that these two very different laser systems offer processing capability with respect to machining CFRP.

scholarly journals Numerical model of hybrid mode-locked Tm-doped all-fibre laser

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Aleksandr Donodin ◽  
Vasilii Voropaev ◽  
Daniil Batov ◽  
Dmitrii Vlasov ◽  
Vladimir Lazarev ◽  
...  
Keyword(s):  
Numerical Model ◽  
Average Power ◽  
Spectral Width ◽  
Mode Locking ◽  
Experimental Results ◽  
Fibre Laser ◽  
Model Parameters ◽  
Hybrid Mode ◽  
Fibre Lasers ◽  
Laser Systems

Abstract Ultrafast Tm-doped fibre lasers have been actively studied for the last decade due to their potential applications in precise mid-IR spectroscopy, LIDARs, material processing and more. The majority of research papers is devoted to the comparison between a numerical modelling and experimental results; however, little attention is being paid to the comprehensive description of the mathematical models and parameters of the active and passive components forming cavities of Tm-doped all-fibre lasers. Thus, here we report a numerical model of a stretched-pulsed Tm-doped fibre laser with hybrid mode-locking and compare it with experimental results. The key feature of the developed numerical model is employment of the experimentally measured dispersion coefficients and optimisation of some model parameters, such as the bandwidth of the spectral filter spectral filtering and the saturation power of the active fibre, for a conformity with the experiment. The developed laser emits 331.7 fs pulses with a 23.8 MHz repetition rate, 6 mW of average power, 0.25 nJ of pulse energy, and a 21.66 nm spectral bandwidth at a peak wavelength of 1899.5 nm. The numerical model characteristics coincide with experimentally achieved spectral width, pulse duration, and average power with inaccuracy of 4.7%, 5.4%, and 22.9%, respectively. Moreover, in the discussion of the work the main possible reasons influencing this inaccuracy are highlighted. Elimination of those factors might allow to increase accuracy even more. We show that numerical model has a good agreement with the experiment and can be used for development of ultrafast Tm-doped fibre laser systems.

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