Research interests

• Laser matter interaction fundamentals
• Precision diagnostic systems for applications in AI optimisation of AM processes
• Large-area powderbed systems
• Pulsed laser deposition
• High-speed digital holography and interferometry 
• Laser micro-structuring and machining
• Sensor development

 

Current situation

 

Krste currently holds a position as a Research Associate at the Centre for Industrial Photonics, Institute for Manufacturing. His research interests revolve around high-speed dynamics in physical systems, particularly in high-energy laser physics. He is currently the supervisor for two doctoral students, Nadeem El Gabbani who is working on thrust balances for nano-newton force measurements and Lily Delimata, who is working on new additive manufacturing technologies for medical applications. Krste is also a supervisor for MRes projects for the EPSRC Centre for Doctoral Training (CDT) in Ultra Precision Engineering. Krste is a member of the management committee for EPSRC CIM in Laser Based Production Processes. Krste is a member of the AILU Executive and Early Career Researchers (ECR) committees. Krste is also a contributor to the Cambridge Advanced Leadership Programme, at the Judge Business School.

 

Background

 

Krste obtained his B.Sc in Physics from King's College London in 2004 and MSc in 2005 in Physics. Following his degrees he moved into business technology R&D, operating within the areas of Strategy and Product Development. During that time, Krste worked with some of the worlds leading firms across a range of sectors including NOKIA, Barclays Wealth Management, Dresdner Kleinwort, Royal Bank of Scotland, Deutschebank, Barclays and Linklaters. In 2009 Krste returned to pursue his academic interests by undertaking an MRes with the EPSRC CDT in Integrated Photonic and Electronic Systems (IPES), concentrating on ultrafast manufacturing laser amplification architectures and in 2010 proceeded to undertake his PhD studies under the supervision of Prof. Bill O’Neill. His doctoral thesis, "Temporal pulse design and analysis of silicon ablation using advanced pulse shaping and digital holography in the nanosecond domain” was carried out in conjunction with a TSB SMART Laser project, developing the next generation of low-cost, temporally addressable fibre lasers, in conjunction with the Optoelectronics Research Centre at the University of Southampton and SPI Lasers, Southampton. During this time, Krste invented and developed a variety of diagnostic tools for examining ultrafast laser phenomena including the FalconGHz - a GHz rate full-field pulsed digital holographic system. On completing his PhD, Krste returned to industry and joined the Home Office Digital Transformation team where in conjunction with the Government Digital Service he worked to develop the Registered Traveller programme, and led the strategy aimed at improving the Border Force academic & student UK entry procedures. On completing his work at The Home Office, Krste returned to the IfM, this time working as part of a National EPSRC Centre for Innovative Manufacturing in Laser Based Production processes, Energy Resilient Manufacturing Lasers Programme (Part 2) as well as a variety of projects relating to additive manufacturing, ultrafast phenomena and high precision diagnostics techniques. More recently, he has extended his research activities to laser-based thrust and vectoring for space exploration applications.

 

 

My research projects 

• EPSRC Centre for Innovative Manufacturing in Laser Based Production Processes, EP/K030884/1 

• Application of Digital Holographic Imaging in short-range process dynamics during AM powderbed processes, EP/K030884/1(NMZM/311)

• GHz-rate full-filed holographic observation of Ultra-Short Pulsed Laser dynamics generated from acrylic polymer, aluminium and steel targets and their crrelation to RF emissions, FA9550-17-1-0337

• THz-rate holographic observation and optimisation of LBP processes, EP/K030884/1(NMZM/243)

• EPSCR Energy Resilient Manufacturing Part II, EP/P012248/1

• Diagnostics and process improvement of ultrafast welding of highly dissimilar materials, EP/K030884/1(NMZM/267)

• Fundamentals of Laser Shock Peening in AM applications, EP/K030884/1(NMZM/289)

 

My research strategy

 

Radical advances in sensing technologies, a fundamental understanding of sensor data, and methods of transforming the data into machine (and ultimately human) useable information will need to be developed to take full advantages of the next generation of manufacturing technologies, and to enable engineers to make confident decisions from the factory floor to the board room. In light of these challenges, I focus on delivering research that link sensing layer technologies and production processes, and the data and information layers that connect them, across a range of laser-based production processes. The strategy is focused on demonstrating improved part reliability, production efficiency and cost reduction through "AI-enabled process optimisation based on dynamic process fingerprinting".

 

 

 

 

 

My research Landscape

 

It is widely accepted that we are on the brink of a 4th industrial revolution, driven by increasingly powerful data communication and processing. The emergence of the Industrial Internet of Things and the impending Industry 4.0 encompasses highly flexible processes, decentralised decision making, together with modelling of the product, the production process and the production equipment. It is driving the current key challenges for manufacturers namely (i) reducing time-to-market; (ii) enhancing flexibility; (iii) increasing quality; (iv) increasing efficiency and (v) in- creasing productivity.

 

The most innovative and successful companies have under- stood and embraced these challenges, while addressing some of the most pressing challenges of our times. However, within modern manufacturing, the arrival of novel manufacturing tools and methods has seen that this approach lagging behind; even some of the most advanced processes still rely on post- process diagnostics while a fundamental understanding of the processes, relevant sensors data and our ability to interpret the vast amount of data from these processes remains an industry-wide challenge.

 

 

 

 

 

 

Selected publications

 

Krste Pangovski, Peh Siong Teh, Dejiao Lin, Shaiful Alam, David Richardson, William O’Neill. “Pulse Energy Packing Effects on Material Transport During Laser Processing of < 1|1|1 > Silicon”, Appl. Phys. A (2018) 124: 5. https://doi.org/10.1007/s00339-017-1415-2

 

Krste Pangovski, Omonigho B. Otanocha, Shan Zhong, Martin Sparkes, Zhu Liu, William O’Neill, Lin Li. "Investigation of plume dynamics during picosecond laser ablation of H13 steel using high-speed digital holography." Applied Physics A, February 2017. DOI: 10.1007/s00339-016-0589-3.

 

Krste Pangovski, Martin Sparkes, William O’Neill. "A holographic method for optimisation of laser-based production processes". Advanced Opt. Technol., Volume 5, Issue 2, Pages 177–186, DOI: 10.1515/aot-2015-0057, April 2016

 

John Bulmer, Thomas Bullard, Brian Dolasinski, John Murphy, Martin Sparkes, Krste Pangovski, William O’Neill, Peter Powers, and Timothy Haugan. Tunable Broadband Radiation Generated Via Ultrafast Laser Illumination of an Inductively Charged Superconducting Ring.

Sci Rep. 2015; 5: 18151. Published online 2015 Dec 11. doi:  10.1038/srep18151

 

Ali Gökhan Demir, Krste Pangovski, William O'Neill and Barbara Prevital, "Investigation of pulse shape characteristics on the laser ablation dynamics of TiN coatings in the ns regime", Journal of Physics D: Applied Physics Volume 48 Number 23, 2015 J. Phys. D: Appl. Phys. 48 235202 doi:10.1088/0022-3727/48/23/235202

 

Ali Gokhan Demir, Krste Pangovski, William O'Neill, Barbara Previtali, "Laser micromachining of TiN coatings with variable pulse durations and shapes in ns regime", Surface and Coatings Technology, Available online 19 September 2014, ISSN 0257-8972, http://dx.doi.org/10.1016/j.surfcoat.2014.09.021. (http://www.sciencedirect.com/science/article/pii/S0257897214008305)

 

Pangovski, K and Sparkes, M and Cockburn, A and O'Neill, W and Teh, PS and Lin, D and Richardson, D (2014) "Control of Material Transport Through Pulse Shape Manipulation-A Development Toward Designer Pulses." IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 20. ISSN 1077-260X

 

 

Conference proceedings

 

Krste Pangovski and William O'Neill, "Application of High-Speed Holographic Imaging in Laser-Matter Interactions", AILU ILAS 2019, Crewe, UK.

 

Karen X.Z. Yu, Martin R Sparkes, Krste Pangovski, and William O’Neill. "Monitoring and closed loop feedback control of ultrafast glass welding". euspen’s 16th International Conference &
Exhibition, Nottingham, UK, May 2016.

 

Krste Pangovski, Martin Sparkes and William O’Neill. “Investigation into the ablation mechanisms of Titanium, Aluminium, Copper and Brass in percussion drilling operations, using ultra-high speed digital holography”. Photonex 2015, October 2015, Coventry, UK

 

Pangovski, K., Sparkes, M., Cockburn, A. and O’Neill, W. (2013).  “Digital holograph analysis of laser induced micro plasma in micro machining applications: temporal and spatial comparisons to thermo nuclear explosions”, presented abstract at the 2^nd Annual EPSRC Manufacturing the Future Conference, 17-18 September 2013, Cranfield, UK.  This presentation won the CIRP sponsored best presentation award.

 

Krste Pangovski, Peh Siong Teh, Shaif’ul Alam, David Richardson, Ali Gökhan Demir, William O'Neill. “Designer pulses for precise machining of Silicon – A step towards Photonic Compositions”, ICALEO 2012, Los Angeles, CA, USA

 

Krste Pangovski, Kun Li, William O'Neill. “Investigation of low nanosecond light-matter interaction mechanisms”. ICALEO October 2011, Orlando, FL, USA.

 

Krste Pangovski, William O'Neill. “Silicon response study to 1000 ns - 1 ns single pulses“. AILU September 2011, Cambridge, UK.

 

Krste Pangovski, Kun Li, William O'Neill. “Application of picosecond lasers for surface modification and polishing”. Photonics London, July 2011, London, UK.

 

Magazine articles

 

Krste Pangovski, Martin Sparkes and William O’Neill. “A new way to diagnose and optimise laser-material processing operations”, The Laser User, Issue 77, p16-17, ISSN 1755-5140

 

Krste Pangovski, William O'Neill. “Designer Laser pulses for materials processing” The Laser User, Issue 67, p26-28, ISSN 1755-5140

 

Keynotes

 

Krste Pangovski, "Resource Efficiency Improvements through Laser Processing of Designer Materials"

CLEO Europe, May 2013 - European Conference on Lasers and Electro-Optics, Munich, Germany

 

Invited talks

 

“Applications of Ultrafast Holography for Diagnostics of Industrial Laser Processes & Interactions”, Optoelectronics Research Centre, University of Southampton, United Kingdom, December 2015

 

“An overview of energy and material transport in high power laser matter interaction: the industry challenge”, HiLASE, Institute of Physics ASCR, Dolní B?ežany, Prague, Czech Republic, November 2017

 

Teaching

 

"Energy beam applications in manufacturing", EPSRC Centre for Doctoral Training in Ultra precision, University of Cambridge, Cambridge, UK. 2018-Present

 

“Technologies set to change the business world: Additive Manufacturing", Cambridge Advanced Leadership Programme, Technology panel, Judge Business School, University of Cambridge, Cambridge, UK. 2014-Present

“High Power Laser Technology for the Construction Industry”, Laing O’Rourke Graduate Training Programme, University of Cambridge/ Laing O’Rourke Institute, Cambridge, UK, 2015-Present

 

“High Power Laser Technology in Manufacturing”, CIS International Summer Programme, Hanyang University/University of Cambridge, UK, 2015