About Us

Sphere Ultrafast Photonics was founded in September 2013 by Helder Crespo and Rosa Romero from the University of Porto, Portugal, and by Anne L'Huillier, Miguel Miranda, Cord Arnold and Thomas Fordell from Lund University, Sweden

Our team is devoted to world-class ultrafast pulsed laser solutions, providing its customers with products that highly improve the performance of femtosecond laser applications.



Rosa Romero received her Degree and MSc in Physics from the University of Santiago de Compostela. Her experience in lasers started 15 years ago, working in nonlinear propagation and laser-matter interaction. During her PhD, at the University of Porto, she develop new optical fiber sensors and nano-devices for telecommunications. She worked in industry in the design and product development of nanosecond high power pulsed fiber lasers for 7 years. Currently she is devoted to the development of new solutions for the ultrafast laser market. She also holds an EMBA by the Porto Business School.

Helder Crespo received his Degree and PhD in Physics from IST, Lisbon. During his thesis he pioneered a technique for generating multicolour ultrafast pulses at LOA, Palaiseau, France, and built the first few-cycle femtosecond laser in Portugal. He was a visiting scientist at MIT, USA, where he designed and built CEP-stable sub-two-cycle lasers. He is co-founder of the Ultrashort Pulse Laboratory of the University of Porto, where most of his research is performed today. Apart from physics and the occasional hologram, he enjoys skiing, film and travelling.

Anne L'Huillier grew up in Paris and received her MSc degree in Physics from Université Pierre and Marie Curie. Her thesis work performed at the Commissariat à l'Energie Atomique, Saclay, France, was on multiple ionization of rare gases, using, at the time, picosecond lasers. She moved to Sweden in 1995, then starting to work with femtosecond lasers. Her research focuses on high-order harmonic generation in gases and attosecond science. When not working, she enjoys being with her family.

Cord L. Arnold started his scientific career in 2003 in Hannover, Germany. He worked in three different fields of ultrafast optics, ranging from very applied to quite fundamental research. He obtained his PhD in biophotonics at the Laser Center Hannover and afterwards spent a postdoc at Laboratoire d'Optique Appliquée, focusing on applications in nonlinear ultrafast optics. Today Cord Arnold works in attosecond science and holds a position as assistant professor at the Lund High-Power Laser Facility.

Thomas Fordell grew up in a small town on the northwestern coast of Finland. He got his MSc and PhD degrees in physics from the University of Helsinki in 2002 and 2007, respectively. Thomas has worked with lasers and optoelectronics since 2002, starting with low-power, continuous-wave devices during his graduate years and moving on to high-power ultrafast systems during his postdoc years. He is currently working on light sources and optics for an optical atomic clock. Thomas is experienced in laser dynamics, laser stabilization, feedback, optics and electronics.


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