Supercontinuum laser beam (IMAGE) Optica Caption For the new technique, the researchers developed a way to transmit a femtosecond pulsed laser through a thick optical window and then used a process called laser induced filamentation to expand it into a supercontinuum pulse that remains coherent. The range wavelengths in the expanded pulse is pictured. Credit Alexis Bohlin, Luleå University of Technology Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.