JOEL WILLIAMS, ASSOCIATE EDITOR [email protected]Researchers from the Institute of Intense Lasers and Applications (CELIA) at the University of Bordeaux have developed a glass micro-drilling method using a femtosecond laser operating in gigahertz-burst (GHz burst) mode. The researchers used the method to achieve taper-free, elongated holes with smooth inner walls without creating cracks in the glass. Typically, laser drilling with standard single femtosecond pulses results in tapered holes of strongly limited length and rough inner surface. 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