The Philippine Institute of Volcanology and Seismology (Phivolcs) has raised Alert Level 1 (low-level unrest) over Bulusan. (Photo courtesy of Phivolcs) MANILA – A 24-minute phreatic eruption occurred ...

Abstract: In this work, we propose a method of efficiently generating a watt-level 1.72 µm ultrafast fiber laser by using a Raman amplifier seeded by a single frequency continuous wave (CW) laser. The ...