Optofluidic laser based on a hollow‐core negative‐curvature fiber

Abstract

Abstract An optofluidic laser based on a hollow‐core negative‐curvature fiber (HC‐NCF) is proposed and demonstrated. The submicron‐thick circular capillary tubes embedded in the cladding of the HC‐NCF act as antiresonant elements and are used as both a resonator and dye microfluidic channels. A stable optofluidic dye laser with a low threshold of 15.14 nJ/mm 2 is achieved. The laser is compact and robust and exhibits directional output.