Femtosecond laser-induced damage on the end face of an As2S3 chalcogenide glass fiber.

• Morphologies of damage craters were inequable with an increasing laser fluence. • Damage threshold on surface of As 2 S 3 fiber is slightly larger that of As 2 S 3 glass. • Morphologies of damage craters on surface of As 2 S 3 fiber and glass were similar. • Compared with damage in MIR region, damage threshold decreased under 800 nm laser. In this study, we investigated femtosecond laser-induced damage on the end face of an As 2 S 3 chalcogenide (ChG) glass fiber by repeatedly inducing 1 kHz ultrashort pulses with 150 fs duration at 800 nm wavelength in comparison with the bulk As 2 S 3 glass. The damage size, geometries, and morphology changes under different laser powers were measured and analyzed with optical, and scanning electron microscopes (SEM). The laser-induced damage threshold on the end face of three As 2 S 3 fibers calculated using the linear regression method was 32.15 mJ/cm2, whereas that of As 2 S 3 bulk glass was approximately 24.32 mJ/cm2. The femtosecond laser-induced damage on the As 2 S 3 bulk glass at 800 nm wavelength was also compared with that in the mid-infrared (MIR) region, which indicates a decrease in the damage threshold and an aggravation in the morphologies of damage craters under an irradiation of 800 nm femtosecond pulsed laser. To the best of our knowledge, this study is the first to investigate the interaction of femtosecond laser with the end face of ChG glass fiber. This work provides scientific guidance for the fabrication of novel photonic devices based on ChG glass fibers. [ABSTRACT FROM AUTHOR]