High Repetition-Rate Laser Z-Scan Measurements: Criterion for Recognizing Adverse Thermal Effects

Flexible high-repetition-rate ultrafast fiber laser

High-repetition-rate pulses have widespread applications in the fields of fiber communications, frequency comb, and optical sensing. Here, we have demonstrated high-repetition-rate ultrashort pulses in an all-fiber laser by exploiting an intracavity Mach-Zehnder interferometer (MZI) as a comb filter. The repetition rate of the laser can be tuned flexibly from about 7 to 1100 GHz by controlling ...

High-Repetition Rate Measurements of Temperature and Thermal Dissipation in a Nonpremixed Turbulent Jet Flame

An ultrahigh intensity laser at high repetition rate

We present an ultra intense laser system with high repetition rate (300 Hz) and good stability (1% RMS shot to shot fluctuation). By focusing the 21fs laser beam down to a 1.6 μm spot with aberration-compensated optics, we demonstrated that a peak intensity of 4×10 W/cm was produced with 2.5 mJ pulse energy. The intensity was confirmed by laser field ionization of argon atoms. With 8 fs pulses,...

Micromachining with a High Repetition Rate Femtosecond Fiber Laser

Industrial micromachining applications with ultrashort pulse lasers are often difficult to make practical due to the lack of robustness of the laser and the slow processing speed resulting from the low repetition rate. In the past, amplified, femtosecond lasers produced high pulse energies, but at a slow pulse repetition rate of around a kHz. The high repetition rate oscillators did not have en...

Tunable, high-repetition-rate, harmonically mode-locked ytterbium fiber laser.

We report a ytterbium fiber laser mode locked at its 281st harmonic, which corresponds to a repetition rate greater than 10 GHz. The laser produces linearly polarized, 2-ps pulses with up to 38-mW of average output power. The mode-locked pulses are tunable over a 58-nm window centered on 1053 nm.