Photonics Research, 2017, 5 (4): 04000293, Published Online: Oct. 10, 2018
Fiber laser with random-access pulse train profiling for a photoinjector driver
Abstract
We report on the design and performance of a fiber laser system with adaptive acousto-optic macropulse control for a novel photocathode laser driver with 3D ellipsoidal pulse shaping. The laser system incorporates a three-stage fiber amplifier with an integrated acousto-optical modulator. A digital electronic control system with feedback combines the functions of the arbitrary micropulse selection and modulation resulting in macropulse envelope profiling. As a benefit, a narrow temporal transparency window of the modulator, comparable to a laser pulse repetition period, effectively improves temporal contrast. In experiments, we demonstrated rectangular laser pulse train profiling at the output of a three-cascade Yb-doped fiber amplifier.
Ekaterina I. Gacheva, Anatoly K. Poteomkin, Sergey Yu. Mironov, Viktor V. Zelenogorskii, Efim A. Khazanov, Konstantin B. Yushkov, Alexander I. Chizhikov, Vladimir Ya. Molchanov. Fiber laser with random-access pulse train profiling for a photoinjector driver[J]. Photonics Research, 2017, 5(4): 04000293.