Generation of 180 W average green power from a frequency-doubled picosecond rod fiber amplifier

Abstract

We report on the generation of 180 W average green power from a frequency-doubled picosecond rod fiber amplifier. In an Yb-doped fiber master-oscillator-power-amplifier system, 2.3-ps 704 MHz pulses are first amplified in small-core fibers and then in large-mode-area rod fibers to produce 270 W average infrared power with a high polarization extinction ratio and diffraction-limited beam quality. By carrying out frequency doubling in a lithium triborate (LBO) crystal, 180 W average green power is generated. To the best of our knowledge, this is the highest average green power achieved in fiber-based laser systems.

Stable operation of a high-voltage high-current dc photoemission gun for the bunched beam electron cooler in RHIC

“…3. A 704 MHz drive laser [49] and an ultrafast pulse picker [50] have been developed to produce 9 MHz optical macrobunches (30 pulses per bunch).…”

Higher order mode damper for low energy RHIC electron cooler superconducting radio frequency booster cavity

“…The LEReC project uses a DC photoemission gun with multi-alkali (CsK2Sb or NaK2Sb) cathode [9]. To get the desired 24 mm "flat-top" line density distribution, 32 Gaussian laser pulses, with 0.6 mm rms length and 0.75mm spacing, are stacked together [10]. In this case, one cannot simply use a 1 cm rms length Gaussian bunch for short range wake field simulation since a 0.6 mm bunch exhibits a frequency content much higher than the 1 cm bunch.…”

Wake loss and energy spread factor of the LEReC Booster cavity caused by short range wake field

“…Binping Xiao, Michael Blaskiewicz, Alexei Fedotov, Tianmu Xin LEReC project uses a DC photoemission gun with multi-alkali (CsK2Sb or NaK2Sb) cathode [1]. To get 24 mm "flat-top" distribution, 32 Gaussian laser bunches with 0.6 mm rms length are stacked together with 0.75 mm distance [2]. In this case one cannot simply use a 1 cm rms length Gaussian/step/delta bunch for short range wake field simulation since a 0.6 mm bunch contains frequency much higher than the 1 cm bunch.…”