The laser system for the ERL electron source at Cornell University

Dimitre G. Ouzounov, Ivan V. Bazarov, Bruce Dunham, Charles Sinclair, Shian Zhou, Frank W. Wise
2007 2007 IEEE Particle Accelerator Conference (PAC)  
A master oscillator-power amplifier (MOPA) laser system has been developed to meet the requirements of the Cornell ERL high brightness electron photoinjector. The system is comprised of a Yb-fiber laser oscillator, a single-mode fiber pre-amplifier and a double-clad, large mode area fiber amplifier. The system provides 5 watts average infrared power in a train of 3-ps pulses at 50 MHz. These pulses are efficiently frequency-doubled to produce 2-ps pulses at 520 nm with more than 40 nJ energy
more » ... han 40 nJ energy per pulse. We demonstrate an efficient longitudinal pulse shaping technique that allows us to achieve 20-to 40-ps-long, nearly flat-top pulses with sharp rise and fall times. We characterize the noise properties of the fiber oscillator and discuss the route to upgrade the system to achieve 130-watt average infrared power and a repetition rate of 1.3 GHz.
doi:10.1109/pac.2007.4440268 fatcat:juyivmmucndhza45bsheb4obli