Single-frequency pulsed laser source with hybrid MOPA configuration.
A unique approach with a hybrid master oscillator power amplifier configuration to obtain single-frequency, high-energy laser pulses at 1064 nm is presented. The setup consists of a single-frequency seed laser, a multistage fiber amplifier, and a four-pass crystal rod amplifier. Pulse energy of 10 mJ is obtained at the repetition rate of 100 Hz. The pulse width is about 110 ns with a transform-limited linewidth of 3.2 MHz. The M(2) factor of the output beam is about 1.5. To our knowledge, this is the first report of using a hybrid amplifier to obtain 10 mJ pulses with long pulse width and transform-limited linewidth.
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Jiading District, Shanghai, China.
Ren
R
Zhu
Juntao
J
Wang
Jun
J
Zhou
Jiqiao
J
Liu
Weibiao
W
Chen