2005/10/01 by Hiromitsu Kiriyama, Koichi Yamakawa, Nobuto Kageyama +4 · 4 citations
Engineering · Physics and Astronomy · #Amplifier #Energy conversion efficiency #Laser #Laser beam quality #Laser power scaling #Laser-Matter Interactions and Applications #Materials science #Optical amplifier #Optics #Optoelectronics #Photorefractive and Nonlinear Optics #Physics #Power (physics) #Solid State Laser Technologies #Ti:sapphire laser
paper · doi:10.1143/jjap.44.7464
published in Japanese Journal of Applied Physics 44(10R), 7464 (Institute of Physics)
openalex publication_date 2005/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
We describe a compact laser-diode-pumped, phase conjugate Nd:YAG master oscillator power amplifier system with a reduced number of components in the single slab amplifier geometry. This system is readily suited for pumping a Ti:sapphire amplifier, making it possible to construct a compact, high-repetition-rate, terawatt-peak-power chirped-pulse amplification system. An average infrared power of 362 W at a repetition rate of 1 kHz in a 29 ns pulse has been produced with an optical-to-optical efficiency of 14%. With a KTiOPO 4 frequency-doubling crystal, an average green output power of 132 W at a repetition rate of 1 kHz has also been generated when pumped at an input incident power of 222 W, corresponding to a second-harmonic energy conversion efficiency of 60%. The average power at both infrared and green wavelengths represents a record performance for a single-amplifier system. We discuss in detail the design, performance and operation of the system including output power, optical efficiency, beam quality and stability.