Title :
High repetition rate, wide-aperture KrF lasers for subpicosecond amplification
Author :
Nodomi, Ryoichi ; Oeda, Yasuo ; Sajiki, Kazuaki ; Nakajima, Shin ; Watanabe, Manabu ; Watanabe, Shigetaka
Author_Institution :
Komatsu Ltd., Kanagawa, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
A high repetition rate, wide-aperture KrF laser with a magnetic switch has been developed. A dynamic response and a core loss of several magnetic materials were measured, resulting in a loss as low as 0.45 J/pulse for a voltage risetime of ~100 ns. A maximum output energy of 2.5 J in 20 ns (FWHM) was obtained with a total efficiency of 2.5% at 20 Hz. The cross section of the output beam was 65×50 mm2. Spectral, spatial, and temporal profiles of gain and absorption coefficients were also measured, resulting in a peak gain of 8.5%/cm. An output energy of 410 mJ was extracted in 280 fs with two beams by using this laser as an amplifier
Keywords :
excimer lasers; high-speed optical techniques; krypton compounds; 2.5 J; 2.5 percent; 280 fs; 410 mJ; absorption coefficients; amplifier; core loss; cross section; dynamic response; full width half maximum; gain coefficient; high repetition rate; magnetic materials; magnetic switch; maximum output energy; output beam; spatial profiles; spectral profiles; subpicosecond amplification; temporal profiles; total efficiency; voltage risetime; wide aperture KrF excimer laser; Absorption; Core loss; Gain measurement; Laser beams; Loss measurement; Magnetic materials; Magnetic switching; Pulse measurements; Switches; Voltage;
Journal_Title :
Quantum Electronics, IEEE Journal of
