We demonstrate a new design for a four-pass dye laser amplifier that can be used to reduce amplified spontaneous emission (ASE) in the amplifier output beam. Compared with the results obtained from normal operation of the four-pass dye laser amplifier without a frequency-selective device, by using a diffraction grating in the amplifier we can reduce the ASE ratio by a factor in excess of 10 and increase output energy by ∼4%. The obtained ASE ratio of the four-pass amplifier system is <1.5%.
© 1998 Optical Society of America
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.2050) Lasers and laser optics : Dye lasers
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6360) Spectroscopy : Spectroscopy, laser
Jae Won Hahn and Yong Shim Yoo, "Suppression of Amplified Spontaneous Emission from a Four-Pass Dye Laser Amplifier," Appl. Opt. 37, 4867-4870 (1998)