We have calculated the solar background rejection of the Mg atomic resonance filter operating at the b1 Fraunhofer wavelength (518.4 nm) as a function of the pressure-broadened filter linewidth. For pressure broadening induced by the noble gases the solar background rejection decreases from 93% at a 0.002-nm bandwidth to 82–84% at a 0.02-nm bandwidth. Solar background rejection was insensitive to buffer gas and was optimum for the noble gas with the smallest shift-to-broadening ratio.
© 1989 Optical Society of America
Original Manuscript: August 15, 1988
Manuscript Accepted: November 30, 1988
Published: February 15, 1989
J. A. Gelbwachs and M. D. Tabat, "Solar background rejection by a pressure-broadened atomic resonance filter operating at a Fraunhofer wavelength," Opt. Lett. 14, 211-213 (1989)