Ultranarrow bandpass Na vapor dispersive Faraday filters at 589 nm are studied experimentally and theoretically. Their anticipated performance in the line-center operation is demonstrated experimentally with a thin Na cell in an axial magnetic field of 1750 G. A peak vapor transmission of 85%, a FWHM linewidth of 0.002 nm (or 1.9 GHz), and a background transmission of 2 × 10−5 have been achieved.
© 1993 Optical Society of America
Original Manuscript: December 3, 1992
Published: June 15, 1993
H. Chen, Paul Searcy, Eric Korevaar, and C. Y. She, "Sodium-vapor dispersive Faraday filter," Opt. Lett. 18, 1019-1021 (1993)