We propose and demonstrate a novel technique for increasing the amplitude of coherent population trapping (CPT) resonances in open Λ systems. The technique requires no complex modifications to the conventional CPT setup and is compatible with standard microfabrication processes. The improvement in the CPT resonance amplitude as a function of intensity of the excitation light agrees well with the theory based on ideal open and closed Λ systems.
© 2006 Optical Society of America
Original Manuscript: April 4, 2006
Revised Manuscript: May 14, 2006
Manuscript Accepted: May 16, 2006
Published: July 10, 2006
V. Shah, S. Knappe, P. D. D. Schwindt, V. Gerginov, and J. Kitching, "Compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Λ systems," Opt. Lett. 31, 2335-2337 (2006)