Abstract
We describe a one-laser optical–optical double resonance (OODR) scheme whereby sub-Doppler Zeeman splittings of individual rovibronic transitions are presented in a uniquely simple and diagnostically powerful format. Each rovibronic transition yields at most two Zeeman resonance features, each associated with the approximately M-independent (J,M+1)–(J,M − 1) Zeeman interval in either the upper or the lower state. Two laser beams, ωl and an acousto-optically shifted sideband at ωl + ωA0, copropagate through the sample. A sideband-OODR-Zeeman (SOODRZ) resonance results when a (J,M+1)–(J,M − 1) interval is Zeeman tuned through resonance with ωA0 . The SOODRZ effect, detected against a dark background in a magnetic rotation spectroscopy configuration, is illustrated for several lines of the NiH B 2 Δ5/2–X 2 Δ5/2 (1,0) band.
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