scholarly journals Precise Measurement of Hyperfine Structure of Cesium 7S1/2 Excited State

2020 ◽  
Vol 10 (2) ◽  
pp. 525 ◽  
Author(s):  
Yunhui He ◽  
Jiabei Fan ◽  
Liping Hao ◽  
Yuechun Jiao ◽  
Jianming Zhao
Keyword(s):  
Excited State ◽  
Hyperfine Structure ◽  
Precise Measurement ◽  
Double Resonance ◽  
Probe Laser ◽  
Transition Line ◽  
Coupling Laser ◽  
Electro Optic ◽  
Fabry Perot ◽  
Optical Double Resonance

We present a precise measurement of the hyperfine structure of cesium 7 S 1 / 2 excited state by employing electromagnetically induced spectroscopy (EIS) with a cesium three-level cascade ( 6 S 1 / 2 − 6 P 3 / 2 − 7 S 1 / 2 ) atom in a room temperature vapor cell. A probe laser, λ p = 852 nm, was coupled to a transition | 6 S 1 / 2 ⟩ → | 6 P 3 / 2 ⟩ , related frequency locked to the resonance hyperfine transition of | 6 S 1 / 2 ⟩ → | 6 P 3 / 2 ⟩ with a Fabry–Perot (FP) cavity and an electro-optic modulator (EOM). A coupling laser, λ c = 1470 nm, drove the | 6 P 3 / 2 ⟩ → | 7 S 1 / 2 ⟩ transition with the frequency scanned over the | 6 P 3 / 2 ⟩ → | 7 S 1 / 2 ⟩ transition line. The hyperfine level interval was extracted to be 2183.61 ± 0.50 MHz by analyzing EIS spectroscopy. The optical–optical double-resonance (OODR) spectroscopy is also presented for comparison, with the corresponding value of the hyperfine level interval being 2183.48 MHz ± 0.04 MHz, and the measured hyperfine splitting of excited 7 S 1 / 2 state is shown to be in excellent agreement with the previous work.

Optical double resonance with laser-induced fluorescence detection

1982 ◽  
Vol 307 (1500) ◽  
pp. 603-615 ◽  
Keyword(s):  
Free Radicals ◽  
Laser Beam ◽  
Hyperfine Structure ◽  
Fluorescence Detection ◽  
Molecular Species ◽  
Double Resonance ◽  
Laser Induced Fluorescence ◽  
Intense Laser ◽  
Laser Induced Fluorescence Detection ◽  
Optical Double Resonance

The saturation of level populations induced in a molecule by an intense laser beam may be probed by a second beam at the same or a different frequency. A number of schemes have been based on this principle for simplifying complex spectra or for achieving sub-Doppler resolution. Fluorescence detection provides the sensitivity for studies on free radicals and other transient molecular species. The two beams may be provided by two separate lasers, or by sideband modulation of a single laser. These techniques are reviewed. Emphasis is placed on recent studies of hyperfine structure, of Stark splittings, and of Zeeman splittings.

scholarly journals C.W. Optical–Optical Double Resonance in /2: Hyperfine Structure in the E 0−g+– B 0u+ System

1983 ◽  
Vol 1 (5) ◽  
pp. 343-355 ◽  
Author(s):  
J. B. Koffend ◽  
R. Bacis ◽  
M. Broyer ◽  
J. P. Pique ◽  
S. Churassy
Keyword(s):  
Hyperfine Structure ◽  
Double Resonance ◽  
Single Frequency ◽  
Hyperfine Parameters ◽  
Excitation Spectra ◽  
Fluorescence Excitation ◽  
Fluorescence Excitation Spectra ◽  
Optical Double Resonance ◽  
First Time

Hyperfine structure for several E(0g+)–B(0u+) rovibrational transitions has been measured for the first time. Two single frequency lasers were used to excite E(0g+)(υ*, J*)–B(0u+)(υ′, J′) – X(1Σg+)(υʺ, Jʺ) transitions which result in Doppler-free E(0g+)(υ*, J*)–B(0u+)(υ′, J′) fluorescence excitation spectra. Hyperfine parameters are obtained for E(0g+)υ = 11 (eQq = +483±4 MHz, C = –210±3 kHz) and E(0g+)υ = 8 (eQq = +492.3±2.5 MHz, C = –205±3 kHz). The non-zero C constant is shown to arise from mixing with a nearby 1g state and the eQq constant shows the 3P2(I+) origin of the E(0g+) state.

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