Hyperfine measurement of $6\text{P}_{1/2}$ state in $^{87}\text{Rb}$ using double resonance on blue and IR transition

TL;DR

This study employs double resonance spectroscopy with EIT and optical pumping to precisely measure the hyperfine splitting of the 6P$_{1/2}$ state in $^{87}$Rb at 780 nm and 421 nm, achieving high accuracy and validation against other methods.

Contribution

It introduces a double resonance spectroscopy technique combining EIT and optical pumping for precise hyperfine measurements in rubidium.

Findings

Hyperfine splitting measured with <400 kHz precision.

Results agree with electrical discharge and saturated absorption spectroscopy.

Demonstrates effective use of double resonance for atomic state analysis.

Abstract

In this paper, we present the spectroscopy of 6P$_{1/2}$ state in $^{87}$Rb using double resonance technique at $780~\text{nm}$ and $421~\text{nm}$. The double resonance technique is implemented using electromagnetically induced transparency (EIT) and optical pumping methods. Using these spectroscopy methods, we have measured the hyperfine splitting of 6P$_{1/2}$ state with precision of $<$400~kHz which agrees well with other spectroscopy methods such as electrical discharge and saturated absorption spectroscopy at $421~\text{nm}$.